P0513Generic code

P0513 Code: Incorrect Immobilizer Key

The P0513 code means the computer did not recognize the key as valid. The engine may not start, or may start and shut off within seconds. Try your other original key first, because that tells you whether the problem is the key or the vehicle.

Severity
High
Can I keep driving?
No, stop and have it checked
Estimated cost
$50 to $400
Difficulty
Medium
System
Computer and Outputs
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P0513 code means

The key carries a transponder with a code. When you turn the key on, an antenna ring around the ignition lock reads it, and the immobilizer system compares it with the registered codes. If it does not match, the computer blocks fuel injection or the starter and stores the P0513 code.

The cause can be a key that was never programmed (a copy that was cut but not coded), a damaged transponder, interference from other keys on the key ring, or an antenna failure.

Try your other original key first. If it starts the engine, the problem is in the key.

On vehicles with a smart key (keyless), a weak battery in the fob can cause the same symptom. Holding the fob against the start button or in the spot shown in the owner manual usually lets you start the engine in that case. If no key works, the fault is usually in the antenna, the immobilizer module or its communication with the computer.

P0513 code symptoms

  • The engine does not start, or shuts off after a few seconds.
  • The immobilizer light (a padlock or a key) flashes.

Likely causes of the P0513 code

  1. Key not programmed. A copy that was cut but not coded.
  2. Damaged transponder. Knocks or moisture can ruin it.
  3. Interference from other keys or cards on the key ring.
  4. Immobilizer antenna. The coil around the ignition lock does not read the transponder.
  5. Weak battery in vehicles with a smart key.

How to diagnose the P0513 code step by step

  1. Try another original key.
  2. Take other keys and cards off the key ring.
  3. Read the immobilizer module with the scan tool.
  4. Check the antenna and its connector.
  5. With a smart key, hold the fob against the start button or the spot the owner manual shows, so the engine can start even though the fob battery is weak.

How to fix the P0513 code

  • Program the key with the right equipment.
  • Replace the key or the transponder.
  • Repair the antenna.

Technical reference data

  • Programming keys requires specific equipment or the dealer.
  • These values are a general guide: check the manufacturer data for your vehicle.

Brand-specific notes

On many vehicles, programming a new key requires a security code (PIN) from the manufacturer. Ask for it before you pay for a key to be cut, so you know the shop can actually program it.

Frequently asked questions about P0513

What does the P0513 code mean?
It is a generic OBD2 code that means the computer did not accept the key as valid. The immobilizer could not match the transponder code to the ones it has registered.
Can I drive with a P0513 code?
Usually not. With a P0513 code stored, the immobilizer blocks the engine, so the vehicle may not start at all, or it may start and shut off in seconds.
Why will it not start with a copy of the key?
Because the transponder in the copy is not programmed.
Can I program the key myself?
Only on some models, which let you program an extra key if you have two originals.
Can the immobilizer be disabled?
It is not recommended, and in many cases it is not legal.
How much does it cost to fix P0513?
Between $50 and $400. Programming a key is at the low end, and replacing the antenna or the immobilizer module is at the high end.
What is the most common cause of P0513?
A key that was never programmed, such as a copy that was cut but not coded. A damaged transponder and interference from other keys on the ring are also common.

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