Circuit/System Testing

WARNING: This page is about a different car, the 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Engine idling, transmission in Park or Neutral, verify the manifold absolute pressure (MAP) sensor parameter is between 20 - 48 kPa.
- If not within the specified range .
  Refer to DTC P0106 .
- Go to next step: If within the specified range, inspect for the conditions listed below:
- Modified, damaged, leaking, or restricted air induction system components.
- Improperly operating crankcase ventilation system. Refer to Crankcase Ventilation System Inspection/Diagnosis .
- 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 System Diagnosis .
- Fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
- Excessive fuel in the crankcase due to leaking injectors. Change engine oil as necessary.
- Improperly operating ignition system. Refer to Electronic Ignition System Diagnosis .
- If a condition is found
  Repair as necessary.
- Go to next step: If no condition is found
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 .