AutoCodes – Toyota – P0356 2005 Toyota Highlander

P0356 2005 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 2005 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 5,128

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 2005 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 2005 Toyota Highlander - Ignition Coil 6 Primary/Secondary Circuit - AutoCodes.com — P0356 2005 Toyota Highlander Code - Ignition Coil 6 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0356 2005 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 2005 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 2005 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 2005 Toyota Highlander code?

Need more information on how to fix the P0356 2005 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 2005 Toyota Highlander Code

1. What does OBDII code P0356 for a 2005 Toyota Highlander mean?

The code P0356 indicates a problem with the ignition coil 6 primary/secondary circuit in your Highlander.

2. What are the common symptoms of a P0356 error code?

Common symptoms of a P0356 code may include engine misfires, rough idling, decreased fuel efficiency, and potential stalling of the vehicle.

3. What are the possible causes of a P0356 code in a 2005 Toyota Highlander?

Potential causes of a P0356 code include a faulty ignition coil, wiring issues in the ignition coil circuit, a defective powertrain control module (PCM), or a poor electrical connection.

4. How can I diagnose a P0356 error code in my Toyota Highlander?

To diagnose a P0356 code, you can use a scan tool to check for the specific code, visually inspect the ignition coil and its wiring for any damage, and perform a circuit test to identify any electrical issues.

5. Can I continue driving my Toyota Highlander with a P0356 code?

It is not recommended to drive your Highlander with a P0356 code, as it can lead to further damage to the engine and other components. It is best to address the issue promptly.

6. How can I repair a P0356 code in my 2005 Toyota Highlander?

Repairing a P0356 code may involve replacing the faulty ignition coil, repairing or replacing damaged wiring, ensuring proper electrical connections, or replacing the PCM if necessary.

7. Are there any preventive measures to avoid a P0356 code in my Toyota Highlander?

To prevent a P0356 code, it is important to maintain regular vehicle inspections, address any ignition system issues promptly, and follow the manufacturer's recommended maintenance schedule.

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

While some DIY enthusiasts may be able to address a P0356 code by replacing the ignition coil or checking the wiring, it is recommended to consult a professional mechanic for proper diagnosis and repair.

9. How much does it typically cost to repair a P0356 code in a 2005 Toyota Highlander?

The cost of repairing a P0356 code in a Toyota Highlander can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

10. Will resetting the OBDII system clear a P0356 code in my Toyota Highlander?

Resetting the OBDII system may temporarily clear the P0356 code, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and fix the root cause of the problem.