Engine-Codes.com
Engine-Codes – Toyota – P0351 Toyota

P0351 Toyota Code - Ignition Coil 1 Primary/Secondary Circuit

Quick Answer

The P0351 diagnostic trouble code (DTC) for Toyota vehicles refers to an issue with the ignition coil 1 primary/secondary circuit. Common causes include Faulty ignition coil, Damaged or corroded wiring or connectors, Issues with the ignition control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0351 Toyota indicates Ignition Coil 1 Primary/Secondary Circuit.
Common causes
Common causes include Faulty ignition coil, Damaged or corroded wiring or connectors, Issues with the ignition control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 18, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0351 Toyota Description

The P0351 diagnostic trouble code (DTC) for Toyota vehicles refers to an issue with the ignition coil 1 primary/secondary circuit. The ignition coil is a crucial component in the vehicle's ignition system, responsible for converting the low voltage from the battery into the high voltage needed to ignite the fuel and air mixture in the engine cylinders. When the ignition coil 1 primary/secondary circuit malfunctions, it can lead to misfires, poor engine performance, and potential damage to other engine components.

OBDII Code P0351 Toyota - Ignition Coil 1 Primary/Secondary Circuit
P0351 Toyota Code - Ignition Coil 1 Primary/Secondary Circuit

Common Causes of P0351 Toyota

  1. Faulty ignition coil
  2. Damaged or corroded wiring or connectors
  3. Issues with the ignition control module
  4. Engine overheating
  5. Excessive vibration or physical damage

Symptoms of P0351 Toyota

  1. Engine misfires
  2. Rough idling
  3. Loss of power or acceleration
  4. Poor fuel efficiency
  5. Engine stalling

How to Fix P0351 Toyota

  1. Diagnose the issue by using a scan tool to verify the P0351 code and check the ignition coil 1 primary/secondary circuit.
  2. Inspect the wiring and connectors for damage or corrosion, repairing or replacing as necessary.
  3. Test the ignition coil for proper resistance and functionality, replacing if faulty.
  4. Clear the error code from the vehicle's computer using the scan tool.
  5. Test drive the vehicle to ensure the issue has been resolved and the code does not reappear.

Cost to Fix P0351 Toyota

The typical repair costs for resolving a P0351 code related to the ignition coil 1 primary/secondary circuit on a Toyota vehicle can range from $150 to $300, including both parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary depending on various factors. It is recommended to check with local shops for a more accurate estimate based on your location and vehicle specifics.

Need more information about the P0351 Toyota code?

Need more information on how to fix the P0351 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0351 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0351 Toyota Code

1. What are the common symptoms of OBDII code P0351 in a Toyota?

- Common symptoms include engine misfires, rough idling, loss of power, and illuminated check engine light.

2. What does the OBDII code P0351 for Toyota mean?

- The code indicates a problem with the ignition coil 1 primary/secondary circuit in the vehicle's ignition system.

3. What are the possible causes of OBDII code P0351 in a Toyota?

- Potential causes include a faulty ignition coil, wiring issues in the ignition coil circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the issue related to OBDII code P0351 on my Toyota?

- Diagnose by checking the ignition coil and related wiring for damage, testing the ignition coil's resistance, and scanning the ECM for fault codes.

5. Can I drive my Toyota with OBDII code P0351?

- It is not recommended to drive the vehicle with this code as it can lead to further damage and poor performance.

6. How can I repair OBDII code P0351 in my Toyota?

- Repair involves replacing the faulty ignition coil, repairing any damaged wiring, and clearing the fault code from the ECM.

7. Are there any preventive maintenance tips to avoid OBDII code P0351 in a Toyota?

- Regularly inspect and maintain the ignition system components, such as ignition coils, spark plugs, and wiring, to prevent issues.

8. Can a DIY enthusiast fix OBDII code P0351 in a Toyota?

- Depending on your skill level, you may be able to replace the ignition coil yourself, but diagnosing and repairing wiring issues may require professional help.

9. How much does it cost to fix OBDII code P0351 in a Toyota?

- The cost can vary depending on the extent of the issue, but typically, replacing an ignition coil can range from $100 to $300, including labor.

10. Will resetting the check engine light resolve OBDII code P0351 in a Toyota?

- Resetting the light may temporarily turn it off, but the underlying issue causing the code will still need to be diagnosed and repaired to prevent further problems.

Discuss the causes and fixes for P0351 Toyota OBDII Code

Submit a New Comment

  • I am getting codes p0351, p0354, and p0341 on my 2003 toyota camry 4 cylinder. I've replaced the camshaft position sensor and I cannot get the engine to start in the mornings. But after it has sat in the sun all day it starts in the afternoon time. I've ordered four new coil packs and don't know what to do if this doesn't fix the problem. I don't understand why it won't start on cool mornings but fires right up in the afternoon time.

    Reply to Comment

  • Sounds like one the sensor has poor connection. You should start by disconnecting and reconnecting the sensors. Make sure the connectors are firmly connected.

    Reply to Comment

  • i have same problem but my car is not to start

    Reply to Comment

  • hello ,
    i have a corolla 2007 , some times it looks like it goes of and the machine is shaking i checked with a auto mechanic he connect a computer and show ( coil c primary and secondary need to check ) and then i replaced the coil with other coil in cylinder 4th but steel i have the same problem is something wrong with ECM its not all the time some times it happen anyone cane help me please ?

    Reply to Comment

  • You swap the ignition coils and got the same code (P0351) ?

    If you get the same code, even by swapping the ignition coils, then the problem is either the ignition coil connector or the wire from the ignition coil to the Engine Control Module (ECM)

    Reply to Comment

  • Did you figure this out? I am having the same exact problem.

    Reply to Comment

  • I replaced the crankshaft position sensor and now its starting. I wanted to update in case anyone found this and needed an answer.

    Reply to Comment