OBD Guide

U302F

Ignition Output Accessory

U302F is an OBD-II diagnostic trouble code meaning: Ignition Output Accessory. Common causes: open or short circuit in the ignition circuit, faulty accessory relay. Estimated repair cost: $2–17.

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

FAQ

What does the U302F code mean?

U302F is an OBD-II diagnostic trouble code that indicates: Ignition Output Accessory

What causes a U302F error code?

The most common causes of U302F include: Open or short circuit in the ignition circuit; Faulty accessory relay; Blown fuse; Problems with the control unit.

How do I fix a U302F diagnostic trouble code?

To fix U302F: Check accessory circuit fuses. Check accessory ignition relay. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U302F?

Yes, but get it checked soon

How much does it cost to fix U302F?

The estimated repair cost for U302F is $2–17. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat