Subaru OBD-II 1996 & Newer models DTC P1151 – Rear Oxygen Sensor Heater Circuit High Input
DTC P1151 meaning on Subaru OBD-II 1996 & Newer models
DTC P1151 indicates a high input in the rear oxygen sensor heater circuit of Subaru vehicles equipped with OBD-II systems from 1996 onwards.
Subaru OBD-II 1996 & Newer models DTC P1151 symptoms
- Check Engine Light (CEL) illuminated on the dashboard
- Poor fuel economy
- Reduced engine performance
Subaru OBD-II 1996 & Newer models DTC P1151 causes
- Faulty rear oxygen sensor
- Wiring or connector issues in the rear oxygen sensor heater circuit
- Defective oxygen sensor heater relay
Subaru OBD-II 1996 & Newer models DTC P1151 seriousness
The seriousness of DTC P1151 lies in its impact on engine performance and emissions. Ignoring this code can lead to increased fuel consumption and potential damage to the catalytic converter.
How to diagnose DTC P1151 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to retrieve the specific fault code
- Inspect the rear oxygen sensor and its wiring for any visible damage
- Check the oxygen sensor heater relay for proper operation
How to fix DTC P1151 on Subaru OBD-II 1996 & Newer models
- Replace the rear oxygen sensor if faulty
- Repair any damaged wiring or connectors in the heater circuit
- If the oxygen sensor heater relay is defective, replace it
How to erase DTC P1151 on Subaru OBD-II 1996 & Newer models
- Use an OBD-II scanner to clear the fault code
- Ensure the underlying issue causing DTC P1151 has been resolved
- Perform a test drive to verify the repair and check if the code reappears
Recommended tools for Subaru OBD-II 1996 & Newer models diagnostics
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Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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