Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
Common Symptoms
- Check engine light illuminated
- Poor acceleration or lack of power
- Rough idle or stalling
- Black smoke from exhaust
- Poor fuel economy
- Engine may fail to start or start hard
Most Likely Root Causes
- Faulty MAP sensor
- Damaged or corroded MAP sensor wiring or connector
- Vacuum leak at MAP sensor hose or connection
- Shorted MAP sensor signal wire to ground
- Failed PCM/ECM (rare)
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Component Location
The MAP sensor is typically mounted on the intake manifold or connected to it via a vacuum hose, often near the throttle body.
Manufacturer Notes
Some vehicles may set this code during extreme altitude changes or if aftermarket intakes alter MAP sensor vacuum reference.
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