What does code P0109 mean?
The MAP or barometric sensor signal is intermittent; the ECU receives unstable pressure readings.
OBD-II Code
P0109 — Manifold Absolute Pressure or Barometric Pressure Circuit Intermittent
The MAP or barometric sensor signal is intermittent; the ECU receives unstable pressure readings.
Common symptoms
- Intermittent hesitation
- sudden changes in engine response
- unstable idle
Possible causes
- Intermittent connector contact
- partially broken wiring
- failing MAP sensor
Initial recommendation
Secure connector, inspect wiring harness and replace sensor if readings continue to fluctuate.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine code P0109 with your vehicle's actual symptoms for more complete diagnostic guidance.
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