P1351 code — how to fix error fast

Even if you are an experienced driver, keeping track of all the OBD2 codes like P1351 can be tough and often unnecessary. However, when the issue with this code emerges, you have to be ready by knowing the depths of the P1351 code meaning and how it affects your car.

Don’t worry, we’ll guide you through it with a comprehensive article that covers everything from the code P1351 causes to the main ways of diagnosing and fixing the code. We’ll also let you know how you can prevent this code from happening again in the future, so let’s get into it.

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What does the P1351 code mean?

The P1351 code is a diagnostic trouble code that indicates a problem with the ignition control circuit. This code is typically triggered when the powertrain control module (PCM) detects an issue with the ignition system while the engine is running. The PCM is responsible for monitoring the system and ensuring that it is functioning properly.

When the P1351 code is triggered, it means that there is a problem with the ignition system that needs to be addressed. If the code is not fixed, it can cause serious damage to the engine and other components of the car.

What causes the P1351 code?

There are several potential causes of the P1351 code. To even get to the diagnostic part, it takes knowing a bit more about the code’s main causes and symptoms, so here’s our list to help you with that:

Faulty ignition coil module

The ignition control module (ICM) is responsible for controlling the spark plugs’ timing and intensity. If the ICM fails, it can cause a misfire or a no-start condition, triggering the P1351 code.

The bad crankshaft position sensor

The crankshaft position sensor (CKP) provides the engine’s position information to the vehicle’s computer. If the CKP fails or sends incorrect data, it can cause ignition system problems, including the P1351 code.

Worn spark plugs or wires

Spark plugs and wires wear out over time and can cause weak or erratic sparks, leading to engine misfires and the P1351 code.

Bad ignition coils

Ignition coils are responsible for generating high voltage to ignite the air-fuel mixture in the cylinders. A bad coil can cause misfires and trigger the P1351 code.

Which car models does the P1351 code affect the most?

The P1351 code can affect a variety of car models, but some models are more prone to this issue than others. Some of the car models that are most commonly affected by the P1351 code include the following models:

• Chevrolet Camaro: The Chevy Camaro RS and SS are often prone to experiencing the P1351 code due to issues with the ignition control module.
• Cadillac Seville: The Cadillac Seville equipped with Northstar V8 engines is also known to have problems with the ignition control module, which can trigger the P1351 code.
• GMC Sierra: GMC Sierra models with V8 engines may experience the P1351 code due to ignition system problems such as faulty coils or spark plugs.

How to diagnose the P1351 code

If you suspect that your car is experiencing the P1351 code, it is important to diagnose the issue as soon as possible. To diagnose the code, you will need to use specialized diagnostic tools and equipment. The first step in diagnosing the code is to use a diagnostic scanner to read the code and determine the cause of the issue. Still, there are some steps you can take yourself without any specialized tools or professional assistance:

Inspect the ignition system components

A visual inspection of the ignition system components such as spark plugs, wires, coils, and sensors can help identify any obvious issues such as damaged or worn-out parts.

Test the ignition coil module

The ignition control module (ICM) is a common cause of the P1351 code. Testing the ICM involves using a multimeter to check for continuity and voltage at different points. The test results help determine if the ICM is faulty and needs to be replaced.

Check the wiring and connections

Faulty wiring or loose connections can cause erratic signal transmission between various ignition system components leading to misfires and triggering the P1351 code. Checking wiring and connectors for damage, corrosion, or poor connections can help resolve these issues.

How to fix the P1351 code

Once you have diagnosed the P1351 code, it is important to take steps to fix the issue as soon as possible. The best way to fix the code will depend on the underlying cause of the problem. Some potential fixes include:

Replace the ignition coil module

If the ignition control module (ICM) is faulty, it needs to be replaced. The ICM controls the spark plugs’ timing and intensity, and a malfunctioning ICM can cause misfires and trigger the P1351 code.

Replace the crankshaft position sensor

If the crankshaft position sensor (CKP) is defective, it can cause ignition system problems that trigger the P1351 code. Replacing the CKP with a new one can resolve this issue.

Replacing the spark plugs and wires

Worn-out spark plugs and wires can cause weak or erratic sparks, leading to engine misfires and the P1351 code. Replacing these components with new ones can restore proper ignition system performance.

Replace related faulty components

Depending on the root cause of the P1351 code, other components such as the camshaft position sensor (CMP) or ignition coils may need to be replaced to resolve the issue.

How to prevent the P1351 code

There are several steps you can take to prevent the P1351 code from occurring. Here are the most important ways of prevention you can use:

• Perform routine maintenance of your car’s ignition system
• Check the ignition coils and replace spark plugs as recommended by the manufacturer
• Inspect the ignition control module

One of the most important preventative measures is to perform routine maintenance on your car’s ignition system. This may include replacing the spark plugs and wires, inspecting the ignition control module, and testing the crankshaft and camshaft position sensors to be sure it all works correctly.

Our take

We hope that our guide will help you figure out the cause of the code in your car and fix it promptly. We also recommend you make use of the preventive measures.

It is also important to properly maintain the other systems in your car, such as the timing belt, alternator, and battery. By taking these preventative measures, you can help to avoid the P1351 code and other issues that can cause damage to your car’s engine and other components.