Chrysler Concorde 2004 Service Manual page 775

Symptom List:
P0172-FUEL SYSTEM 1/1 RICH
P0175-FUEL SYSTEM 2/1 RICH
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0172-FUEL SYSTEM 1/1 RICH.
When Monitored and Set Condition:
P0172-FUEL SYSTEM 1/1 RICH
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F and altitude below 8500 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive as
well as a purge fuel multiplier and the result is below a certain value for 30 seconds over
two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored.
P0175-FUEL SYSTEM 2/1 RICH
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20° and altitude below 8500 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive as
well as a purge fuel multiplier and the result is below a certain value for 30 seconds over
two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored.
GOOD TRIP EQUAL TO ZERO
O2 SENSOR HEATER OPERATION
O2 SENSOR
EVAP PURGE SOLENOID OPERATION
O2 SIGNAL CIRCUIT
O2 RETURN CIRCUIT
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR
PCM
POSSIBLE CAUSES
117
DRIVEABILITY - NGC