OBD-II code · Network
U0156 Lost Communication with Information Center "A"
The Information Center "A" has stopped transmitting on the vehicle data bus, so other control units no longer receive its messages. The driver-information display loses data and may go blank. Typical causes are loss of power or ground at the module, an open or shorted CAN/LIN bus wire, a connector fault, or an internal module failure.
Is it safe to drive with U0156?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyHead unit unpowered
- PossibleCAN wiring to head unit broken
- Less likelyGateway module routing CAN messages incorrectly
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
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Information Display Module, Can Bus Wiring
Related codes
- U0153Lost Communication with Restraints Control Module B
- U0154Lost Communication with Restraints Occupant Sensing Module
- U0155Lost Communication with Instrument Panel Cluster
- U0157Lost Communication with Personalization Control Module
- U0158Lost Communication with Head Up Display
- U0159Lost Communication with Parking Assist Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.