P0513 - Incorrect Immobilizer Key

The immobilizer did not recognize the key signal as valid.

Code Overview

The immobilizer did not recognize the key signal as valid.

Common Causes

• Incorrect or damaged key
• Immobilizer antenna or module fault
• Communication issue between modules

Diagnostic Steps

1. Try another programmed key if available
2. Check for anti-theft or module communication codes
3. Inspect immobilizer antenna and module connections

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.