P0135
O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
Free on OBD DashX
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What P0135 means
- The fault code P0135 indicates that there is an issue with the circuit that controls the heater for the oxygen sensor 1 in bank 1. This may cause the vehicle's emission system to perform poorly or not at all.
Possible symptoms
- Illuminated check engine light
- Poor fuel economy
- Failed emissions test
- Rough idle or stalling
- Reduced engine power or acceleration
Possible causes
- Failed oxygen sensor
- Faulty wiring or connections in the circuit
- Failed engine control module (ECM)
- Failed fuse or relay
Related parts
- Oxygen Sensor: This is one of the parts that fails very commonly. It measures the amount of oxygen to ensure proper combustion. Problems in the Oxygen Sensor lead to poor fuel economy
Possible solutions
- Replace the oxygen sensor
- Check and repair any damaged wiring or connections
- Replace the engine control module (ECM) if necessary
- Check the fuse and relay associated with the oxygen sensor heater circuit
Free on OBD DashX
P0135 on OBD DashX
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