AutoCodes – Acura – P0351 Acura

P0351 Acura 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 Acura 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 6,054

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
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Code P0351 Acura 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 Acura - No. 1 Cylinder Ignition Coil Circuit Malfunction - AutoCodes.com — P0351 Acura Code - No. 1 Cylinder Ignition Coil Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0351 Acura?

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 Acura?

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 Acura 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.

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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.