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The following is a compilation of Q&A's submitted by enthusiasts and answered by Ed.


Part Sixty Nine Q&A 1701 - 1725

1701. I have a 2003 GT (HO) PT with 75k miles. The turbo started to whistle while accelerating and there is oil leaking into the air cleaner box. I need to know if there is a gasket replacement for this problem or if the turbo needs to replaced all together? Thanks for your time. – David, from Texas.

Some oil seepage into the air box is normal. Noisy operation can be caused by a variety of issues including:

1. Leak in charge air cooler hose.
2. Intake or exhaust leaks.
3. Oil starvation.
4. Worn turbocharger bearings.
5. Damaged turbine/compressor fins.

We suggest that you have it checked to determine the exact nature and severity of the problem.


1702. I have a 2002 LE PT with 51k miles. None of the power outlets work, I checked the fuses. – Michael, from Ohio.

Recheck fuse #20 (20amp) in the PDC. If it's ok and both power outlets are dead it's most likely an issue with the circuit wiring. It is not likely to be the ignition switch since the front power outlet is always hot regardless of ignition switch position and the rear ear power outlet is controlled by the ignition switch.


1703. I have a 2006 BE PT with 18k miles. I recently purchased a trailer hitch. The hitch dealer sold me a universal wiring kit. I hooked it up according to the instructions and one month later I noticed that my brake lights were not working. My Chrysler dealer disCovered that it was incorrectly wired for the hitch. They told me I should have installed fuses between the trailer wiring harness and the cars wiring harness that I tied into. Chrysler claims the trailer feedback into the front control module burnt out the brake module, which is part of the fuse box. Do you know where I can purchase a reasonable replacement? – Dave, from Louisiana.

This is not a good beginning with your new PT. We suggest that you have the dealer handle the repair. The PDC or Totally Integrated Power Module (TIPM) is serviced as a unit with the engine compartment wire harness. If any internal circuit of the TIPM or the TIPM housing is faulty or damaged, the entire TIPM and engine compartment wire harness unit must be replaced. Availability on a 2006 model year PT would probably be limited to Mopar or your local dealer. It is doubtful that you would locate one in salvage yard or through an aftermarket auto parts dealer since the component was newly redesigned for the 2006 model year. A DIY repair would require some DIY experience and familiarity with the process, and a service manual. OE Guides are also available through the Pit area.


1704. I have a 2001 LE PT with 71k miles. I'm told that the PT has inherent dashboard cracking problems. Can you give me the P/N? How hard is it to replace? Thanks. – Frank, California.

There have been a few reported instances of cracked dashboards. Not a difficult DIY repair. You'll need a service guide, or the OE procedure is available in the Pit area on the site.

COVER, Instrument Panel, With Demister Grilles P/N RB71 WL8AD


1705. I have a 2001 LE PT with 86k miles. The PT was overheating in stop/go traffic, and during long stops, but not on highway. I took it to dealer and it was diagnosed as a faulty fan. I picked the car up and it still overheated. Then they wanted to get into the head and I suggested trying something else first. They replaced the thermostat and radiator. I picked the car up drove it for an hour and it seems to be running fine, except now I do not have any interior heat. Any insight as to why I have no heat? – Kim, from Ohio.

The HVAC system pulls outside air through the cowl opening at the base of the windshield, then into the plenum chamber above the heating, ventilation and air conditioning housing. On models equipped with air conditioning, the air passes through the evaporator. Air flow can be directed either through or around the heater core. This is done by adjusting the blend-air door with the TEMP control on the instrument panel. The air flow is then directed from the panel, floor and defrost outlets in various combinations using the mode selector.

The heater core is located in the HVAC housing, behind the instrument panel. Engine coolant is circulated through the heater hoses and heater core at all times. As the coolant flows through the heater core, heat removed from the engine is transferred to the heater core fins and tubes. Air directed through the heater core picks up the heat from the heater core fins. The blend door allows control of the heater output air temperature by regulating the amount of air that is flowing through the heater core within the HVAC housing.

Assuming that you have the “heat” mode set correctly and you have forced air flow through the system, you may have a plugged or air locked heater core, a vacuum issue with the blend air door, an obstructed cowl air intake, or heater system outlets. Given that they have worked on the system, it could simply be any number of things. I would suggest that you revisit the shop that handled the repair work.


1706. We have a 2001 LE PT with 10.3k miles. The engine light is on (fault code P0600), but the car seems to drive fine. The mechanic wants to replace the PCM and charge us $700 for the repair. What options do we have? - Angela, from California.

P0600 (M) PCM Failure SPI Communications - No communication detected between co-processors in the control module.

When Monitored: With the ignition on.

Set Condition: Internal Bus communication failure between the Engine and Transmission processors.
Possible causes are PCM or SPI.

If they ran the diagnostic and encountered this error the repair requires the replacement of the PCM.


1707. I have a 2001 BE PT with 145k miles. The PT overheated with a great deal of steam coming out of the engine compartment. I drove it three miles home after it had cooled down with the heater control on max. I replaced the thermostat and the car continued to overheat and loose coolant. When this happened, the coolant would boil out of the overflow container. I took it to my mechanic who discovered a head gasket leak. He put in a copper-based sealant, and it did not seal the leak. I purchased Bars Head Gasket Repair and Block Seal. I drained the coolant system using a T connection to the heater. I flushed the system with Zerex radiator flush and re-flushed the cooling system at least two times afterwards. I put in the Bars Leak and idled the car for an hour. No water and Bars Leak leaked out of the head gasket or cooling system. My problem is that during this process, the throttle has stuck and the car now idles at 2200rpms. Could this be a problem with the idle position sensor? Any ideas or suggestions would be of great help as I have a lot of time invested in flushing and re-flushing and re-flushing the system! I have not installed any new coolant as I'm afraid the idle problem could be detrimental to the process I've just gone through. Thank you! – Walter, from Florida.

The PT does not utilize an idle position sensor. The PCM adjusts engine idle speed through the idle air control (IAC) motor to compensate for engine load, coolant temperature or barometric pressure changes. The throttle body has an air bypass passage that provides air for the engine during closed throttle idle. The idle air control motor pintle protrudes into the air bypass passage and regulates air flow through it. The PCM adjusts engine idle speed by moving the IAC motor pintle in and out of the bypass passage. The adjustments are based on inputs the PCM receives from the throttle position sensor, crankshaft position sensor, coolant temperature sensor, MAP sensor, vehicle speed sensor and various switch operations (brake, park/neutral, air conditioning).

It is not likely that you disconnected any of the sensors which control idle if the issue began immediately after adding the sealer however give the sensors a quick once over to ensure that everything is firmly connected.

Next, check for vacuum issues; loose or disconnected hoses on the PVC valve, engine make up air hose on the manifold and air box, brake system, etc. Aluminum heads and engine overheating are a bad combination which can result in a warped or cracked head or leaky/blown head gasket, all of which can also cause vacuum issues. (A compression and or leakdown test would help rule this out.)

I would check/clean the throttle body next. The sealer may have gummed up the IAC motor pintle causing it to hang up in the bypass passageway. If there is no change after cleaning the throttle body and you decide to remove and clean the IAC motor I would suggest that you have a service manual on hand, or review the OE guide in the Pit area on the site. (There's also a throttle body cleaning procedure there.)


1708. I have a 2002 TE PT with 2.0L engine and 89k miles. Fault P0171 has appeared on my Engine Management System. This appears to be mixture too lean, bank 1. Other than this, my car seems to be running and idling perfectly well. Doing a little research, the lean mixture could be caused by vacuum system leak(s) blocked fuel injectors, dirty MAP sensor, faulty EGR valve? Are these assessments correct and have I overlooked anything? Thank you! - Andrew, from the U.K.

P0171 - 1/1 Fuel System Lean - A lean air/fuel mixture has been indicated by an abnormally rich correction factor.

There are a number of possible causes including:

Restricted Fuel Supply Line
Fuel Pump Inlet Strainer Plugged
Fuel Pump Module
O2 Sensor
O2 Signal Circuit
O2 Return Circuit
O2 Sensor Heater Operation
Throttle Position Sensor Sweep
MAP Sensor Operation
ECT Sensor Operation
Engine Mechanical Problem
Fuel Contamination/Exhaust Leak

The majority of tests performed to rule out each component require the use of a DRB III scan tool and or special equipment which most owners do not have, therefore your ability to DIY will be limited. However the diagnostic that I provided will give you some idea on which areas to focus on.


1709. I have a 2001 PT with 35K miles. I live in Costa Rica and there is only one Chrysler dealership and don't know much about the PT, so I have to do a lot of things myself or have them done by my trusted mechanic. The car runs great, but last week the check engine light came on. The self tests gave me the codes P1684 and P0141. After some research I realized that P1684 can be ignored, and after checking the gas cap and disconnecting negative battery cable there is no more check engine light. I read that P0141 indicates 1/2 O2 Sensor Heater Failure, but should I do something about it? Really appreciate any help.  – Forum poster, from Costa Rica.

The battery disconnect will extinguish the MIL light temporarily, however the code is stored in memory and the MIL will reoccur if the issue which originally caused it has not been resolved.  

Fault Code P0141 - 1/2 O2 Sensor Heater Failure. Oxygen sensor heater element malfunction. Possible causes for a P0141 fault code here:

O2 Sensor Heater Operation
O2 Heater Element
O2 Heater Ground Circuit Open
O2 Heater Control Circuit Open

I'm afraid that this isn't a DIY repair. It will require the use of a DRB III scan tool, special equipment and a diagnostic manual to diagnose. If the local dealer knows how to use a DRB scan tool they should be able to help you.


1710. I have a 2003 GT (HO) PT with 50k miles. Whenever the fuel gets below a quarter of a tank, right after a fill up, the check engine light comes on at start up and stays on. Fault code 0441. I have replaced the purge solenoid, gas cap, and leak detector. When I go to the dealer, they can not find anything wrong, and reset the light. Thank you. – Edward, from Florida.

P0441 Evap Purge Flow Monitor -Insufficient or excessive vapor flow detected during evaporative emission system operation.

Possible causes for P0441 include:

Intermittent Condition
Checking Evap Purge Solenoid Functionality
Evap Purge Solenoid Vacuum Supply

It sounds like they may have checked everything except Evap Purge Solenoid Vacuum Supply. If it's ok, it may be an intermittent condition which is more difficult to diagnose. You may have to wait for a complete failure before the can duplicate, diagnose and repair.


1711. I have a 2003 LE PT with 68.5k miles. I'm receiving a P0128 error code; what does this code indicate as a problem? – Larry, from Colorado.

P0128 Thermostat Rationality - A rationality error has been detected for the thermostat.

Possible causes include:

Coolant Level
Coolant Temperature
Intermittent Condition


1712. I have a 2001 LE PT with 86k miles. The floor shifter light no longer works. I can't see which position the shifter is in. – Robert, from Texas.

The interior lighting for the front power window switch, A/C heater control switch, overhead console module and trans range indicator Illumination are controlled through the cluster and fed by fuse 10 (10amp) in the interior fuse box. If everything is operational except the trans range indicator you probably have a bad bulb. Remove the floor console and replace the bulb, P/N T74.


1713. I have a 2003 LE PT with 40.5k miles. When I try to start the car it sounds like it is trying to start, but it won't. It takes maybe 15 times until it will finally start and then the engine light pops on (DTC 335, 340, 462, 522, and 1681) and stays on for a few days. This has happened twice with probably a month in between. It seems a bit jerky when it is trying to start, not real smooth. - Rita, from Oregon.

You have a variety of faults which may all be related to the same issue. On previous occasions combinations of a few of these DTC's have been diagnosed as wiring/electrical issue. Further troubleshooting will be required to pinpoint the problem. It's time for a trip to the dealer.

P0335 Crankshaft Position Sensor Circuit - A rationality error has been detected for loss of crankshaft position sensor.

Possible causes include:

Checking Intermittent CKP Signal With Lab
5-Volt Supply Circuit Shorted To Ground
5-Volt Supply Circuit Open
5-Volt Supply Circuit Shorted To Voltage
CKP Sensor Signal Circuit Shorted Ground
CKP Sensor Signal Circuit Open
CKP Sensor Signal Circuit Shorted To Voltage
CKP Sensor Signal Shorted To 5-Volt Supply Circuit
Sensor Ground Circuit Open
Crankshaft Position Sensor
PCM - CKP Sensor Signal
PCM - 5-Volt Supply

P0340 Camshaft Position Sensor Circuit - A rationality error has been detected for loss of camshaft position sensor.

P0462 Fuel Level Sending Unit Volts Too Low - Fuel level sensor input below acceptable voltage.

Possible causes include:

Good Trip Equal To Zero
Intermittent Condition

P0522 Oil Pressure Sensor Low - Oil pressure sensor input below acceptable voltage.

Possible causes include:

Good Trip Equal To Zero
Oil Pressure Sensor Internal Failure
OPS Signal Circuit Open
OPS Signal Circuit Shorted To Voltage

P1681 No I/P Cluster CCD/J1850 Messages Received - No CCD/J1850 messages received from the cluster control module. No other information on this DTC.


1714. I have a 2003 GT (HO) PT with 66k miles. The driving lights are not coming on and the indicator for them is not coming on either. I think it's a fuse but don't know which one. – Christopher, from North Carolina.

The description of "driving lights" is much too generic to be of much value for troubleshooting. I will assume that you're talking about the headlamps only. Possible causes for no headlamp illumination include:

1. No voltage to headlamps. The left and right headlamps are fed by different fuses. If both headlamps are out it is not likely to be fuse related. The circuit will need to be checked for continuity. Look for issues with the wiring, broken connector terminals or wire splices.

2. No Z1-ground at headlamps. Check the condition of the headlamp grounds.

3. Faulty headlamp switch or dimmer. Test the multifunction switch. They're a common failure on the PT.

A diagnostic to test the multifunction switch and wiring schematics are available in the Pit area.


1715. I have a 2002 BE PT with 90k miles. The PT was run about 10 miles without water and hasn't run to well after that. I removed the head and sent it to a machine shop that checked for cracks and warpage. They had to remove .030 from the head to get it square again. I purchased a new top end gasket set, radiator hoses, water pump, timing belt, all external belts, spark plugs and thermostat and reassembled. Before starting I used a OBD II scanner on the car. It came back with a bad water temp sensor which I replaced, than I cleared the code. I started the car, but it was running weird. It kept surging at idle than it would increase the idle about 800 to 1000 rpm. Then it would calm down for about 30 seconds then start surging again. We decided to drive it to a gas station about a mile away, but went only a 1/4 mile before the car quit. I used the scanner again and it came back with 1490 1495 and 1193. These codes are not in the list I have. Is there a way to check the sensors with a multi-meter? Pease help. – Dave, from California.

I've reviewed our 2005-2006 diagnostic manuals for information on the DTC's listed below, however I'm afraid there's no other information available.

P1193 (M) Inlet Air Temperature Circuit - High Inlet Air Temperature sensor input above acceptable voltage.

P1490 (M) Low Speed Fan CTRL Relay Circuit - An open or shorted condition detected in control circuit of the low-speed radiator fan control relay.

P1495 (M) - Leak Detection Pump Solenoid Circuit - An open or shorted condition detected in the Leak Detection Pump (LDP) solenoid circuit.

It's pretty much dependent on the sensor in question. Some can be checked with a meter, others require a DRB scan tool and manual. The diagnostic usually dictates which method to use.

If necessary, wiring schematics are available by request through the Pit area on the site.


1716. I have a 2003 GT (HO) with 66k miles. I am having an issue with my front passenger side lock which no longer works with the keyless entry or the buttons to lock/unlock it. All other doors appear to work fine. Could you please help? – Chris, from North Carolina.

If a passenger door fails to lock and unlock possible causes are:

Door Lock Motor - Open
Door Unlock Relay Output Wire Open
Door Lock Relay Output Wire Open
Door Unlock Relay Output Wire Short to Ground Door Unlock Relay Output Short to Door Lock Relay Output
Door Lock Relay Output Wire Short to Ground

Your local dealer will have to troubleshoot and isolate this issue for you.


1717. I have a 2006 TE PT with 25k miles. I changed the headlamp bulbs to get greater reach with the low beam headlights. It's brighter, but doesn't reach out further. I'd like to adjust the headlamps up a little. I can deduce that the openings around the headlamp assembly are there for adjustment, but how do you do it? What tool do you use? I cannot find anything in the owner's manual about it which is actually quite disappointing. Thanks. – Craig, from Kansas.

There's actually a procedure to correctly align the headlamp. If you intend to wing it look for the recessed area under the headlamp to locate the Torx headlamp alignment screw. If you need additional assistance, please review the OE alignment guide in the Pit area.


1718. I have a 2001 LE PT with 122k miles. I had a valve job done on the head and one bad exhaust valve was replaced. After reinstalling the head the PT initially ran rough. I cleaned the throttle body and engine, but than it would not idle with my foot off the gas, but there was less rough idle. I check and cleaned the PCV valve. With the hose off the engine will run at high 1500-2000rpm. When you put the hose back on the engine will stop running. It will restart, but you have to hold rpm above 1000. If rpm falls below 1000 the engine will start to buck and stop. Have been checking for vacuum leaks and have not found any hoses off or leaking. I have not conducted a vacuum test for fuel pressure. I check for spark and all looks good. The car had been driven with bad valve for a long time. Could this have damage the o2 senor and or the catalytic converter? Thanks for any help you can give. – Paul, from Missouri.

The introduction of a rebuilt and or partially rebuilt engine adds a number of variables into the equation which are not present with most drivability issues. For the most, part services manuals are designed to help diagnose issues with original engine configurations. They are not designed to diagnose issues encountered when rebuilding an engine.

P1193 Inlet Air Temperature Circuit High - Inlet Air Temperature sensor input above acceptable voltage.
I'm afraid that there's no additional information available in the diagnostic manual regarding this specific fault. However a similar fault with the IAT sensor indicates these possible causes which seem to be inline with what you're experiencing:

PCV System - Visually and physically inspect the PCV system. Check for the PCV valve disconnected. Check for an incorrect PCV valve. The PCV valve must meet OEM specifications. Check for damage or kinked vacuum hose.

IAC Motor Passages – Check the throttle body to ensure that it's clean and the IAC motor pintle is not hanging up. Inspect the IAC Motor and passages for any obstructions or damage to motor. (See IAC motor guide before removing from throttle body. There's also a throttle body cleaning procedure there.)

Vacuum Leaks – Start the engine. Inspect the vehicle for external vacuum leaks. Inspect the engine for internal vacuum leaks. Check for loose or disconnected hoses on the PVC valve, engine make up air hose on the manifold and or air box, power brake system, throttle body, head, head gasket, intake manifold gasket and EGR valve. (Aluminum heads and engine overheating, if you experienced any, are a bad combination which can result in a warped or cracked head or leaky/blown head gasket, all of which can also cause vacuum issues. Hopefully, the head was checked before reinstallation and the correct installation procedure was followed. A compression and or leakdown test would help rule out issues in this area.)

Air Induction System – Check for dirty Air Cleaner, Foreign material trapped in the air intake tube and leaks in air Intake tube connection, Air Cleaner housing, etc

Trottle Body and Throttle Linkage - Inspect the throttle body plate carbon build up or other restrictions. Inspect the throttle linkage for binding and smooth operation. Ensure the throttle plate is resting on the stop at idle.

You can read more about the IAT sensor here.

The PCM adjusts engine idle speed through the idle air control valve to compensate for engine load, coolant temperature or barometric pressure changes based upon a variety of inputs, including the throttle position sensor, crankshaft position sensor, coolant temperature sensor, MAP sensor, vehicle speed sensor and various switch operations (brake, park/neutral, A/C). You can read more about the IAC motor and cleaning guide here.

Idon't think it's related the 02 sensor. You would normally see a fault code in this instance. If you have only conducted the self tests I would suggest that you have the PT checked with a DRB scan tool. Many faults codes can be recorded however only a small portion become visible with the self tests.


1719. I have a 2001 TE PT with 98k miles. The engine light came on and self tests reveal a P0123 fault code. I have tried to find pictures, diagrams, and easy to understand info on how to correct this code. The probable causes stated on the info from Auto Zone say the sensor open or shorted internally-replace component, or check connector and wiring to sensor. Thanks. – Kathy, from Texas.

The P0123 fault code indicates: Throttle Position Sensor Voltage High - Throttle position sensor input above the maximum acceptable voltage.

The P0123 fault code is for the circuit, not the sensor. You can check the connector, however other causes include:

Throttle Position Sensor Sweep
Intermittent Condition
TP Signal Circuit Shorted To 5 Volt Supply Circuit
TP Signal Circuit Shorted To Battery Voltage
TP Sensor Internal Failure
TP Signal Circuit Open
Sensor Ground Circuit Open

Voltage and continuity measurements need to be performed. The power and ground circuits need to be verified. I admire your willingness to jump in with both feet, but unless you have experience with a voltmeter, DRB scan tool, diagnostic/service manuals, and familiarity with the electronic systems within the PT, you would be better served by seeing your local dealer for diagnostic help.


1720. We have a 2002 TE PT with 67k miles. We live in a rural area and noticed last night that the headlight high beam indicator on the instrument cluster does not work. Do you know what would cause that? Thank you. – Regis, from Kentucky.

Possible causes include:

High Beam Indicator Circuit Open
High Beam Indicator Bulb
Instrument Cluster

If you have some DIY skills you can troubleshoot the issue with the aid of a diagnostic manual (Pit area, if you do not have access to one) and voltmeter, however dealer repair would be necessary if it were the cluster or possibly an open circuit.


1721. We have a 2003 LE PT 23k miles. Occasionally the front wipers fail to turn off via the switch. My husband thinks there's a problem with the motor. – Ellen, from California.

It is more likely a failing switch. The next time you experience the problem check the switch in low, high and intermittent position. If it stops or fails to stop in any other position replace the switch.


1722. I have a 2001 LE PT with 167k miles. The engine light is on with fault code P0732, P0733, P0734 and P1790. The transmission shifts up and down normally and there's a high pitch noise as the car's speed increases. Let off the gas and coast, there's no noise. – Buddy, from Georgia.

The DTC's are all transaxle related. There's nothing you can DIY, see your dealer.

P0732-Gear Ratio Error in 2nd
P0733-Gear Ratio Error in 3rd
P0734-Gear Ratio Error in 4th
P1790-Fault Immediately After Shift

Possible causes for P0732, P0733 and P0734 include:

Related DTC's Present
Transmission Solenoid/Pressure Switch Assembly
Internal Transmission
Intermittent Gear Ratio Errors

Possible causes for P1790 include "Fault After Shift".


1723. I have a 2002 LE PT with 33k miles. What is the procedure for removing the vanity lamp in the sun visor? Does it just push and pull or twist into the socket? . Thank you for your time. I do appreciate it. – Bobby, from Texas.

Visor Vanity Lamp P/N 6501966

Removal Procedure

1. Lower visor.
2. Insert a small flat bladed tool into the slot between the lamp lens and lamp.
3. Carefully pry lens outward.
4. Remove bulb from socket.

Installation Procedure

1. Position bulb in socket and push into place.
2. Position lens on lamp and snap into place.


1724. I have a 2006 YE PT with 21k miles. The radiator fan has not worked since my PT was involved in a front end collision. The radiator was replaced with an aftermarket brand and is displaying DTC P0481 which is the "radiator fan relay circuit #2. What exactly is that and is it something I can fix? Thanks. – Rodriguez, from Connecticut.

Radiator fan operation is controlled by the Powertrain Control Module (PCM) with inputs from the temperature of the coolant, which is sensed by the coolant temperature sensor, and vehicle speed, which is measured by the vehicle speed sensor. The PCM turns on the fan through either the high or low speed fan relay.

P0481 - High Speed Fan Relay Control Circuit - An open or shorted condition detected in the high speed radiator fan relay control circuit.

Possible causes on the 2005 model year and earlier include:

High Speed Radiator Fan Relay Operation
Fused Ignition Switch Output Circuit
High Speed Radiator Fan Relay Resistance
High Speed Rad Fan Relay Control Circuit Open
High Speed Rad Fan Relay Control Circuit Short To Ground

Possible causes on the 2006 model year and later include:

Fused (B+) Circuits
Ground Circuit
High Speed Rad Fan Control Circuit Shorted To Battery Voltage
High Speed Rad Fan Control Circuit Open
High Speed Rad Fan Control Circuit Shorted To Ground
Radiator Cooling Fan Module
Totally Integrated Power Module

This is not a DIY repair. Unless you have a DRB III scan tool, multi-meter diagnostic manual and the experience to use all three, see your dealer.


1725. I have a 2002 LE PT with 40k miles. The engine runs hot, thermostat is new and working, fan motor seems to be working. Water is flowing well. Are there fuses for fan motor and if so where are they? – Richard, from Florida.

Radiator fan operation is controlled by the PCM with inputs from the temperature of the coolant, sensed by the coolant temperature sensor, and vehicle speed, measured by the vehicle speed sensor. The PCM turns on the fan through either the high or low speed fan relay. To correctly test the fan under all operating parameters you will need a diagnostic manual and DRB scan tool. Have your local dealer test the fan. Fuse #12 (10amp) in the fuse box and fuse #5 (40amp) in the PDC under the hood feed the low and high speed fan relays. See Tech Library, Engine Cooling subsection for additional information.


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