Audi DTC P1135 – O2 Sensor Heating Circuit, Bank1+2-Sensor2 Electrical Malfunction
DTC P1135 meaning on Audi
DTC P1135 indicates an O2 Sensor Heating Circuit, Bank1+2-Sensor2 Electrical Malfunction in an Audi vehicle. This fault code specifically points to an issue with the heating circuit of the downstream oxygen sensor on bank 1 and bank 2 in the exhaust system.
Audi DTC P1135 symptoms
Symptoms of DTC P1135 in an Audi may include poor engine performance, decreased fuel efficiency, rough idling, and an illuminated Check Engine Light on the dashboard. Additionally, the vehicle may fail emissions tests due to increased emissions output.
Audi DTC P1135 causes
The common causes of DTC P1135 in an Audi include a faulty downstream oxygen sensor, damaged wiring or connectors in the sensor circuit, a blown fuse related to the sensor heating circuit, or a malfunctioning engine control module (ECM).
Audi DTC P1135 seriousness
While DTC P1135 may not cause immediate drivability issues, it is important to address this fault code promptly to prevent potential long-term damage to the vehicle’s engine and emissions system. Ignoring this fault can lead to increased emissions, reduced fuel efficiency, and potential catalytic converter damage.
How to diagnose DTC P1135 on Audi
To diagnose DTC P1135 on an Audi, a mechanic would typically start by using an OBD-II scanner to retrieve the fault code and perform a visual inspection of the downstream oxygen sensor and its wiring. They may also test the sensor’s heating circuit for continuity and check for any blown fuses related to the sensor.
How to fix DTC P1135 on Audi
Fixing DTC P1135 on an Audi usually involves replacing the downstream oxygen sensor, repairing any damaged wiring or connectors in the sensor circuit, and ensuring that the sensor’s heating circuit is functioning properly. In some cases, resetting the ECM may also be necessary to clear the fault code.
How to erase DTC P1135 on Audi
To erase DTC P1135 on an Audi, the fault code can be cleared using an OBD-II scanner or by disconnecting the vehicle’s battery for a few minutes. However, it is important to address the underlying issue causing the fault code before clearing it to prevent it from reoccurring.
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