OBD Guide

P2AF5

Starter Relay C Stuck On

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–33 (est.)

Symptoms

  • The starter continues to operate after the engine starts
  • Relay clicks after turning off the engine
  • Low battery
  • Difficulty starting the engine
  • Starter overheating

Causes

  • Faulty starter relay
  • Short circuit in relay control circuit
  • Mechanical sticking of relay contacts
  • Wiring harness damage
  • Engine control unit (ECU) malfunction

How to Fix

  1. Check the condition of the starter relay
  2. Check relay control circuit for short circuit
  3. Measure the resistance of the relay contacts
  4. Check the condition of the wiring harness
  5. If necessary, replace the starter relay

Related codes

Error P2AF5 by Vehicle Brand