Engine Controls - Erroneous MIL/DTC's
NUMBER: 18-017-03GROUP: Vehicle Performance
DATE: Apr. 25, 2003
SUBJECT:
Erroneous MIL Illumination - Erroneous Diagnostic Trouble Codes (DTCs)
OVERVIEW:
This bulletin involves replacing the Powertrain Control Module (PCM).
MODELS:
2002 (LH) 300M/Concorde/Intrepid/LHS
SYMPTOM/CONDITION
Vehicle operator may describe MIL illumination.
For all 2002 applications, technicians may find the following erroneous DTCs:
P0071 - Ambient Temperature Sensor Performance
P0111 - Intake Air Temperature Sensor Performance
P0116 - Engine Coolant Temperature Sensor Performance
P0128 - Thermostat Rationality
P0325 - Knock Sensor # 1 Circuit
For all 2002 3.5L applications, technicians may find the following erroneous DTCs:
P0121 - Throttle Position Sensor # 1 Performance
For all 2002 2.7L applications built before Nov. 9, 2001, technicians may find the following erroneous DTCs:
P0420 - Catalytic 1/1 Efficiency
P0432- Catalytic 2/1 Efficiency
For all 2002 2.7L applications built before Aug. 27, 2001, technicians may find the following erroneous DTCs:
P0401 - EGR System Performance
DIAGNOSIS:
Using a Scan Tool (DRBIII(R) with the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If DTCs are present, other than those listed above, record them on the repair order and repair as necessary before proceeding further with this bulletin.
For DTC P0128: If the thermostat has been serviced, ensure it is the correct thermostat for the engine and that it is seated properly in the housing, with the correct gasket. Be sure the coolant is the correct mixture. Be sure the cooling system has been properly purged of air.
When the engines are manufactured, the thermostats are staked into place. When servicing the thermostat remember to grind down the stake (or change the housing) to make sure the staking is not in the way, Otherwise the thermostat won't seat properly and the system will interpret this as a thermostat malfunction.
If the vehicle operator describes, or the technician experiences, any of the Symptom/Conditions, perform the Repair Procedure.
PARTS REQUIRED:
Use the table to cross reference the correct replacement part number PCM to order for the vehicle.
EQUIPMENT REQUIRED:
REPAIR PROCEDURE:
NOTE:
WHENEVER A PCM/TCM IS REPLACED OR REPROGRAMMED, THE SOFTWARE IN THE CONTROLLER AND DRBIII(R) MUST BE VERIFIED AS HAVING THE LATEST REVISION LEVEL.
1. Replace the PCM with the appropriate part number from the chart shown above. Refer to the service information available in TechCONNECT/MDS2 or the 2002 LHS/300M/Intrepid/Concorde Service Manual (Publication No. 81-270-02027) page 8E-28.
NOTE:
THE FOLLOWING STEP IS REQUIRED BY LAW.
2. Type the necessary information on the "Authorized Modification Label" p/n 04275086AB and attach near the VECI label (Fig. 1).
3. Perform the Powertrain Verification Test VER-2. Refer to the service information available in TechCONNECT/MDS2 or the 2002 LHS/300M/Intrepid/Concorde Powertrain Diagnostic Procedures Manual (Publication No. 81-270-02008) page 325.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE: