QuestionI have a 2001 chrysler seabring 2.4 dohc and the check engine light keeps coming on and off with the error code P0172 which is o2 rich bank one and I have replaced the plugs, wires, coil, both upper and lower o2 sensors. What else could this be? changing all this had no chages on the car and that is the only code that comes on. The symptoms of the car are: Hard starting, sputtering around 60mph, and occasionally stalling after driving for awhile, but starts right up after, but has only done that a few times.
Also the odometer keeps dinging and saying DECK. do you know what this means? Thanks Michael
AnswerSymptom List:
P0172-1/1 FUEL SYSTEM RICH
P0175-2/1 FUEL SYSTEM RICH
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0172-1/1 FUEL SYSTEM RICH.
When Monitored and Set Condition:
P0172-1/1 FUEL SYSTEM RICH
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above 20 deg. F and altitude below 8000 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive and
the result is below a certain value for two trips, a freeze frame is stored, the MIL
illuminates and a trouble code is stored.
P0175-2/1 FUEL SYSTEM RICH
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above 20 deg. F and altitude below 8000 ft.
Set Condition: If the PCM multiplies short term compensation by long term adaptive and
the result is below a certain value for two trips, a freeze frame is stored, the MIL
illuminates and a trouble code is stored.
POSSIBLE CAUSES
INTERMITTENT CONDITION
O2 SENSOR HEATER OPERATION
O2 SENSOR
EVAP PURGE SOLENOID OPERATION
O2 SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
O2 SENSOR SIGNAL CIRCUIT OPEN
TPS VOLTAGE GREATER THAN 0.92 VOLTS WITH THROTTLE CLOSED
TP SENSOR SWEEP
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR (HIGH)
PCM
