1161
UnclassifiedFuel
What This Code Means
Malfunction Indicator Lamp (MIL) ON; Adaptive multiplier out of range greater than 30% while running on propane; Lean exhaust condition (especially at light load); Fuel system running lean; False lean condition; One bank shows high adaptive and the other is low
Possible Causes
- •Adaptive multiplier exceeds the limits of normal operation
- •Oxygen sensor wires mis-routed and contacting hot parts (exhaust manifold, pipes, etc.) causing damage
- •Large vacuum leaks
- •Crankcase leaks
- •Faulty EPR (Electronic Pressure Regulator)
- •Faulty fuel mixer
- •Low fuel pressure
- •Faulty fuel regulator
- •Contaminated fuel filter
- •Exhaust leak allowing outside air to be pulled past the O2 sensor
- •Contaminated or spoiled fuel
- •ECM grounds not clean, tight, or in the proper location
- •Crossed O2 sensor leads
Suggested Actions
- 1Run fuel system diagnostic checks
- 2Inspect and correct routing of oxygen sensor wires to prevent contact with hot parts
- 3Inspect and repair vacuum leaks and crankcase leaks
- 4Inspect and repair/replace faulty EPR (Electronic Pressure Regulator) or fuel mixer
- 5Verify fuel pressure, check fuel regulator, or replace contaminated fuel filter
- 6Inspect and repair exhaust leaks
- 7Check and replace contaminated or spoiled fuel
- 8Clean, tighten, and properly position ECM grounds
- 9Trace crossed O2 sensor wires back to the ECM and correct them
Related Power Solutions International Fault Codes
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