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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 86 (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 Balance >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  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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