OBD-II code · Network
U010A Lost Communication With Exhaust Gas Recirculation Control Module A
ECU has lost CAN communication with the EGR control module A. A communication loss with this module breaks any function relying on its data — diagnostic tools may show 'no response' and dependent modules can fall into limp mode.
Is it safe to drive with U010A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyModule unpowered
- Less likelyGateway module routing CAN messages incorrectly
- Less likelyCAN terminating resistor (120 Ω) drifted out of spec
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Egr Module A, Can Bus
Related codes
- U010BLost Communication With Exhaust Gas Recirculation Control Module B
- U0107Lost Communication with Throttle Actuator Control Module
- U0108Lost Communication With Alternative Fuel Control Module
- U0109Lost Communication with Fuel Pump Control Module
- U010CLost Communication With Turbocharger/Supercharger Control Module A
- U010DLost Communication With Turbocharger/Supercharger Control Module B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.