How to Solve the P0171 Fuel System Too Lean Issue in Cruze?

1 Answers
Vickie
07/30/25 2:11am
p0171 fuel system too lean indicates that the engine's oxygen sensor detects incomplete combustion of gasoline, with too much air and too little fuel. It is recommended to check the intake system for air leaks and immediately locate the nearest repair facility for further inspection. Continued driving may result in loss of acceleration, increased fuel consumption, and in more severe cases, engine stalling. Below are possible causes for the P0171 fuel system too lean issue: 1. Fuel contamination; missing, blocked, or leaking components in the exhaust system. 2. Faulty fuel injector; insufficient fuel in the tank. 3. Low fuel pressure; vacuum leaks in the intake manifold, throttle body, or injector O-rings.
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