U300E
Ignition Input On
U300E is an OBD-II diagnostic trouble code meaning: Ignition Input On. Common causes: ignition module malfunction, damage to the ignition circuit wiring harness. Estimated repair cost: $17–56.
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
- Check the integrity of the ignition wiring harness
- Check the operation of the ignition relay
- Diagnose the ignition module
- Check connections and connectors of the ignition system
- If necessary, replace faulty components
Related codes
Error U300E by Vehicle Brand
FAQ
What does the U300E code mean?
U300E is an OBD-II diagnostic trouble code that indicates: Ignition Input On
What causes a U300E error code?
The most common causes of U300E include: Ignition module malfunction; Damage to the ignition circuit wiring harness; Problems with the ignition relay; ECU malfunction.
How do I fix a U300E diagnostic trouble code?
To fix U300E: Check the integrity of the ignition wiring harness. Check the operation of the ignition relay. Diagnose the ignition module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U300E?
Limited driving only, diagnose soon
How much does it cost to fix U300E?
The estimated repair cost for U300E is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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