P0105
Manifold Absolute Pressure / Barometric Pressure Circuit Malfunction
The ECU detects a general electrical malfunction in the manifold absolute pressure (MAP) or barometric pressure sensor circuit. Signal missing, implausible, or wiring broken. Generic fault when no more specific MAP code applies.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- MAP sensor failedCommon
- Vacuum hose to MAP sensor cracked or disconnectedPossible
- MAP wiring or connector faultPossible
Parts involved
- MAP Sensor
- Barometric Pressure Sensor
- MAP Wiring
- Vacuum Hose
P0105 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.