OBD-II code · Network (extended)
U3025 Control Module A Disable Circuit/Open
Open circuit on the control module A disable line — used by gateway/master to force the module into a safe-state when needed.
Is it safe to drive with U3025?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyDisable wire broken
- 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
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Module Disable A, Control Wiring
Related codes
- U3022Ignition Input Accessory/Off
- U3023Control Module Input Power Circuit A - Ignition Input On/Start Circuit Correlation
- U3024Control Module Input Power Circuit B - Ignition Input On/Start Circuit Correlation
- U3026Control Module A Disable Circuit Low
- U3027Control Module A Disable Circuit High
- U3028Control Module A Disable Feedback Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.