Code result
P0109
Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
Moderate severity
What it means
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.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
MAP connector loose or corroded
highOne of the most commonly reported causes for this code — check this first.
Sensor fails when hot
mediumA plausible cause — test and verify before replacing parts.
Wiring chafed or pinched
mediumA plausible cause — test and verify before replacing parts.
Related help
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