What Is the P1259 Code?
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If you’re seeing the P1259 diagnostic code as “Immobilizer to PCM Signal Error,” it means there’s a problem with the anti-theft properties within your car. The “Immobilizer” is also known as the anti-theft system, and it can come up by many names, including VDT (Vehicle Theft Deterrent) for General Motors, PATS (Passive Anti-Theft System) for Ford, and SKIS (Sentry Key Immobilizer System) for Chrysler. This problem indicates that the anti-theft system and the powertrain control module (PCM) are not communicating properly.
More About the P1259 Code
This is a manufacturer-specific code, and the description associated with the code will impact what the code means. Here are a few other manufacturers that may use different descriptions for this code:
- Acura: Camshaft Position (CMP) Actuator – circuit malfunction
- Audi: Engine Coolant System Valve Short To Ground
- Honda & Isuzu: VTEC System Malfunction
- Volkswagen: Engine Coolant System Valve Short To Ground
This is one of the many reasons why looking at the description of a car code can be so important. You need to know the actual problem that you’re dealing with.
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What Are the Symptoms of a P1259 Code?
If you’re receiving a P1259 code, the vehicle will not start. In some cases, however, the engine may crank, but will never catch. This is because the intention of the immobilizer is to prevent theft, so when the immobilizer and PCM no longer have a connection, the vehicle wants to avoid theft at all costs, and therefore makes it impossible for you to even start the car. If the problem is intermittent, there can be unpredictable no-start conditions, with the car sometimes starting and sometimes not, and the engine even shutting off or stalling seemingly at random.
What Are Some Causes of a P1259 Code?
The most common cause of the P1259 code is actually issues with the batteries in a transponder key; if you’re experiencing this problem, your first step may be to replace the batteries in the key fob to see whether it fixes the problem. However, it may also be due to open circuits within your CAN system, defective electronics in the key or fob, issues with wiring and connectors, or even, in some rare cases, a failing PCM.
How Serious Is the P1259 Code?
Because this code makes it impossible for your car to start or drive, it’s very serious. In cases where the problem is intermittent and only occurs sometimes, you can experience unpredictable issues with the car stalling or shutting off while you’re driving. If you’re experiencing this problem, it’s important to talk to an expert as soon as possible.
Can I Still Drive with a P1259 Code?
By default, you will not be able to drive with this code. This code will shut down your engine, which means that although it’s not dangerous, it makes the code impossible to drive with. If you experience it while you’re out, you may need to have a tow truck take your car to the nearest repair shop.
How Easy Is It to Diagnose a P1259 Code?
If you aren’t able to fix the code by using your spare key or replacing your key fob batteries, the only option is to take the vehicle to an authorized dealer for professional diagnosis and repair. There are many layers of security features that a vehicle uses to avoid theft, and only an authorized dealer has the right tools to fix this problem without triggering them and potentially creating additional issues with the car.
How Difficult Is It to Inspect a P1259 Code?
If you’re able to read codes from your engine, you may be able to take the first two steps to potentially solving this problem: replacing your key batteries and trying the spare key. However, past this, DIY fixes will almost certainly make the problem worse rather than better. If these two things don’t fix the problem, you will have to contact an authorized dealer to learn more about your options.
Need Additional Help with Your P1259 Code?
This is a difficult code to fix if the problem doesn’t lie within your key itself. If you’re worried about this code, only an expert can help; any DIY fix could actually make the problem worse, and it’s best to talk to a dealer nearby. If you’re looking for professional help, there are always options available locally.
Kelley can help you find a repair shop near you, which means that you’ll be able to fix the problem more effectively. You can also use this tool to get help for other problems that aren’t the P1259 code.
Additionally, if you want to learn more about these codes and how you can fix them, check out the KBB OBD-II database. It’s a great starting point for anyone who’s interested in the way codes work in your car.
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