P1108 – Audi DTC

Audi DTC P1108 – O2 Sensor Heating Circuit, Bank2-Sensor1 Output too Low

DTC P1108 meaning on Audi

The Diagnostic Trouble Code (DTC) P1108 for Audi indicates an issue with the O2 sensor heating circuit in Bank 2, Sensor 1. This code specifically points to the O2 sensor located before the catalytic converter on the bank 2 side of the engine.

Audi DTC P1108 symptoms

Symptoms of DTC P1108 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 P1108 causes

Common causes of DTC P1108 on an Audi include:

• Faulty O2 sensor heating element
• Wiring or connector issues in the O2 sensor circuit
• ECU (Engine Control Unit) malfunction

Audi DTC P1108 seriousness

While DTC P1108 may not cause immediate drivability issues, it is important to address this problem promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

How to diagnose DTC P1108 on Audi

To diagnose DTC P1108 on an Audi, you can perform the following steps:

1. Use an OBD-II scanner to retrieve the fault code and confirm P1108.
2. Inspect the wiring and connectors related to Bank 2, Sensor 1 O2 sensor.
3. Test the O2 sensor heating element for proper resistance.
4. Check for any signs of physical damage or corrosion in the sensor and its connections.

How to fix DTC P1108 on Audi

To fix DTC P1108 on an Audi, you can try the following solutions:

1. Replace the Bank 2, Sensor 1 O2 sensor if the heating element is faulty.
2. Repair or replace any damaged wiring or connectors in the O2 sensor circuit.
3. If the ECU is suspected to be the issue, consult a professional for further diagnosis and repair.

How to erase DTC P1108 on Audi

To erase DTC P1108 on an Audi, you can:

1. Use an OBD-II scanner to clear the fault code after the underlying issue has been resolved.
2. Ensure that the repair has been successful by monitoring the system for any recurring fault codes.

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.