Network, generic

U0294 Lost Communication With Powertrain Control Monitor Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Software of the monitoring or main controller (incl. cold-start behaviour)
Supply, ground or wake-up of the monitoring module faulty
Bus wiring or connector to the monitoring module damaged
Monitoring module internally failed

Symptoms

  • Wrench or drive system warning lamp
  • Reduced power or limp home
  • Gear selection refused, especially in cold weather

Repair estimate

DifficultyHardWorkshop job
Parts and labour€0–2,000
Time0.5–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

powertrain monitor modulevehicle bus wiring

Related codes

U0595U0100U0115P060A

References: performanceparts.ford.com, fordservicecontent.com, static.nhtsa.gov.