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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 1.4L (LUJ, LUV) - DTC P0300 To DTC P2635 And Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P219A: Fuel Trim Cylinder >> Circuit/System Testing

Circuit/System Testing

  1. Engine idling, verify the manifold absolute pressure (MAP) sensor parameter is between 20-48 kPa.
    • If not within the specified range  .

      Refer to DTC P0106 .

    • If within the specified range, verify that none of the conditions listed below exist: 
    • Modified, damaged, leaking or restricted air induction system components.
    • Improper operation of the crankcase ventilation system.
    • Split, kinked or improperly connected vacuum hoses.
    • Restricted, damaged, leaking or modified exhaust system from the catalytic converter forward. Refer to Symptoms - Engine Exhaust .
    • Improperly operating fuel injectors. Refer to Fuel Injector Diagnosis .
    • Contaminated fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
    • Excessive fuel in the crankcase due to leaking injectors. Change engine oil as necessary.
    • Improper ignition system operation. Refer to Electronic Ignition System Diagnosis .
    • If a condition is found 

      Repair as necessary.

    • If no condition is found 
  2. Test the engine for any mechanical conditions such as sticking valves, lifters, etc., which could alter the flow into the combustion chamber. Refer to Symptoms - Engine Mechanical .
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