Error code
OBD2 P0158
OBD2P0158
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
O2 Sensor Circuit High Voltage.
Severity
moderateCan drive, but emissions performance may be compromised.
Summary
P0158 indicates high voltage in the heated oxygen sensor circuit for Bank 2 Sensor 2, which is located after the catalytic converter.
Symptoms
- Malfunction Indicator Light (MIL) illuminated
Common Causes
- Faulty heated oxygen sensor (HO2S)
- Wiring or connector damage
Diagnosis
- Check fuses and wiring for any obvious issues.
- Inspect the oxygen sensors for damage or corrosion.
- Verify proper seating of connectors with no bent pins.
- Use a multimeter to check circuit continuity and resistance.
Fixes
- Replace faulty heated oxygen sensor (HO2S).
FAQ
What does P0158 mean?
P0158 indicates high voltage in the heated oxygen sensor circuit for Bank 2 Sensor 2, which is used to monitor catalytic converter performance.
How do I fix P0158?
Fixing P0158 typically involves replacing a faulty heated oxygen sensor or repairing damaged wiring and connectors.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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