Severity: Fix right away. Driving risks expensive damage or a breakdown.
Another module in the car cannot talk to the engine computer over the data network, which usually means a wiring or power problem.
Check fuses and wiring first, then have a shop trace the network fault.
The car may stall, fail to start, or lose functions. Get it diagnosed with a scan tool.
Avoid driving until it is checked — towing is the safer choice. The car may stall, fail to start, or lose functions. Get it diagnosed with a scan tool.
The most common causes are: Damaged data wiring; Blown fuse; Failing engine computer; Corroded connector. A scan tool and a visual check of the parts above is where a technician starts.
Check fuses and wiring first, then have a shop trace the network fault.
