|
|
Symptom List: P0171-FUEL SYSTEM 1/1 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 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 POSSIBLE CAUSES GOOD TRIP EQUAL TO ZERO RESTRICTED FUEL SUPPLY LINE FUEL PUMP INLET STRAINER PLUGGED FUEL PUMP MODULE O2 SENSOR O2 SIGNAL CIRCUIT O2 RETURN CIRCUIT O2 SENSOR HEATER OPERATION THROTTLE POSITION SENSOR VOLTAGE GREATER THAN 0.92 VOLTS WITH THROTTLE THROTTLE POSITION SENSOR SWEEP MAP SENSOR ECT SENSOR ENGINE MECHANICAL PROBLEM FUEL FILTER/PRESSURE REGULATOR (HIGH) PCM 101 DRIVEABILITY - NGC |