U300D

Ignition Input On/Start

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Engine won't start
Difficulty starting the engine
Unstable engine operation
Check Engine Light Is On
Problems with car electrical equipment

Causes

Ignition switch malfunction
Problems with the ignition circuit wiring or connectors
Engine control module (ECU) malfunction
Damaged or corroded contacts
Low battery voltage

How to Fix

Check the condition of the battery and its voltage
Inspect the ignition circuit wiring and connectors for damage and corrosion.
Check the ignition switch for proper operation
Check the engine control module (ECU) for faults
Replace faulty ignition circuit components

Related codes

U300A U300B U300C