P2195 – O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)
Description
The ECM detects the upstream O2 sensor stuck lean on Bank 1.
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View Recommended ScannersSymptoms
- Rough idle
- Hesitation
- Poor acceleration
- High fuel trims
Causes
- Faulty O2 sensor
- Vacuum leaks
- Exhaust leaks
- Fuel delivery issues
Diagnosis
- Monitor O2 data
- Check fuel trims
- Inspect vacuum lines
- Smoke test
Repair
- Replace O2 sensor
- Fix vacuum leaks
- Repair exhaust leaks
- Check fuel system
