P1197 – Audi DTC

Audi DTC P1197 – O2 Sensor Heater Circuit, Bank2-Sensor1 Electrical Malfunction

DTC P1197 meaning on Audi

The DTC P1197 O2 Sensor Heater Circuit, Bank2-Sensor1 Electrical Malfunction on an Audi indicates that there is an issue with the electrical circuit of the oxygen sensor heater in bank 2, sensor 1. This fault code is specifically related to the heating element of the oxygen sensor, which is designed to reach operating temperature quickly for optimal performance.

Audi DTC P1197 symptoms

Common symptoms of the DTC P1197 on an Audi may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Decreased fuel efficiency
• Engine running rough or misfiring
• Reduced engine performance

Audi DTC P1197 causes

The potential causes of the DTC P1197 on an Audi can include:

• Faulty oxygen sensor heater
• Wiring or connector issues in the oxygen sensor circuit
• Blown fuse related to the oxygen sensor heater
• ECU (Engine Control Unit) malfunction

Audi DTC P1197 seriousness

While the DTC P1197 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 the issue can lead to increased fuel consumption and emissions, as well as potential damage to the catalytic converter.

How to diagnose DTC P1197 on Audi

Diagnosing the DTC P1197 on an Audi typically involves the following steps:

1. Use an OBD-II scanner to retrieve the fault code and freeze frame data
2. Inspect the wiring and connectors related to the oxygen sensor heater
3. Check the fuse for the oxygen sensor heater circuit
4. Test the oxygen sensor heater for proper resistance
5. Perform a visual inspection of the oxygen sensor for any physical damage

How to fix DTC P1197 on Audi

To fix the DTC P1197 on an Audi, you can consider the following steps:

1. Replace the faulty oxygen sensor heater
2. Repair any damaged wiring or connectors in the oxygen sensor circuit
3. Replace the blown fuse related to the oxygen sensor heater
4. If necessary, reprogram or replace the ECU

How to erase DTC P1197 on Audi

After addressing the underlying issue causing the DTC P1197 on an Audi, you can erase the fault code using an OBD-II scanner. Follow these steps:

1. Connect the OBD-II scanner to the vehicle’s diagnostic port
2. Access the scanner’s menu to clear the fault codes
3. Follow the on-screen prompts to erase the DTC P1197 code
4. Once the code is cleared, start the vehicle to ensure the CEL is no longer illuminated

Recommended tools for Audi diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.