OBD-II code · Network
U0253 Lost Communication With Accessory Protocol Interface Module
The vehicle bus reports loss of communication with the accessory protocol interface module (APIM). Infotainment, voice control and connected services that route through APIM stop responding.
Is it safe to drive with U0253?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBus wiring open or shorted
- PossibleModule without power or ground
- PossibleModule failed
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
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Accessory Protocol Interface Module, Vehicle Bus Wiring
Related codes
- U0250Lost Communication With Impact Classification System Module
- U0251Lost Communication With Running Board Control Module B
- U0252Lost Communication With Lighting Control Module Rear B
- U0254Lost Communication With Remote Start Module
- U0255Lost Communication With Front Display Interface Module
- U0256Lost Communication With Front Controls Interface Module A
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.