U010B
UNetworkLost Communication With EGR Control Module B
What does this code mean?
Severity : MediumU010B reports lost communication with EGR control module "B" on the vehicle network. Some engines use a small dedicated module to drive a second EGR valve. The exact meaning depends on the manufacturer and on how the engine is set up.
Symptoms
- Check engine light on.
- Loss of power or limp mode.
- Rough idle.
- Other EGR or network codes stored.
Possible causes
- Corroded or unplugged EGR module B connector.
- Open or shorted communication wiring.
- Faulty power supply or ground to the module.
- Failed EGR module B or integrated valve.
- General CAN network fault.
Diagnosis and repair
- Read all codes and check whether other modules have also lost communication.
- Inspect the EGR module B connector and wiring.
- Check power, ground and CAN lines with a multimeter.
- Replace the module or valve if the wiring is sound.
- Clear the code and road test.
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Code
U010B
Category
Network
Prefix
U
Standard
OBD-II / SAE J2012