Engine Won’t Turn Off: Causes
An engine that keeps running after you switch off is rare but needs attention. A Cranbourne West specialist explains.
What it usually means
On modern cars, failing to switch off (or the ignition staying live) is usually an electrical fault — a faulty ignition switch, a stuck relay, or a push-button/start-system fault. On older cars, “running on” (dieseling) after switch-off can be carbon or a fuelling issue.
A car that won’t shut down is an electrical fault to diagnose, not ignore.
What you should do
Get it diagnosed promptly — an ignition system that won’t switch off properly is both inconvenient and a potential electrical concern. Know your car’s emergency shut-off (e.g. holding the start button).
We test the ignition switch, relays and start system to find why it won’t shut down.
How we find & fix it
Because the same symptom can have several causes, we use dealer-level diagnostics and a methodical check to pinpoint the real cause — rather than throwing parts at it.
You get a clear explanation and a fixed written quote before any work. Book online in 60 seconds or call 03 8782 0711.
Engine Won’t Turn Off: Causes — FAQ
Usually an electrical fault — a faulty ignition switch, a stuck relay, or a start-system fault. Older cars can “run on” from carbon.
On push-button cars, holding the start button usually shuts it down — check your handbook.
It’s an electrical fault to diagnose promptly — don’t ignore it.
We test the ignition switch, relays and start system.
Related guides & services
Car doing something odd?
Trusted Cranbourne West car specialists — RACV-accredited, fixed written pricing. Book online or call 03 8782 0711.