All codes
Incorrect Immobilizer Key
P0513 indicates a fault related to incorrect immobilizer key. Learn the likely causes and a practical diagnostic order before replacing parts.
What you may notice
Symptoms
- 01Warning light may illuminate
- 02System function may be impaired
- 03Symptoms depend on the vehicle and fault conditions
Where to look first
Common causes
- 01Low voltage, an unrecognized key, a start-request fault, or a starter-control circuit issue may inhibit starting.
- 02Connector, wiring, ground, or supply-voltage fault
- 03Vehicle-specific mechanical or control problem
A sensible sequence
Best diagnostic order
- 01Record codes and freeze-frame data
- 02Record related immobilizer and starter codes; check battery voltage, start request, key recognition, and starter-control wiring.
- 03Compare results with vehicle-specific service information
- 04Verify the repair and monitor readiness
Step by step
What to check and repair
- 01Record related immobilizer and starter codes; check battery voltage, start request, key recognition, and starter-control wiring.
- 02Repair the confirmed cause and retest under the original fault conditions
Read the signals
Live-data clues
Start request and authorization
- Typical behavior
- Plausible for the current operating condition and vehicle specification
- Possible clue
- An implausible value or dropout helps localize the fault
| Parameter | Typical behavior | What it can suggest |
|---|---|---|
| Start request and authorization | Plausible for the current operating condition and vehicle specification | An implausible value or dropout helps localize the fault |
What P0513 means
P0513 is an OBD2 diagnostic trouble code for incorrect immobilizer key. The code identifies a detected condition, not a confirmed failed part.
Diagnostic direction
Record related immobilizer and starter codes; check battery voltage, start request, key recognition, and starter-control wiring.
Before clearing the code
Save stored and pending codes and freeze-frame data. Confirm the exact vehicle procedure and specifications, repair the verified cause, and repeat the applicable test or drive cycle.