OBD Guide

U302F

Ignition Output Accessory

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$2–17 (est.)

Symptoms

  • Additional consumers do not work (sockets, heating, etc.)
  • Check Engine Light Is On
  • Electrical malfunctions
  • Intermittent operation of accessories

Causes

  • Open or short circuit in the ignition circuit
  • Faulty accessory relay
  • Blown fuse
  • Problems with the control unit
  • Oxidation of contacts

How to Fix

  1. Check accessory circuit fuses
  2. Check accessory ignition relay
  3. Inspect the wiring harness for damage
  4. Check contacts and connectors
  5. Scan other modules for errors

Related codes

Error U302F by Vehicle Brand