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P2195 - O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1)
DTC DESCRIPTION P2195 - O2 SENSOR SIGNAL BIASED/STUCK LEAN (BANK 1 SENSOR 1)
| Description: |
The universal heated oxygen sensor (HO2S) indicating lean at the end of a test is trying to correct for an over lean condition. This DTC sets when the fuel control system no longer detects switching for a calibrated amount of time. |
| Possible Causes: |
- Universal HO2S harness short to voltage
- Water in the harness connector
- UO2SPC circuit open
- Low fuel pressure or running out of fuel
- EVAP purge valve stuck open
- Biased MAP sensor signal
- Incorrect learned ethanol content
- Contaminated MAF sensor
- Air leaks after the mass airflow (MAF) sensor
- Vacuum leaks
- Leaking positive crankcase ventilation (PCV) system
- Incorrectly seated engine oil dipstick
- Leaking EGR gasket
- Camshaft timing
- Exhaust leaks before or near the universal HO2S
- Corrosion
- Incorrect connections
- Damaged universal HO2S
|
| Diagnostic Aids: |
|
| Application |
Key On Engine Off |
Key On Engine Running |
Continuous Memory |
| All |
GO to Pinpoint Test H
. |