Audi DTC P1190 – Linear 02 Sensor / Reference Voltage Incorrect Signal
DTC P1190 meaning on Audi
DTC P1190 on an Audi indicates that there is an issue with the Linear O2 Sensor or Reference Voltage Incorrect Signal. This fault code is specifically related to the oxygen sensor and its reference voltage signal not being within the expected range.
Audi DTC P1190 symptoms
Symptoms of DTC P1190 on an Audi may include:
- Check Engine Light (MIL) illuminated
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
Audi DTC P1190 causes
Common causes of DTC P1190 on an Audi include:
- Faulty oxygen sensor
- Wiring or connector issues in the oxygen sensor circuit
- Issues with the reference voltage supply
- ECU (Engine Control Unit) malfunction
Audi DTC P1190 seriousness
DTC P1190 should not be ignored as it can lead to poor engine performance and increased emissions. While the vehicle may still be operable with this fault, it is recommended to address it promptly to prevent further damage and ensure optimal engine operation.
How to diagnose DTC P1190 on Audi
To diagnose DTC P1190 on an Audi, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault code and freeze frame data
- Inspect the oxygen sensor and its wiring for any visible damage or corrosion
- Check the reference voltage supply to the sensor
- Perform a voltage test on the sensor to ensure it is functioning correctly
- Inspect the ECU for any signs of malfunction
How to fix DTC P1190 on Audi
To fix DTC P1190 on an Audi, the following steps may be taken:
- Replace the faulty oxygen sensor if it is determined to be the cause
- Repair any damaged wiring or connectors in the sensor circuit
- Ensure the reference voltage supply is stable and within specifications
- If the ECU is found to be faulty, it may need to be reprogrammed or replaced
How to erase DTC P1190 on Audi
After the issue causing DTC P1190 on an Audi has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and allow the vehicle’s ECU to monitor the system for any new faults.
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