P0357 Code: Ignition Coil “G” Primary / Secondary Circuit Malfunction

An engine misfire could indicate a wide range of issues with your vehicle. If you use an OBD-II scanner to determine the possible causes of your engine misfire, there are a number of diagnostic trouble codes that might register on your scanner, including code P0357.

What Does the P0357 Code Mean?

Diagnostic trouble code (DTC) P0357 stands for “Ignition Coil ‘G’ Primary/Secondary Circuit Malfunction.” It’s a generic powertrain code for modern vehicles equipped with OBD-II.

Note: The definition of code P0357 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

Most modern engines have a coil on plug (COP) ignition system, which places the ignition coils on top of the spark plugs to improve combustion and reduce misfires. The PCM monitors each coil circuit for faults.

If the PCM detects an open or short in the coil circuit for the number seven coil, it might register a P0357 code. The PCM may also shut down the fuel injector to the cylinder in some vehicles as a fail-safe measure.

If you’re planning to troubleshoot P0357 yourself, read our technical discussion about how the primary and secondary windings of ignition coils work.

You may also watch this video to understand how ignition coil works:

What are the Possible Causes of the P0357 Code?

Several factors may trigger a P0357 code. Make sure to inspect each of the following components when your OBD-II scanner reads this particular diagnostic trouble code. Here’s a list of possible causes for the P0357 code.

• Faulty ignition coil
• Circuit problems, such as damaged wiring or a poor connection
• An issue with the PCM

What are the Common Symptoms of the P0357 Code?

A P0357 code might be accompanied by other DTCs. However, if your PCM is only storing a P0357 code, your vehicle might exhibit these common symptoms.

• Illuminated check engine light
• Engine misfires and runs rough

How to Diagnose the P0357 Code

A P0357 code can be difficult to diagnose because some of its symptoms might overlap with other DTCs. Keep in mind that some vehicles might require different diagnostic procedures. Here’s a video to help guide you through the general diagnostic process.

How to Fix the P0357 Code

Fixing the issues that cause your P0357 to set might be confusing if you don’t have the right tools and automotive repair knowledge. That’s why you should ask a certified mechanic to check your vehicle. They can accurately diagnose your diagnostic trouble code and perform the appropriate repairs for you.

However, if you feel confident in your DIY skills, you must first find out the underlying causes that triggered the P0357 code. Repair manuals and databases, such as those from Chilton and ALLDATA DIY, are valuable resources for vehicle-specific repair information. Once you’ve determined the possible causes of the P0357 code, you can then proceed with the appropriate repairs for your vehicle.

Diagnostic trouble codes don’t always indicate a problem with a specific part. For example, a P0357 code might not necessarily mean that your ignition coil “G”  has malfunctioned. Keep this in mind when troubleshooting your vehicle’s P0357 code.

Where to Get New Ignition Coils to Fix Code P0357

If the diagnosis reveals that a bad ignition coil triggered the P0357 code, don’t disregard it. Otherwise, the issue could get worse, resulting in problems that are not only costly to repair but also make driving a hassle. If you’re in the market for high-quality ignition coils that won’t break the bank, CarParts.com has you covered.

Start shopping by entering your ride’s year, make, and model into our vehicle selector to narrow the catalog to compatible ignition coils for your car, truck, or SUV. You can also use our search filters to narrow the results according to your preferred brand, price range, and more.

All our products pass stringent quality checks to ensure maximum durability and dependability, so you won’t have to second-guess product quality when you shop with us. Our ignition coils also come with a low-price guarantee to give you the best value for your money. Plus, if you order before noon, you can expect your package to arrive in as fast as two business days.

If you have any queries regarding your order, you can reach us via our toll-free hotline. Call us anytime and have our customer service representatives assist you.

Check out our selection of high-quality ignition coils at CarParts.com today!