P1100moderate severityPowertrain
BARO Sensor Circuit
on 2004 Toyota MR2 1.8L I4 · FWD
What this code means
The BARO sensor circuit is reporting an abnormal signal to the ECM for atmospheric pressure measurement.
Symptoms
- CEL
- Poor fuel economy
- Rough idle
- Hesitation
Common causes
- Faulty BARO sensor
- Open/short in circuit
- Poor connection
- Faulty ECM
Diagnostic steps
- Read freeze frame data
- Test BARO sensor output
- Inspect wiring
- Check ECM
Repair notes
Replace BARO sensor or repair wiring.
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