Manifold Absolute Pressure Sensor Low Input
The MAP sensor reports a pressure below the lower threshold the ECU expects at any engine state. Typically indicates a hard electrical fault rather than a slow drift.
Affected components
- Map sensor
- Map sensor wiring
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: MAP sensor failed
- Low likelihood: 5V reference voltage missing
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.