Incorrect Immobilizer Key Detected
The P0513 code indicates that the engine control module (ECM) has detected an incorrect or unprogrammed immobilizer key during the starting sequence. This is a security feature that prevents the vehicle from starting if the key's transponder does not match the ECM's stored code. The immobilizer system uses a chip in the key that communicates with the vehicle's anti-theft system. If the key is not recognized, the ECM will disable the fuel injection or ignition, preventing the engine from starting.
1. Most Common Causes
- Unprogrammed or incorrect key used
- Faulty key transponder
- Damaged or corroded immobilizer antenna ring around ignition cylinder
- Faulty ECM or immobilizer module
2. Symptoms You Will Notice
- Engine cranks but does not start
- Security light flashing or staying on
- Key not recognized by the vehicle
3. Step-by-Step Diagnosis
Step 1: Verify that the correct, programmed key is being used. Try a spare key if available.
Step 2: Check for any aftermarket key fobs or modifications that may interfere with the immobilizer system.
Step 3: Inspect the immobilizer antenna ring for damage or corrosion. Clean or replace as needed.
Step 4: Use a scan tool to check for additional codes and perform an immobilizer system test.
Step 5: If necessary, reprogram the keys to the ECM using a professional scan tool or consult a dealership.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
No, the vehicle will likely not start or will stall shortly after starting. It is not safe to drive as the engine may shut off unexpectedly.
How much does it cost to fix?▼
Costs range from $50 to $150 for key reprogramming or replacement, but can be higher if the ECM or immobilizer module needs replacement.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.