AutoCodes – Toyota – P0356 2001 Toyota Highlander

P0356 2001 Toyota Highlander Code - Ignition Coil 6 Primary/Secondary Circuit

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 6 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: P0356 2001 Toyota Highlander indicates Ignition Coil 6 Primary/Secondary Circuit.
Common causes: Common causes include Faulty Ignition Coil 6, Ignition Coil 6 harness is open or shorted, Ignition Coil 6 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 2,554

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0356 2001 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 P0356 2001 Toyota Highlander - Ignition Coil 6 Primary/Secondary Circuit - AutoCodes.com — P0356 2001 Toyota Highlander Code - Ignition Coil 6 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0356 2001 Toyota Highlander?

Faulty Ignition Coil 6
Ignition Coil 6 harness is open or shorted
Ignition Coil 6 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0356 2001 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 P0356 2001 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 P0356 2001 Toyota Highlander code?

Need more information on how to fix the P0356 2001 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0356 2001 Toyota Highlander Code

1. What does OBDII code P0356 for a 2001 Toyota Highlander indicate?

The code P0356 specifically points to an issue with the Ignition Coil 6 Primary/Secondary Circuit.

2. What are some common symptoms of a P0356 OBDII code in a 2001 Toyota Highlander?

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

3. What are the possible causes of a P0356 OBDII code in a 2001 Toyota Highlander?

The code can be triggered by a faulty ignition coil, wiring issues in the ignition coil circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the source of a P0356 OBDII code in my 2001 Toyota Highlander?

You can perform a visual inspection of the ignition coil and its wiring, test the coil using a multimeter, check for loose connections, and scan for any related codes in the ECM.

5. Can I still drive my 2001 Toyota Highlander with a P0356 OBDII code?

It is not recommended to continue driving your vehicle with a P0356 code, as it can lead to more severe issues and potential damage to the engine over time.

6. How can I repair a P0356 OBDII code in my 2001 Toyota Highlander?

To address the P0356 code, you may need to replace the faulty ignition coil, repair any damaged wiring, or reprogram the ECM if necessary.

7. Is it possible to prevent the recurrence of a P0356 OBDII code in my 2001 Toyota Highlander?

Regularly inspecting and maintaining your ignition system, including checking the condition of ignition coils and wiring, can help prevent the reoccurrence of a P0356 code.

8. Can a DIY enthusiast fix a P0356 OBDII code in a 2001 Toyota Highlander?

Depending on your skill level and access to tools, you may be able to address the P0356 code yourself by following repair guides and tutorials specific to your vehicle.

9. How long does it typically take to repair a P0356 OBDII code in a 2001 Toyota Highlander?

The repair time can vary based on the exact cause of the code, but replacing an ignition coil or repairing wiring issues typically takes a few hours to complete.

10. Should I reset the OBDII system after repairing a P0356 code on my 2001 Toyota Highlander?

Yes, it is recommended to clear the OBDII system memory after resolving the P0356 code to ensure that the issue has been successfully addressed and to reset the Check Engine Light.