U0294

Lost Communication With Powertrain Control Monitor Module

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
The car goes into emergency mode
Reduced engine power
Problems with gear shifting (if you have an automatic transmission)
Disabling some comfort systems

Causes

Open or short circuit in the CAN bus
Wiring harness damage
Malfunction of the powertrain control module
Problems with module power supply
Corrosion of connectors

How to Fix

Check the integrity of the CAN bus
Inspect the wiring harness for damage
Check fuses and relays
Diagnose the power plant control module
Update module software if necessary

Related codes

U0293 U0295 U0296