Intrepid V6-3.5L VIN G (2002)
Engine Control Module: Customer Interest
Engine Controls - Erroneous MIL/DTC's
NUMBER: 18-017-03
GROUP: 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.