Symptom List:
P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN
P2097-DOWN STREAM FUEL SYSTEM 1/2 RICH
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P2096-DOWN STREAM FUEL
SYSTEM 1/2 LEAN.
When Monitored and Set Condition:
P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F, altitude below 8500 ft and fuel level greater than 15%.
Set Condition: If the PCM adds downstream short term compensation to 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.
P2097-DOWN STREAM FUEL SYSTEM 1/2 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 adds downstream short term compensation to 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.
POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
EXHAUST LEAK
ENGINE MECHANICAL PROBLEM
O2 SENSOR
O2 SIGNAL CIRCUIT
O2 RETURN CIRCUIT
FUEL CONTAMINATION
276
DRIVEABILITY - NGC
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