AutoCodes – Mazda – P0351 Mazda

P0351 Mazda Code - Ignition Coil Primary Circuit Fault Cylinder 1

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 circuit poor electrical connection. 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 Mazda indicates Ignition Coil Primary Circuit Fault Cylinder 1.
Common causes: Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 circuit poor electrical connection.
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.

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Code Popularity 16,552

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0351 Mazda Description

The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.

OBDII Code P0351 Mazda - Ignition Coil Primary Circuit Fault Cylinder 1 - AutoCodes.com — P0351 Mazda Code - Ignition Coil Primary Circuit Fault Cylinder 1

What does this mean?

What are the Possible Causes of the DTC P0351 Mazda?

Faulty Ignition Coil 1
Ignition Coil 1 harness is open or shorted
Ignition Coil 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0351 Mazda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0351 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0351 Mazda code?

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

Need Help with the Code?

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

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 Mazda Code

1. What are the common symptoms of OBDII code P0351 in a Mazda related to the Ignition Coil Primary Circuit Fault Cylinder 1?

- Common symptoms include engine misfires, rough idling, lack of power, and illuminated Check Engine Light.

2. What are the possible causes of OBDII code P0351 in a Mazda?

- The code P0351 typically indicates a faulty ignition coil, wiring issues in the primary circuit, or a problem with the PCM (Powertrain Control Module).

3. How can I diagnose the Ignition Coil Primary Circuit Fault Cylinder 1 issue in my Mazda?

- You can use a multimeter to test the resistance of the ignition coil, check the wiring for any signs of damage, and perform a visual inspection of the cylinder 1 ignition coil.

4. Can a faulty spark plug cause OBDII code P0351 to appear in a Mazda?

- Yes, a faulty spark plug can cause misfires that may trigger the P0351 code. It is recommended to inspect and replace spark plugs if needed.

5. Is it safe to continue driving my Mazda with the Ignition Coil Primary Circuit Fault Cylinder 1 issue?

- It is not recommended to drive the vehicle for an extended period with this issue as it can lead to further damage to the engine and other components.

6. How much does it typically cost to repair OBDII code P0351 in a Mazda?

- The cost of repairing the Ignition Coil Primary Circuit Fault Cylinder 1 issue can vary depending on the exact cause, but it may range from $100 to $300 for parts and labor.

7. Can I reset the Check Engine Light related to code P0351 in my Mazda without fixing the issue?

- Resetting the Check Engine Light without addressing the underlying problem will not resolve the issue, and the light is likely to come back on once the problem persists.

8. Are there any preventive measures to avoid encountering OBDII code P0351 in a Mazda?

- Regular maintenance, such as routine inspection of ignition components and replacing spark plugs at recommended intervals, can help prevent issues that may trigger the P0351 code.

9. How long does it typically take to repair the Ignition Coil Primary Circuit Fault Cylinder 1 issue in a Mazda?

- The repair time can vary depending on the exact cause of the problem and the availability of parts, but it generally takes a few hours to complete the repair.

10. Can I troubleshoot and repair OBDII code P0351 in my Mazda myself, or should I seek professional help?

- While some DIY enthusiasts may be able to diagnose and address the issue themselves, it is recommended to seek professional help, especially if you are not familiar with automotive electrical systems.