Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
Common Symptoms
- Check Engine Light illuminated
- Rough or unstable idle
- Poor acceleration and lack of power
- Engine stalling or hesitation during acceleration
- Poor fuel economy
- Black smoke from exhaust under load
Most Likely Root Causes
- Faulty MAP sensor
- Vacuum leak at intake manifold or hoses
- Clogged or restricted MAP sensor vacuum line
- Corroded or loose MAP sensor electrical connector
- Intermittent wiring issues in MAP sensor circuit
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Component Location
MAP sensor is typically mounted on the intake manifold or connected via a vacuum hose, often near the throttle body or upper intake.
Manufacturer Notes
Some vehicles require MAP sensor recalibration or ECM relearn procedure after replacement or repairs to intake system components.
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