Circuit/System Testing

WARNING: This page is about a different car, the 2016 Cadillac ATS. 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 .
- If within the specified range
Verify the conditions listed below do not exist:
- Modified, damaged, leaking, or restricted air induction system components.
- Vacuum leaks at the intake manifold, the throttle body, and the injector O-rings.
- 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 Injector Solenoid Coil Test .
- 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.
- 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 .