U0294Lost Communication With Powertrain Control Monitor Module
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- A powertrain control monitor module is a separate supervisor that recalculates torque, speed or driver demand and checks whether the main controller's commands stay within safe limits. U0294 is stored when that supervisor stops communicating, so the plausibility layer is missing. Ford's 2014 code list includes it lighting only the wrench symbol, never the MIL. Within one controller the same idea appears in Ford's 2024 throttle monitor, which compares main and monitoring processor and lights wrench lamp and MIL on faults. Audi's bulletin index lists U029400 for the 2025 Q6 and SQ6 e-tron, where no gear can be selected in cold weather together with U3035 and U0129, and for 3.0 V6 TFSI models with a drive system fault; the module meaning is not public. Expect reduced power or limp home.
- What you may notice
- Wrench or drive system warning lamp
- Reduced power or limp home
- Gear selection refused, especially in cold weather
- Likely causes
- LikelySoftware of the monitoring or main controller (incl. cold-start behaviour)
- PossibleSupply, ground or wake-up of the monitoring module faulty
- PossibleBus wiring or connector to the monitoring module damaged
- RareMonitoring module internally failed
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.