P0513: Incorrect Immobilizer Key
The immobiliser system has detected a key that is not authorised for this vehicle. Engine start is blocked. Possible causes are an unprogrammed replacement key, a transponder fault, or a deliberate attempt to start with the wrong key.
What P0513 means
P0513 is a generic OBD-II powertrain code in the speed, idle & cruise group.
- Check engine light
- Usually off
- Emissions-related
- No
- Limp mode possible
- Not typical
- Drive cycle to clear
- Not required
Get it fixed
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Common causes
- 01Replacement key not programmedMost likely
- 02Key transponder defectivePossible
Can I drive with P0513?
Generally yes.
This fault is unlikely to affect how the car drives. Fix it when convenient.
Why we rate it low
- Does not normally turn on the check engine light
Severity is our rule-based rating from the code’s flags in OBDex and the system it affects, not an inspection of your car. If the check engine light is flashing, or you notice overheating, low oil pressure, or brake or steering problems, stop driving and get help.
How to diagnose P0513
- 1
Confirm the code and save freeze-frame data
Read the codes with an OBD-II scan tool and note every code, not just P0513. Save the freeze-frame data (speed, load, temperature when the fault set) before clearing anything; it tells you when the fault happens.
- 2
Fix other faults first
If other codes are stored, start with power-supply, sensor-circuit and communication codes. They can cause this code as a side effect.
- 3
Check live data
Watch the related sensor and actuator readings in live data (Immobilizer, Key transponder) and compare them with expected values in the service information for your vehicle.
- 4
Test the likely causes in order
Start with the most likely cause and work down: Replacement key not programmed; key transponder defective. Test before replacing parts.
- 5
Check for recalls and service bulletins
Look up recalls for your exact vehicle with its VIN, and ask a dealer about technical service bulletins (TSBs). Manufacturers sometimes issue software updates or extended warranties for known faults.
- 6
Clear the code and verify the repair
After the repair, clear the code and drive the car under the conditions in the freeze-frame data to confirm it does not return.
P0513 repair cost estimate
Estimate, not a quote. Labor times are typical ranges for this code from OBDex, and $125/hr is an assumed rate. Shop rates and labor times vary by vehicle and region. Diagnosis time may be billed separately.
- DIY difficulty
- Moderate
- Good DIY job?
- Usually a shop job
Needs a scan tool and some experience with testing.
Parts and systems involved
- Immobilizer
- Key transponder
P0513 FAQ
What does P0513 mean?
P0513 means “Incorrect Immobilizer Key”. The immobiliser system has detected a key that is not authorised for this vehicle. Engine start is blocked. Possible causes are an unprogrammed replacement key, a transponder fault, or a deliberate attempt to start with the wrong key.
Is P0513 serious? Can I keep driving?
We rate P0513 as low severity. Generally yes. This fault is unlikely to affect how the car drives. Fix it when convenient.
What causes P0513?
The most common causes, from most to least likely: Replacement key not programmed; Key transponder defective. Test before replacing parts, because several causes can set the same code.
How much does it cost to fix P0513?
Typical labor is about $65–$250 at an assumed $125/hour shop rate, plus parts. That is an estimate, not a quote: labor times and rates vary by vehicle and region, and diagnosis may be billed separately.
Can I fix P0513 myself?
DIY difficulty is moderate. Most owners leave this to a shop because it needs involved testing or specialist tools. Always confirm the cause before buying parts.
Will P0513 clear itself?
If the fault was intermittent, the warning may go off once the computer stops seeing it, but the code stays in memory. Fix the cause; clearing the code alone doesn’t repair anything.