Circuit/System Testing
WARNING: This page is about a different car, the 2017 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 (LF4)DTC P0106 (LGX) .
- If within the specified range
- If not 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 .