Chrysler 300M 2002 Service Manual page 2533

DRIVEABILITY - NGC
Symptom List:
P0171-FUEL SYSTEM 1/1 LEAN
P0174-FUEL SYSTEM 2/1 LEAN
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0171-FUEL SYSTEM 1/1 LEAN.
When Monitored and Set Condition:
P0171-FUEL SYSTEM 1/1 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above 20 deg. F and altitude below 8500 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive and
a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates
and a trouble code is stored.
P0174-FUEL SYSTEM 2/1 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above 20 deg. F and altitude below 8500 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive and
a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates
and a trouble code is stored.
INTERMITTENT CONDITION
RESTRICTED FUEL SUPPLY LINE
FUEL PUMP INLET STRAINER PLUGGED
FUEL PUMP MODULE
O2 SENSOR
O2 SENSOR SIGNAL CIRCUIT
O2 SENSOR HEATER OPERATION
O2 SENSOR RETURN CIRCUIT
THROTTLE POSITION SENSOR VOLTAGE GREATER THAN 0.92 VOLTS WITH THROTTLE
CLOSED
THROTTLE POSITION SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR (HIGH)
POSSIBLE CAUSES
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