Does it go out by itself?
Sometimes, if the fault disappears over several drive cycles. That does not mean it is fixed: the code stays stored.
Check engine light on: what to do
What the check engine light means, when you can keep driving and how to find the cause from the symptoms and the OBD code.
Frequently asked questions
Can I pass the roadworthiness test with the light on?
A lit fault warning is usually a reason for failure. Confirm with your test centre.
AI-generated guidance. It may contain errors: confirm any important information and see a professional for anything that affects safety.
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