Ignition coils are responsible for providing the spark plugs with the necessary high voltage to ignite the air-fuel mixture inside the combustion chambers.
If the check engine light switches on and you find P0352 code logged on your code reader, it means that there is a potential problem with the cylinder #2 ignition coil or its circuit. Find out more about this OBD-II code, including the signs you need to look for with this short guide.
What Does the P0352 Code Mean?
Diagnostic trouble code (DTC) P0352 stands for “Ignition Coil “B” Primary / Secondary Circuit Malfunction.” It indicates that there’s a potential problem in either the primary (computer) side or the secondary (spark plug) side of the ignition coil “B” (cylinder #2) circuit.
The COP or coil-on-plug ignition system is the most common ignition system used in modern vehicles. This means that for each engine cylinder, there is an individual ignition coil.
The diagnostic trouble code (DTC) P0352 registers if there is an issue with the driver circuit for coil number 2. Depending on the vehicle, the PCM may also shut down the fuel injector to the corresponding cylinder.
If you wish to learn more about how the primary and secondary windings of ignition coils work, read our technical discussion here.
Otherwise, continue reading about the possible causes of code P0352 below.
What are the Possible Causes of the P0352 Code?
There are a few possible reasons why the P0352 code may register in your vehicle. It’s important to pinpoint the root cause when making a diagnosis, so that appropriate repairs can be done. Below are some of the possible causes of the P0352 ignition coil B location trouble code:
- Defective cylinder #2 ignition coil
- Ignition coil circuit issues (e.g., damaged wiring, loose connections, etc.)
- PCM issues (e.g., outdated software but this is very rare)
- If the engine has an adjustable cam sensor, CMP adjustment can cause this code to be set when there’s nothing wrong with the coil or circuit, but that is also very rare.
What are the Common Symptoms of the P0352 Code?
You’re possibly dealing with the OBD-II code P0352 if you’re experiencing a combination of the symptoms below when you’re driving your car. It’s best to address this trouble code immediately in order to avoid bigger problems down the line. Consult a repair manual or a mechanic if you’re unsure about repair and diagnosis.
- Check engine light is on
- Engine idles rough
- Engine misfires
How to Diagnose the P0352 Code
It can be a challenging task to properly diagnose OBD-II codes like the DTC P0352 because there are multiple possible reasons why the error code might appear. Fortunately, there are a lot of online resources available to guide you in determining the root cause of this particular code. Below are some video references that you can use to get an idea of how the P0352 code might be diagnosed:
How to Fix the P0352 Code
Diagnosing and troubleshooting the P0352 code requires automotive know-how. If you are not confident with your knowledge or DIY skills, it may be best to leave the job to your mechanic. Otherwise, feel free to try to address the issue yourself.
P0352 code repair begins with diagnosis. Once you’ve established what triggered the DTC, figure out how to resolve it using online auto repair resources and guides. You may also consider getting an ALLDATA single-vehicle subscription for comprehensive factory repair information.
The P0352 code is a generic powertrain code, which means it is supported by various makes and models and the repair process may vary from vehicle to vehicle. Make sure you are employing a fix that’s appropriate for your car by consulting a repair manual or database before attempting repairs. Otherwise, you risk worsening the issue.
Other Notes About the P0352 Code
Your vehicle’s PCM logs ignition coil circuit codes P0351-P0358 if it detects a problem with the ignition coil circuitry. The last digit of these codes refers to the affected cylinder. Repair and diagnosis procedures may differ according to the cylinder, so be sure to research well about the particular trouble code first before attempting any repairs. These ignition coil circuit codes are often accompanied by the misfire codes P0300-P0308.
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