How to Fix P0359 Ignition Coil H Primary/Secondary Circuit Malfunction
If you’re experiencing a P0359 code on your vehicle, then you may be worried about what it means and how to fix it.
This code is related to the ignition system of your vehicle, specifically the ignition coil, which plays an important role in starting your engine. In this article, we’ll go over what the P0359 code means, what causes it, and how to fix it.
What is the P0359 Code?
The P0359 code is an OBD-II diagnostic trouble code that indicates an issue with the ignition coil in the primary or secondary circuit. The primary circuit includes the wiring from the battery to the ignition coil, while the secondary circuit includes the wiring from the ignition coil to the spark plugs. The PCM (Powertrain Control Module) monitors the signals from these circuits and will set the code if it detects a malfunction.
Possible Causes of P0359
There are several potential reasons why your vehicle may be experiencing a P0359 code. Here are some of the most common:
- Faulty ignition coil – The most likely cause of this code is a defective ignition coil. Over time, the coil may become damaged or worn out, causing it to malfunction.
- Wiring issues – The circuits that connect the ignition coil to the PCM and the spark plugs may be damaged or corroded, which can cause problems with the ignition system.
- Failed PCM – In rare cases, the P0359 code may be caused by a faulty PCM, which is responsible for monitoring the signals from the ignition system.
How to Fix P0359
The first step in fixing a P0359 code is to diagnose the underlying problem. If you’re not comfortable working on your vehicle, then it’s best to take it to a certified mechanic for a proper diagnosis. Here are some steps you can take to fix the P0359 code:
- Check the wiring – Inspect the wiring that connects the ignition coil to the PCM and the spark plugs for any damage or corrosion. If you find any issues, then repair or replace the affected wiring.
- Test the ignition coil – Use a multimeter to test the resistance of the ignition coil. Compare your readings to the manufacturer’s specifications. If the resistance is outside the acceptable range, then the ignition coil may need to be replaced.
- Replace the PCM – If all other possibilities have been ruled out, then a faulty PCM may be the culprit. In this case, you’ll need to replace the PCM with a new one.
Frequently Asked Questions
- Can I drive my car with a P0359 code?
It’s not recommended to drive your vehicle with a P0359 code, as it can cause damage to the engine if left untreated. - How much does it cost to fix a P0359 code?
The cost of fixing a P0359 code will depend on the underlying problem. It could be as simple as replacing some damaged wiring, or it may require replacing the ignition coil or PCM. A mechanic can give you an estimate based on your specific situation. - Can I fix a P0359 code myself?
While it’s possible to fix a P0359 code yourself, it’s not recommended unless you have experience working on vehicles. It’s best to take your car to a certified mechanic for a proper diagnosis and repair. - How long does it take to fix a P0359 code?
The amount of time it takes to fix a P0359 code will depend on the underlying problem. Some issues can be fixed quickly, while others may require more extensive repairs. - What happens if I don’t fix a P0359 code?
If you don’t fix a P0359 code, then your vehicle may experience reduced performance, decreased fuel efficiency, and potential engine damage over time. It’s best to address the issue as soon as possible to avoid further problems.
Conclusion
The P0359 code is an indication of a problem with the ignition coil in the primary or secondary circuit. While there are several potential causes of this code, the most common is a faulty ignition coil.
If you’re experiencing a P0359 code, then it’s important to diagnose and repair the underlying issue as soon as possible to avoid further problems with your vehicle. By following the steps outlined in this article, you can get your car back on the road in no time.
