AutoCodes – Toyota – P0351 2002 Toyota Highlander

P0351 2002 Toyota Highlander Code - Ignition Coil 1 Primary/Secondary Circuit

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 2002 Toyota Highlander indicates Ignition Coil 1 Primary/Secondary 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 2,280

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 Mar 29, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0351 2002 Toyota Highlander 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 2002 Toyota Highlander - Ignition Coil 1 Primary/Secondary Circuit - AutoCodes.com — P0351 2002 Toyota Highlander Code - Ignition Coil 1 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0351 2002 Toyota Highlander?

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 2002 Toyota Highlander?

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 2002 Toyota Highlander 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 2002 Toyota Highlander code?

Need more information on how to fix the P0351 2002 Toyota Highlander code? Get Access to Factory Service Manuals

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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.

Frequently Asked Questions about P0351 2002 Toyota Highlander Code

1. What does OBDII code P0351 for a 2002 Toyota Highlander indicate?

Code P0351 indicates a problem with the ignition coil 1 primary/secondary circuit in the engine.

2. What are the common symptoms of a P0351 error code in a Toyota Highlander?

Common symptoms include engine misfires, rough idling, loss of power, and difficulty starting the vehicle.

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

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

4. How can I diagnose a P0351 error code in my 2002 Toyota Highlander?

Diagnosing a P0351 code involves checking the ignition coil and its connections, inspecting the spark plug, testing the wiring for continuity, and scanning the ECM for other related error codes.

5. Can I still drive my Toyota Highlander with a P0351 error code?

It is not recommended to drive your vehicle with a P0351 error code, as it can lead to further engine damage and reduced performance.

6. How can I repair a P0351 error code in my Toyota Highlander?

Repairing a P0351 code may involve replacing the faulty ignition coil, repairing damaged wiring, replacing the spark plug, or resetting the ECM after addressing the underlying issue.

7. Is it necessary to clear the P0351 error code after making repairs to my Toyota Highlander?

Yes, it is important to clear the error code using an OBDII scanner after resolving the underlying issue to reset the ECM and ensure the problem has been successfully addressed.

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

While some basic diagnostics and repairs can be done by DIY enthusiasts, diagnosing and fixing complex issues related to the ignition system may require professional assistance.

9. How much does it cost to repair a P0351 error code in a 2002 Toyota Highlander?

The cost of repairing a P0351 code can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

10. How can I prevent a P0351 error code from occurring in my Toyota Highlander?

Regular maintenance, such as inspecting and replacing spark plugs, checking ignition components, and following the manufacturer's recommended service schedule, can help prevent P0351 and other related error codes in your Toyota Highlander.