P0175

Tests 1 - 2:

Tests 3 - 6:

Tests 7 - 8:

Tests 9 - 10:

Tests 11 - 12:

SYMPTOM
P0175 2/1 FUEL SYSTEM RICH

WHEN MONITORED
With the engine running in closed loop mode, the ambient/battery temperature above 20 °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
- TPS voltage change not smooth
- TPS voltage < 0.92 V
- ECT sensor (out of calibration)
- MAP sensor (out of calibration)
- Engine mechanical problem
- Fuel filter/pressure regulator (high)
- Fuel filter/pressure regulator (low)
- Fuel pump capacity (volume) out of specs
- Fuel pump (low output)