243
UnclassifiedFuel
What This Code Means
Adaptive multiplier out of range (greater than 30%); Lean exhaust condition; False lean condition; Fuel system running lean
Possible Causes
- •Heated oxygen sensor wires mis-routed and contacting exhaust manifold
- •Large vacuum leaks
- •Crankcase leaks
- •Injector driver or driver circuit fails open
- •Injector fails in a closed manner or is dirty
- •Low fuel pressure
- •Faulty fuel injector
- •Damaged fuel pump assembly
- •Exhaust leak
- •Contaminated or spoiled fuel
- •Poor ECM ground
Suggested Actions
- 1If any other DTCs are present, diagnose those first
- 2Ensure ECM grounds are connected to a good battery or engine ground
Related Power Solutions, Inc. Fault Codes
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