AutoCodes – Toyota – P0356 2002 Toyota Highlander

P0356 2002 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 2002 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 3,074

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 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 P0356 2002 Toyota Highlander - Ignition Coil 6 Primary/Secondary Circuit - AutoCodes.com — P0356 2002 Toyota Highlander Code - Ignition Coil 6 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0356 2002 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 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 P0356 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 P0356 2002 Toyota Highlander code?

Need more information on how to fix the P0356 2002 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 2002 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0356 in a 2002 Toyota Highlander?

- Common symptoms include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What does OBDII code P0356 on a 2002 Toyota Highlander indicate?

- OBDII code P0356 indicates a problem with the ignition coil 6 primary/secondary circuit.

3. What are the possible causes of OBDII code P0356 in a 2002 Toyota Highlander?

- Possible causes include a faulty ignition coil, wiring issues, poor electrical connections, or a damaged PCM.

4. How can I diagnose the issue causing OBDII code P0356 in my 2002 Toyota Highlander?

- You can diagnose the issue by checking the ignition coil, inspecting the wiring and connectors, and performing a thorough visual inspection.

5. How can I repair OBDII code P0356 in my 2002 Toyota Highlander?

- Repair options include replacing the faulty ignition coil, repairing damaged wiring or connectors, and clearing the trouble code with an OBDII scanner.

6. Can I drive my 2002 Toyota Highlander with OBDII code P0356?

- It is not recommended to drive your vehicle with OBDII code P0356, as it can lead to further damage and potential safety hazards.

7. How much does it typically cost to repair OBDII code P0356 in a 2002 Toyota Highlander?

- The cost of repair can vary depending on the underlying issue, but it may range from $100 to $300 for parts and labor.

8. Are there any preventive maintenance tips to avoid OBDII code P0356 in my 2002 Toyota Highlander?

- Regularly inspecting and maintaining the ignition system, including the ignition coils and wiring, can help prevent issues that trigger code P0356.

9. Can a DIY enthusiast fix OBDII code P0356 in a 2002 Toyota Highlander?

- While some experienced DIY enthusiasts may be able to diagnose and replace the faulty components, it is recommended to consult a professional mechanic for proper repair.

10. How long does it take to repair OBDII code P0356 in a 2002 Toyota Highlander?

- The repair time can vary based on the specific issue, but it typically takes around 1 to 2 hours for a mechanic to diagnose and fix the problem related to code P0356.