Powertrain
generic / SAE
P0109
Manifold Absolute Pressure / Barometric Pressure Circuit Intermittent
The ECU detects intermittent signal dropouts on the MAP/BARO sensor circuit. Fault is not constantly present — typically caused by loose connectors, chafed wiring, or a sensor failing under thermal load.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 09
Possible causes
- MAP connector loose or corroded high
- Sensor fails when hot medium
- Wiring chafed or pinched medium
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 40–200 €
- Estimated time: 0.5–2 h
- Component: map sensor
- Component: map connector
- Component: map wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012