OBD Guide

U300E

Ignition Input On

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • The engine is unstable
  • Check Engine light comes on
  • Reduced engine power
  • Problems starting the engine
  • Increased fuel consumption

Causes

  • Ignition module malfunction
  • Damage to the ignition circuit wiring harness
  • Problems with the ignition relay
  • ECU malfunction
  • Poor contact in the ignition system connectors

How to Fix

  1. Check the integrity of the ignition wiring harness
  2. Check the operation of the ignition relay
  3. Diagnose the ignition module
  4. Check connections and connectors of the ignition system
  5. If necessary, replace faulty components

Related codes

Error U300E by Vehicle Brand