Common Symptoms
- Check Engine Light illuminated
- Poor engine performance at higher altitudes
- Rough idle or stalling
- Reduced fuel economy
- Black smoke from exhaust under acceleration
- Hard starting in certain conditions
Most Likely Root Causes
- Faulty barometric pressure sensor
- Damaged or corroded wiring to the BARO sensor
- Short to ground in sensor circuit
- Water or moisture intrusion in sensor connector
- Failed engine control module
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Component Location
The barometric pressure sensor is typically integrated into the ECM/PCM or mounted separately on the intake manifold or firewall area.
Manufacturer Notes
Some manufacturers integrate the barometric pressure sensor into the MAP sensor or ECM rather than using a standalone component.
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