OBD Guide

U0301

Software Incompatibility With ECM/PCM

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
~$167 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Unstable engine operation
  • Gear shifting problems (for automatic transmissions)
  • Increased fuel consumption

Causes

  • Incompatible ECU software update
  • Replacing the ECU with an incompatible version
  • Damage to ECU software
  • Incompatible modules in the control system
  • Problems with communication between modules

How to Fix

  1. Check ECU software version
  2. Update ECU software to a compatible version
  3. Check compatibility of all system modules
  4. Reset errors and calibrate the ECU
  5. If necessary, replace the ECU with a compatible version

Related codes

Error U0301 by Vehicle Brand