Diagnostic Aids
WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition on, with engine off. MAP sensor voltage signal should be 4.5-4.8 volts. Compare this reading with a known-good vehicle with same style MAP sensor. Voltage readings should be within .4 volt of each other. Ensure vacuum source to MAP sensor is free of restrictions. DTC P0105 may also set if the following conditions exist.
- Incorrect cam timing
- Restricted exhaust
- Worn piston rings
- Low fuel pressure