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Home >> GMC >> 2020 >> Terrain Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Controls And Fuel - 1.5L (LYX) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P050D >> Circuit/System Testing

Circuit/System Testing

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  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

    • Go to next step: If the fuel pressure is OK 
  2. Verify that the fuel is not contaminated - Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
    • Go to next step: If the fuel is not contaminated 
  3. Replace fuel injectors as indicated by high misfire counts.
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