Diagnostic trouble code (DTC) P0513 stands for “Incorrect Immobilizer Key.”
The immobilizer system works using radio frequency identification (RFID). The transponder or smart key has a microchip, which enables it to connect to the powertrain control module (PCM). Inserting the key into the key cylinder will instantly trigger the immobilizer system to operate.
P0513 is logged when the PCM can’t recognize the immobilizer key inserted in the cylinder.
The PCM usually searches for a cryptographic signature from the key fob. The vehicle will only start (activate fuel injection and ignition sequences) if the key fob is valid. If it’s not, the PCM will trigger the P0513 code. Some systems will start and die, and you’ll notice a flashing immobilizer light.
Note that P0513 is related to passive anti-theft. You can learn more about it in our discussion about immobilizer systems.
Note: The definition of code P0513 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.
Many vehicles can log code P0513. However, that doesn’t mean that there’s a fixed diagnostic procedure that’ll work for all cars.
You’ll need to know the intricacies of your ride’s anti-theft system to diagnose this problem. So if you’re not familiar with immobilizer keys, microprocessors, and the like, it’s best to leave the job to a trusted mechanic.
But if you’re an experienced DIYer, you can diagnose this trouble code yourself. Here is a video you might want to check out before you start.
The P0513 code can be tricky to resolve. We recommend taking your ride to an auto repair shop if you don’t have the expertise to diagnose and fix this error code.
But if you’re a DIYer who’s up for the challenge, you can go ahead and fix the issue. Before starting, make sure you read up on the code and determine how to resolve it. Get vehicle-specific repair guides from resources like Chilton or an ALLDATA subscription.
Most cars nowadays have some kind of anti-theft system.
There are active anti-theft and passive anti-theft systems. Active or perimeter anti-theft, as it is sometimes called, is activated when you lock your car doors and will sound an alarm if the system isn’t disarmed with the key or a fob before opening the door.
Active or perimeter anti-theft, as it is sometimes called, is activated when you lock your car doors and will sound an alarm if the system isn’t disarmed with the key or a fob before opening the door.
– Richard McCuistian, ASE Certified Master Automobile Technician
If somebody breaks a window, it won’t sound (aftermarket systems will), but if they open the door after breaking the window or use tools to unlock and open the door, the perimeter anti-theft will usually honk the horn and flash the lights. This system’s purpose is to keep thieves from stealing items you left in your car.
Passive anti-theft systems (also referred to as “immobilizer”) are automatic and cannot be disabled by the driver. Anybody who doesn’t have a key that the passive anti-theft system recognizes won’t be able to start the engine even if they have a key that fits the ignition.
Most vehicles today don’t have actual key lock cylinders. Instead, they’re push button start and require the driver to have a recognized key fob within the vehicle before the engine can be started. In other words, passive anti-theft makes it more difficult to steal the car.
Passive anti-theft that used a chipped (immobilizer) key with a transponder first showed up in 1996. In 1993, it appeared in Europe and greatly reduced vehicle theft.
This kind of immobilizer system has an antenna coil surrounding the lock cylinder where the key is inserted. When the key is switched on, the transponder chip is activated by radio frequency and a number is broadcast through the antenna to the module, which is the “brains” of the system. In early VWs, this was in the instrument cluster. On other makes, it could be in the PCM, the instrument cluster, a stand alone module, a smart junction box, or somewhere else.
The module that receives and interprets the coded key transmission can store multiple keys, and usually a minimum of 2 keys are required. Your vehicle might log the P0513 code if there’s something wrong with its immobilizer key.
If a malfunctioning key fob is triggering DTC P0513 and immobilizing your vehicle, it’s time to buy a replacement. After all, you don’t want to be stuck somewhere because your vehicle doesn’t recognise your key fob. Thankfully, you can purchase a new key fob from CarParts.com.
Not sure what to do first? Don’t worry. CarParts.com has a dedicated support team ready to help you find and purchase the right parts for your vehicle. They’re happy to tell you all about our current budget-saving offers and customer-centered guarantees. If you need help navigating our website or learning more about our available products, they’re a quick call or chat away. Reach out if you have any questions. Our team is on call around the clock and always ready to assist.
Don’t stay locked out of your vehicle. Purchase a replacement key fob from CarParts.com as soon as possible.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.