U011A
Lost Communication With Exhaust Gas Sensor Module A
U011A is an OBD-II diagnostic trouble code meaning: Lost Communication With Exhaust Gas Sensor Module A. Common causes: open or short circuit in the module power supply circuit, damage to the can bus wiring harness. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Reduced engine power
- Deteriorating fuel economy
- Possible problems starting the engine
- Unstable idling
Causes
- Open or short circuit in the module power supply circuit
- Damage to the CAN bus wiring harness
- Malfunction of the exhaust gas sensor module itself
- Corrosion or poor contact in connectors
- Problems with module power or grounding
How to Fix
- Check the integrity of the wiring harness and module connectors
- Check the supply voltage and module ground
- Scan the module for additional fault codes
- If necessary, replace the exhaust gas sensor module
- Clear error codes and test drive to check
Related codes
Error U011A by Vehicle Brand
FAQ
What does the U011A code mean?
U011A is an OBD-II diagnostic trouble code that indicates: Lost Communication With Exhaust Gas Sensor Module A
What causes a U011A error code?
The most common causes of U011A include: Open or short circuit in the module power supply circuit; Damage to the CAN bus wiring harness; Malfunction of the exhaust gas sensor module itself; Corrosion or poor contact in connectors.
How do I fix a U011A diagnostic trouble code?
To fix U011A: Check the integrity of the wiring harness and module connectors. Check the supply voltage and module ground. Scan the module for additional fault codes. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U011A?
Yes, but get it checked soon
How much does it cost to fix U011A?
The estimated repair cost for U011A is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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