U011A

Lost Communication With Exhaust Gas Sensor Module A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

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

U0115 U0116 U0118