OBD Guide

U3011

Ignition Input Off

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–167 (est.)

Symptoms

  • Engine won't start
  • Unstable engine operation
  • Check Engine Light Is On
  • Loss of engine power

Causes

  • Open or short circuit in the ignition circuit
  • Faulty ignition module
  • Problems with the ignition relay
  • ECM malfunction

How to Fix

  1. Check the ignition circuit for an open or short circuit.
  2. Check the resistance of the ignition coil
  3. Check the operation of the ignition relay
  4. Check ECM status

Error U3011 by Vehicle Brand