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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0446 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P050D: Cold Start Rough Idle >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Verify that the fuel pressure is not too low or too high. Refer to Fuel System Diagnosis .
    • If a condition is found 

      Repair or replace components as necessary

    • If a condition is not found 
  2. Verify that the fuel is not contaminated. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
    • If the fuel is not contaminated 
  3. Replace the appropriate fuel injectors as indicated by high misfire counts.
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