Volkswagen DTC P1118 – O2S Sensor Heater Circuit Open Bank 1 Sensor 2
DTC P1118 meaning on Volkswagen
DTC P1118 on a Volkswagen indicates an issue with the O2S (Oxygen Sensor) Sensor Heater Circuit Open for Bank 1 Sensor 2. This means that the heating element in the oxygen sensor located downstream of the catalytic converter in bank 1 is not functioning properly.
Volkswagen DTC P1118 symptoms
Symptoms of DTC P1118 in a Volkswagen may include:
- Check Engine Light illuminated on the dashboard
- Poor fuel economy
- Engine running rough or misfiring
- Increased emissions
Volkswagen DTC P1118 causes
The common causes of DTC P1118 on a Volkswagen are:
- Faulty oxygen sensor heater circuit
- Open or short circuit in the wiring of the oxygen sensor heater
- Defective oxygen sensor
- Issues with the engine control module (ECM)
Volkswagen DTC P1118 seriousness
While DTC P1118 may not cause immediate drivability issues, it can lead to poor engine performance, increased emissions, and potential damage to the catalytic converter over time if left unresolved. It is recommended to address this issue promptly to prevent further complications.
How to diagnose DTC P1118 on Volkswagen
To diagnose DTC P1118 on a Volkswagen, you can follow these steps:
- Use an OBD-II scanner to retrieve the fault code and verify the specific details of the code.
- Inspect the wiring and connectors related to the oxygen sensor heater circuit for any visible damage or corrosion.
- Test the resistance of the oxygen sensor heater using a multimeter to determine if it is within the specified range.
- Check the power and ground connections to the oxygen sensor to ensure proper voltage supply.
How to fix DTC P1118 on Volkswagen
To fix DTC P1118 on a Volkswagen, you can consider the following solutions:
- Replace the faulty oxygen sensor with a new, OEM-quality sensor.
- Repair any damaged wiring or connectors in the oxygen sensor heater circuit.
- Check and repair any issues with the engine control module (ECM) if necessary.
- Clear the fault code and reset the Check Engine Light after completing the repairs.
How to erase DTC P1118 on Volkswagen
To erase DTC P1118 on a Volkswagen, you can use an OBD-II scanner to clear the fault code from the vehicle’s ECM memory. After addressing the underlying issue causing the fault code, you can reset the Check Engine Light by erasing the code and performing a drive cycle to ensure the repair was successful.
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