P1351 Technical Description
Ignition Coil Control Circuit High Voltage
If your car’s dashboard is flashing the P1351 code, you’re probably wondering what it means and how you can fix it. You’re in the right place for answers.
This guide will walk you through the technical definitions, symptoms, and solutions related to the P1351 error.
Having seen this code in many vehicles, I can assure you that resolving it can often be straightforward if you follow the right steps.
In this article, we’ll specifically explore what triggers the P1351 code to appear, identify the typical symptoms that accompany it, and provide detailed solutions to get your vehicle back in top shape.
Time to peel the hood back and see what’s underneath!
Key Takeaways
- Definition: P1351 is an OBD-II trouble code for “Ignition Coil Control Circuit High Voltage.”
- Symptoms: Common symptoms include engine misfires, check engine light, reduced power, hard starts, poor fuel economy, and engine stalling.
- Causes: Potential causes range from faulty ignition coils to damaged coil driver circuits, poor electrical connections, shorted wiring, and in rare cases, a defective PCM.
- Diagnosis: Begin with an OBD-II scanner, conduct a visual inspection of relevant wiring and components, and test the ignition coil and circuitry.
- Resolution: Fixing the P1351 code can involve replacing the ignition coil, repairing wiring, or addressing PCM issues, followed by clearing codes and a test drive.
- Community Help: Sharing your experiences with fixing a P1351 error can provide valuable insights and help to others facing similar issues.
Table of ContentsShow
What Does P1351 Trouble Code Mean?
Ah, the P1351 code – a classic head-scratcher for many drivers and mechanics alike. This code signals an issue with the ignition control module’s (ICM) circuit high voltage.
But let’s break that down into bite-sized chunks, shall we?
At its core, the P1351 trouble code is your car’s way of saying, “Hey, there’s something funky going on with the system that controls when and how the spark plugs fire.”
This system is crucial because it ensures that your engine runs smoothly, efficiently, and powerfully by managing the timing of the spark plugs.
Now, why should you care about this?
Well, if the ignition control isn’t in tip-top shape, you might notice your car behaving more like a stubborn old mule than a sleek, well-oiled machine.
We’re talking about symptoms like misfires, reduced fuel economy, or even difficulty starting the car. Essentially, it’s your car’s way of crying out for help.
Addressing a P1351 code is not about putting a band-aid on a bullet wound.
It requires a bit of detective work to pinpoint whether the issue lies with electrical connections, the ignition control module itself, or even other components that might be affecting the system’s voltage.
So, if your car decides to throw this code at you, don’t just shrug it off.
Consider it a nudge to check under the hood (or better yet, have a professional do it) to ensure your ride continues to run as smooth as a jazz solo on a Sunday morning. Ignoring it could turn a small hiccup into a full-blown concert of mechanical woes.
P1351 Trouble Code Symptoms
When the P1351 trouble code is active, you might notice several distinct symptoms affecting your vehicle’s performance. Here’s a list of common signs to watch for:
- Engine Misfires: The engine may run unevenly or misfire, which can be felt as a rough ride or shaking when the engine is running.
- Check Engine Light: The most obvious indicator; your dashboard will light up with the check engine warning.
- Reduced Power: You may experience a noticeable reduction in engine power, making your vehicle feel sluggish.
- Hard Starts: The car might struggle to start or require multiple attempts to get the engine running.
- Poor Fuel Economy: Increased fuel consumption can occur due to inefficient burning of fuel.
- Engine Stalling: In some cases, the engine may stall completely, especially at low speeds or when idling.
P1351 Trouble Code Causes
The P1351 code can be triggered by various issues related to the ignition system. Below are the key culprits that might be causing this error:
- Faulty Ignition Coil: Often, a malfunctioning or damaged ignition coil is to blame.
- Damaged Coil Driver Circuit: Problems in the coil driver circuit within the PCM can also lead to this code.
- Poor Electrical Connections: Loose or corroded connections in the ignition coil circuit may result in high voltage readings.
- Shorted Wiring: Frayed or shorted wires in the ignition coil harness can disrupt normal voltage levels.
- Defective PCM: Though less common, a faulty powertrain control module can falsely trigger this trouble code.
How To Fix A P1351 Trouble Code
Resolving a P1351 trouble code involves a few diagnostic and repair steps to accurately pinpoint and address the underlying issue. Here’s how you can tackle this problem:
1. Diagnostic Scan
Start with a comprehensive scan using an OBD-II scanner. Confirm the presence of the P1351 code and check for other related codes that could provide additional clues.
2. Visual Inspection
Inspect all wiring and connectors in the ignition coil circuit. Look for signs of damage, wear, or corrosion. Pay special attention to the insulation and connectors for any signs of fraying or disconnection.
3. Check the Ignition Coil
Test the ignition coil with a multimeter to verify its resistance and condition. Compare your findings to the specifications provided by your vehicle’s manufacturer. Replace the coil if it doesn’t meet specifications.
4. Examine the Coil Driver Circuit
This involves checking the continuity and voltage in the coil driver circuit from the PCM to the ignition coil. This step may require detailed schematics for your vehicle and a solid understanding of electronic diagnostics.
5. Replace Faulty Wiring
If you find any damaged wires or poor connections, repair or replace them immediately to ensure all electrical components are functioning correctly.
6. PCM Check
As a last resort, consider the PCM itself might be faulty. This is a less common cause but should be considered if all other diagnostics do not resolve the issue. Testing the PCM often requires professional tools and expertise.
7. Clear the Codes and Test Drive
Once repairs are made, clear all diagnostic trouble codes from the vehicle using the OBD-II scanner. Then, take the vehicle for a test drive to ensure that the issue is resolved and the P1351 code does not reappear.
By methodically working through these steps, you can identify and fix the causes of the P1351 trouble code, restoring your vehicle’s performance and reliability.
Conclusion
You’re now equipped with the knowledge of what the P1351 trouble code means and how you can tackle it. This clarity should put you in a better position to handle your car’s issue confidently.
Have you ever encountered a P1351 code before, and how did you resolve it?
Feel free to share your experiences or ask for tips in the comments below—let’s help each other out!
