AutoCodes – Generic – P0351

P0351 Code - Ignition Coil 1 Control Circuit

Quick Answer

The ignition system on this engine uses ignition coils with integrated power transistors. 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 indicates Ignition Coil 1 Control Circuit.
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 80,713

How popular is this code, among other codes? Medium

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 16, 2022

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

The ignition system on this engine uses ignition coils with integrated power transistors. The Engine Control Module (ECM) controls the spark event for each cylinder through individual ignition coil control circuits. When the ECM commands the ignition control circuit On, electrical current flows through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM commands the ignition control circuit Off, interrupting current flow through the primary winding. The collapsing magnetic field created by the primary winding induces a high voltage in the secondary winding, which is connected to the spark plugs. The Diagnostic Trouble Code (DTC) will be set when the control circuit commanded by the ECM state does not match the actual state.

OBDII Code P0351 - Ignition Coil 1 Control Circuit - AutoCodes.com — P0351 Code - Ignition Coil 1 Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0351?

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?

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 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 code?

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

Need Help with the Code?

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

Information for Specific Makes

P0351 Acura — No. 1 Cylinder Ignition Coil Circuit Malfunction
P0351 Audi — Ignition Coil 1 Primary/Secondary Circuit
P0351 BMW — Ignition Coil Cylinder 1
P0351 Buick — Ignition Coil 1 Control Circuit
P0351 Cadillac — Ignition Coil 1 Control Circuit
P0351 Chevrolet — Ignition Coil 1 Control Circuit
P0351 Chrysler — Ignition Coil 1 Circuit
P0351 Dodge — Ignition Coil 1 Circuit
P0351 Ford — Ignition Coil 'A' Primary/Secondary Circuit
P0351 GMC — Ignition Coil 1 Control Circuit
P0351 Honda — No. 1 Cylinder Ignition Coil Circuit Malfunction
P0351 Hyundai — Ignition Coil 'A' Primary/Secondary Circuit
P0351 Isuzu — Ignition Coil 1 Control Circuit
P0351 Jaguar — Ignition Coil 'A' Primary/Secondary Circuit
P0351 Jeep — Ignition Coil 1 Circuit
P0351 KIA — Ignition Coil 1 Primary/Secondary Circuit
P0351 Lexus — Ignition Coil 1 Primary/Secondary Circuit
P0351 Lincoln — Ignition Coil 1 Control Circuit
P0351 Mazda — Ignition Coil Primary Circuit Fault Cylinder 1
P0351 Mercedes-Benz — Ignition Coil 1 Primary/Secondary Circuit Malfunction
P0351 Mercury — Ignition Coil 1 Control Circuit
P0351 MINI — Ignition Coil Cylinder 1
P0351 Pontiac — Ignition Coil 1 Control Circuit
P0351 Saturn — Ignition Coil 1 Control Circuit
P0351 Scion — Ignition Coil 1 Primary/Secondary Circuit
P0351 Toyota — Ignition Coil 1 Primary/Secondary Circuit
P0351 Volkswagen — Ignition Coil 1 Primary/Secondary Circuit

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 Code

1. What are common symptoms of OBDII code P0351 (Ignition Coil 1 Control Circuit)?

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

2. What are potential causes of OBDII code P0351?

- Potential causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or issues with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P0351?

- Diagnose by checking the ignition coil for signs of damage, inspecting the wiring and connectors for any issues, and using a scan tool to analyze the ECM data.

4. Can a bad spark plug cause OBDII code P0351 to trigger?

- Yes, a bad spark plug can cause the ignition coil to malfunction, leading to the triggering of OBDII code P0351.

5. What is the recommended repair for OBDII code P0351?

- The recommended repair is to replace the faulty ignition coil, repair any damaged wiring or connectors, and clear the trouble codes from the ECM.

6. Are there any tips for preventing OBDII code P0351 from recurring?

- Regular maintenance of the ignition system, including replacing spark plugs and ignition coils at recommended intervals, can help prevent OBDII code P0351 from recurring.

7. Can driving with OBDII code P0351 cause further damage to the vehicle?

- Continuing to drive with OBDII code P0351 can potentially lead to more severe engine issues, such as catalytic converter damage or permanent engine misfires.

8. How long does it typically take to repair OBDII code P0351?

- The repair time for OBDII code P0351 can vary depending on the exact cause, but it generally takes around 1-2 hours for diagnosis and replacement of the faulty components.

9. Is it safe to drive my vehicle with OBDII code P0351?

- It is not recommended to drive the vehicle with OBDII code P0351, as it can lead to performance issues and further damage to the engine if left unresolved.

10. Can a DIY enthusiast repair OBDII code P0351, or is professional assistance necessary?

- While some experienced DIY enthusiasts may be able to replace the ignition coil themselves, it is recommended to seek professional assistance for proper diagnosis and repair of OBDII code P0351 to ensure the issue is resolved correctly.