P0513
Incorrect Immobilizer Key
Immobilizer / anti-theft
Generic OBD-II
High
What it means
P0513 means the immobilizer has read a key or transponder it doesn't recognise, so it blocks the engine from starting as an anti-theft measure. It's a security-system fault, not a mechanical one — usually a non-programmed key, a dead transponder, or an immobilizer read fault. The engine will crank but not start until the key is accepted.
High
Can I keep driving? No — the immobilizer will not let the engine start until the correct, programmed key is recognised.
Common symptoms
What you'll notice
- Engine cranks but will not start
- Security or immobilizer warning light on
- Key or 'security' message on the dashboard
- Starts only with a specific key
Common causes
Most likely first
- Using an incorrect or non-programmed keyLikely
- Faulty or unprogrammed key transponder / dead key batteryCommon
- Immobilizer module fault or lost programmingCommon
- Wiring or antenna-ring fault around the ignition/key readerLess often
How to diagnose & fix
Work through it in order
- Try the vehicle's correctly programmed key; if a spare works, the first key or its transponder is the problem.
- Inspect the ignition antenna ring and immobilizer wiring/connector for damage.
- Have the key re-programmed to the immobilizer, or replace the transponder, with proper security tooling.
- If keys are good, have the immobilizer module tested and reprogrammed. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0513?+
There's no safety risk, but you likely can't drive at all — the immobilizer blocks starting until the correct, programmed key is accepted.
Can I just clear P0513?+
Clearing won't help — the car still won't start until the immobilizer recognises a valid key. The key programming or module fault must be fixed.
Related codes
Often seen with P0513
Read & clear P0513 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX