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P0355 Toyota Code - Ignition Coil 5 Primary/Secondary Circuit

Quick Answer

The P0355 code for Toyota vehicles indicates a problem with the ignition coil for cylinder 5 in the engine's primary/secondary circuit. Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Malfunctioning engine control module (ECM). 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
P0355 Toyota indicates Ignition Coil 5 Primary/Secondary Circuit.
Common causes
Common causes include Faulty ignition coil, Damaged wiring or connectors in the ignition coil circuit, Malfunctioning engine control module (ECM).
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0355 Toyota Description

The P0355 code for Toyota vehicles indicates a problem with the ignition coil for cylinder 5 in the engine's primary/secondary circuit. The ignition coil is a crucial component of the ignition system that generates the high voltage needed to ignite the air-fuel mixture in the combustion chamber. When this code is triggered, it means that there is a malfunction in the ignition coil circuit for cylinder 5, which can lead to misfires, poor engine performance, and potential damage to other engine components if not addressed promptly.

OBDII Code P0355 Toyota - Ignition Coil 5 Primary/Secondary Circuit
P0355 Toyota Code - Ignition Coil 5 Primary/Secondary Circuit

Common Causes of P0355 Toyota

  1. Faulty ignition coil
  2. Damaged wiring or connectors in the ignition coil circuit
  3. Malfunctioning engine control module (ECM)
  4. Defective spark plug
  5. Vacuum leak affecting cylinder 5

Symptoms of P0355 Toyota

  1. Engine misfires
  2. Rough idling
  3. Loss of power
  4. Reduced fuel efficiency
  5. Illuminated check engine light

How to Fix P0355 Toyota

  1. Diagnose the issue using a scan tool to confirm the P0355 code and identify the specific cylinder affected.
  2. Inspect the ignition coil for cylinder 5, along with the wiring and connectors for any signs of damage or corrosion.
  3. Test the ignition coil for proper resistance and voltage output to determine if it is functioning correctly.
  4. Replace the ignition coil if it is found to be faulty, ensuring proper installation and connection.
  5. Clear the diagnostic trouble codes and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0355 Toyota

The cost of repairing the ignition coil 5 primary/secondary circuit issue can vary depending on the specific vehicle make and model, as well as the labor rates in your area. Typically, the cost of a new ignition coil for a Toyota vehicle ranges from $50 to $150, with additional costs for labor ranging from $100 to $200. Overall, the total repair cost for this issue could range from $150 to $350 or more. It's important to note that these are rough estimates, and actual costs may vary based on individual circumstances. It's recommended to consult with a professional mechanic for a more accurate cost estimate based on your specific situation.

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Information for Specific Toyota Models

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 P0355 Toyota Code

1. What are the common symptoms of OBDII code P0355 in a Toyota related to Ignition Coil 5 Primary/Secondary Circuit?

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

2. What are the possible causes of OBDII code P0355 in a Toyota related to Ignition Coil 5 Primary/Secondary Circuit?

Possible causes include a faulty ignition coil, damaged wiring or connectors, a defective PCM, or a problem with the spark plug.

3. How can I diagnose the issue causing OBDII code P0355 in my Toyota related to Ignition Coil 5 Primary/Secondary Circuit?

Diagnosis involves using a multimeter to test the ignition coil, inspecting the wiring and connectors for damage, and checking the spark plug for signs of wear or fouling.

4. Can I still drive my Toyota with OBDII code P0355 related to Ignition Coil 5 Primary/Secondary Circuit?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the engine and catalytic converter.

5. How can I repair OBDII code P0355 in my Toyota related to Ignition Coil 5 Primary/Secondary Circuit?

Repair options include replacing the faulty ignition coil, repairing any damaged wiring or connectors, and ensuring proper spark plug installation.

6. Is it necessary to reset the OBDII code P0355 in my Toyota after repairing the issue related to Ignition Coil 5 Primary/Secondary Circuit?

Yes, it is important to reset the code using an OBDII scanner after repairing the underlying issue to clear the Check Engine Light.

7. What are some preventive maintenance tips to avoid OBDII code P0355 in a Toyota related to Ignition Coil 5 Primary/Secondary Circuit?

Regularly inspecting and replacing spark plugs, ensuring proper ignition coil function, and maintaining a clean and efficient engine can help prevent this code.

8. Can a DIY enthusiast fix OBDII code P0355 related to Ignition Coil 5 Primary/Secondary Circuit in a Toyota?

Yes, with the right tools and knowledge, a DIY enthusiast can diagnose and repair this issue, but it is recommended to consult a professional if unsure.

9. How long does it typically take to repair OBDII code P0355 related to Ignition Coil 5 Primary/Secondary Circuit in a Toyota?

The repair time can vary depending on the exact cause of the issue, but it usually takes anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Are there any recalls or technical service bulletins related to OBDII code P0355 in Toyota vehicles regarding Ignition Coil 5 Primary/Secondary Circuit?

It's recommended to check with Toyota dealerships or visit the NHTSA website to see if there are any recalls or technical service bulletins related to this specific OBDII code.

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