P1198 – Audi DTC

Audi DTC P1198 – O2 Sensor Heater Circuit, Bank1-Sensor2 Electrical Malfunction

DTC P1198 meaning on Audi

The DTC P1198 code on an Audi indicates an O2 sensor heater circuit malfunction in Bank 1, Sensor 2. This means that the heating element in the downstream oxygen sensor located after the catalytic converter on the bank 1 side of the engine is not functioning properly.

Audi DTC P1198 symptoms

Common symptoms of a DTC P1198 code on an Audi may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Decreased fuel efficiency
• Engine running rough or misfiring
• Increased emissions

Audi DTC P1198 causes

The potential causes of a DTC P1198 code on an Audi can include:

• Faulty O2 sensor heater circuit
• Wiring or connector issues in the O2 sensor heater circuit
• Blown fuse related to the O2 sensor heater circuit
• Internal ECM (Engine Control Module) fault

Audi DTC P1198 seriousness

While a DTC P1198 code may not cause immediate drivability issues, it can lead to decreased fuel efficiency and increased emissions. Ignoring this code can potentially cause damage to the catalytic converter over time.

How to diagnose DTC P1198 on Audi

To diagnose a DTC P1198 code on an Audi, a mechanic may perform the following steps:

1. Use an OBD-II scanner to retrieve the specific fault code
2. Inspect the wiring and connectors in the O2 sensor heater circuit
3. Check the fuse related to the O2 sensor heater circuit
4. Test the O2 sensor heater element for proper function
5. Check for any internal ECM faults

How to fix DTC P1198 on Audi

To fix a DTC P1198 code on an Audi, the following steps may be taken:

1. Replace the faulty O2 sensor if the heater circuit is defective
2. Repair or replace any damaged wiring or connectors in the O2 sensor heater circuit
3. Replace any blown fuses related to the O2 sensor heater circuit
4. If an internal ECM fault is detected, the ECM may need to be repaired or replaced

How to erase DTC P1198 on Audi

After the issue causing the DTC P1198 code on an Audi has been fixed, the code can be cleared using an OBD-II scanner. This will reset the Check Engine Light and erase the diagnostic trouble code from the vehicle’s memory.

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