AutoCodes – Honda – P0351 2021 Honda CR-V

P0351 2021 Honda CR-V Code - No. 1 Cylinder Ignition Coil Circuit Malfunction

Quick Answer

The ignition coil is a part of the engine ignition system. Common causes include Faulty No, 1 Ignition Coil, No. 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 2021 Honda CR-V indicates No. 1 Cylinder Ignition Coil Circuit Malfunction.
Common causes: Common causes include Faulty No, 1 Ignition Coil, No.
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 416

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 Aug 17, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0351 2021 Honda CR-V Description

The ignition coil is a part of the engine ignition system. It converts low voltage from the battery into high voltage needed to create a spark in the spark plugs. The ignition coil is triggered at the optimum time by the Powertrain Control Module (PCM) ON/OFF command. The PCM detects a malfunction when the engine is running and the return signal does not change for a specified time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0351 2021 Honda CR-V - No. 1 Cylinder Ignition Coil Circuit Malfunction - AutoCodes.com — P0351 2021 Honda CR-V Code - No. 1 Cylinder Ignition Coil Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0351 2021 Honda CR-V?

Faulty No. 1 Ignition Coil
No. 1 Ignition Coil harness is open or shorted
No. 1 Ignition Coil circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0351 2021 Honda CR-V?

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 2021 Honda CR-V 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 2021 Honda CR-V code?

Need more information on how to fix the P0351 2021 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0351 2021 Honda CR-V 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 2021 Honda CR-V Code

What does the OBDII code P0351 mean on a 2021 Honda CR-V?

P0351 indicates a malfunction in the ignition coil circuit for cylinder 1, meaning the ECU has detected an issue with the signal sent to or from the ignition coil.

What are the symptoms of code P0351 in a 2021 Honda CR-V?

Common symptoms include engine misfires, rough idling, reduced power, poor fuel efficiency, and possibly an illuminated Check Engine Light.

What causes the P0351 code to appear?

Possible causes include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, a malfunctioning ECU, or issues with the spark plug in cylinder 1.

Can I drive my 2021 Honda CR-V with a P0351 code?

Driving with a P0351 code is not recommended, as it can lead to engine misfires, reduced performance, and potential damage to the catalytic converter if left unresolved.

How do I diagnose the P0351 code?

Start by inspecting the ignition coil, spark plug, and wiring for damage or wear. Use a multimeter to test the ignition coil and wiring continuity, and consider swapping the coil with another cylinder to see if the issue moves.

How do I fix the P0351 code?

Repairs may include replacing the ignition coil or spark plug for cylinder 1, repairing damaged wiring or connectors, or, in rare cases, replacing the ECU.

How much does it cost to fix code P0351 on a 2021 Honda CR-V?

Repair costs can vary but typically range from $100 to $300 for parts and labor, depending on whether the ignition coil, spark plug, or wiring needs replacement.

Can a dirty spark plug cause the P0351 code?

Yes, a dirty or worn spark plug in cylinder 1 can cause ignition issues, potentially triggering the P0351 code.

Will clearing the P0351 code fix the problem?

Clearing the code will reset the Check Engine Light, but the underlying issue must be fixed to prevent the code from returning.

Is the P0351 code common in Honda CR-V models?

While not extremely common, ignition coil circuit malfunctions like P0351 can occur due to wear and tear or electrical issues, especially as the vehicle ages.