P0135
GENERIC DTC · Emissions electrical
Oxygen sensor heater circuit fault — bank 1 sensor 1
Ce que le code signifie
The controller detected an electrical or performance fault in the specified heater circuit.
Gravité et conduite
Service soon
Causes possibles
- Open heater element
- Wiring or connector damage
- Fuse/power supply issue
- Controller driver fault
Prochaines vérifications
- Do not test live wiring without correct service information
- Inspect only visible harness damage with vehicle off
- Use model-specific wiring and electrical tests
Source et limite
Code structure follows SAE J2012. Manufacturer-specific definitions, pinpoint tests, wiring, torque, fluids, and repair procedures require authoritative information for the exact vehicle.
SAE J2012 Diagnostic Trouble Code DefinitionsReviewed 2026-08-13