P0135 P0135 O2 Sensor Heater Circuit
What P0135 means for you
The O2 sensor heater circuit malfunction can lead to increased emissions and poor engine performance.
Symptoms
- The check engine light will illuminate, indicating a problem.
- The vehicle may experience rough idling or running conditions.
- Fuel efficiency may decrease.
- In some cases, the engine may stall unexpectedly.
- Black smoke or a foul odor may emanate from the exhaust.
- Occasionally, the driver may not notice any significant issues.
Common causes
- The primary cause of a P0135 code is a short or open circuit in the heater circuit of the oxygen sensor.
- Another potential cause is excessive current draw detected by the engine control module (ECM) when the vehicle starts.
- The oxygen sensor requires a specific temperature to function correctly, which is achieved through an internal heater. If this heater fails, the sensor cannot provide accurate readings.
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Send your ECUWhat this code means
The P0135 error code indicates a malfunction in the oxygen sensor heater circuit for bank 1, sensor 1. This code is triggered when the engine control module (ECM) identifies an issue with the heater circuit that is essential for the oxygen sensor to reach operational temperature quickly.
Frequently asked questions
It is not advisable to continue driving with a P0135 code, as it can lead to poor engine performance and increased emissions.
Repair costs for a P0135 code can vary, but typically range from $100 to $300, depending on whether the oxygen sensor needs replacement or if wiring issues are present.
If the oxygen sensor heater fails, the sensor may take longer to provide accurate readings, leading to engine performance issues and increased fuel consumption.
