P2195 – O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)
Description
The ECM detects the upstream O2 sensor stuck lean on Bank 1. Compare the sensor signal with fuel trims and other live data before replacing the sensor.
Need More Than Just the Fault Code?
A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.
Compare Diagnostic 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
