(P0175) Fuel System 2/1 Lean Control Below Limit (at Idle)

(P0175) FUEL SYSTEM 2/1 LEAN CONTROL BELOW LIMIT (AT IDLE)






When Monitored and Set Condition
^ When Monitored: With the engine running in closed loop mode, the ambient/battery temperature above -7 °C (20 °F), altitude below 2590 m (8500 ft). and fuel level greater than 15%.
^ Set Condition: If the PCM multiplies short term compensation by long term adaptive and a certain percentage is exceeded for two trips, the MIL illuminates and a trouble code is stored.

POSSIBLE CAUSES
RESTRICTED FUEL SUPPLY LINE
FUEL STRAINER PLUGGED
02 SENSOR SIGNAL CIRCUIT
02 SENSOR GROUND CIRCUIT
02 SENSOR HEATER OPERATION
MANIFOLD ABSOLUTE PRESSURE SENSOR OPERATION
ENGINE COOLANT TEMPERATURE SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
02 SENSOR
FUEL PUMP
FUEL CONTAMINATION/EXHAUST LEAK

Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on.
With the DRB III, read the PCM DTCs.
Is this DTC present?
Yes>> For complete diagnosis of this DTC, (P0172) Fuel System 1/1 Lean Control Below Limit (at Load)
No>> Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Note: Check connectors-Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

Note: Check for any Technical Service Bulletins that may apply.

Were there any problems found?
Yes>> Repair as necessary.
Perform Powertrain Verification Test - Ver 2
No>> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.