What the P1108 code means?
A code P1108 will be stored when the Manifold Absolute Pressure (MAP) or BARO sensor sends the ECM a higher than normal voltage signal. The MAP sensor is used to read the incoming air charge to an engine. When the BARO sensor reports a voltage higher than predetermined manufacturer parameters, a code can be stored.
What causes the P1108 code?
1. Failed Manifold Pressure Sensor.
2. ECU or Powertrain Control Module is faulty.
3. Bad PCM or ECU software revision.
What are the symptoms of the P1108 code?
1. Engine Light ON.
2. Engine rough idle.
3. Engine hesitation.
Common mistakes when diagnosing the P1108 code:
At times, it is possible to believe the MAP or BARO sensors are the culprit of a P1108 code, however before replacing these more expensive components, it is recommended to seek the assistance of a professional to fully diagnose wiring and electrical circuitry for possible damage and repair prior to sensor replacement.
What repairs can fix the P1108 code?
1. Repair any damaged, corroded, open, or shorted electrical wiring and related connectors.
2. Fully repair any engine misfire codes, manifold air pressure (MAP) codes, or mass airflow codes.
3. Repair any MAF system circuitry issues.
4. Repair unmetered air coming into the engine or an insufficient air supply.
5. Repair or replace clogged air filter.
6. Repair or replace damaged or defective air inlet pipe.
7. Clear any clogged catalytic converter(s).
8. Repair any vacuum leaks or replace damaged or defective hoses.
9. Replace damaged or defective MAP sensor.