AutoCodes – Toyota – P0354 2005 Toyota Highlander

P0354 2005 Toyota Highlander Code - Ignition Coil 4 Primary/Secondary Circuit

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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: P0354 2005 Toyota Highlander indicates Ignition Coil 4 Primary/Secondary Circuit.
Common causes: Common causes include Faulty Ignition Coil 4, Ignition Coil 4 harness is open or shorted, Ignition Coil 4 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 3,341

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
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0354 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 P0354 2005 Toyota Highlander - Ignition Coil 4 Primary/Secondary Circuit - AutoCodes.com — P0354 2005 Toyota Highlander Code - Ignition Coil 4 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0354 2005 Toyota Highlander?

Faulty Ignition Coil 4
Ignition Coil 4 harness is open or shorted
Ignition Coil 4 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0354 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 P0354 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 P0354 2005 Toyota Highlander code?

Need more information on how to fix the P0354 2005 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0354 2005 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area

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 P0354 2005 Toyota Highlander Code

1. What does OBDII code P0354 for a 2005 Toyota Highlander mean?

The code P0354 indicates a problem with the ignition coil 4 primary/secondary circuit in your vehicle.

2. What are common symptoms of OBDII code P0354 in a 2005 Toyota Highlander?

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

3. What are possible causes of OBDII code P0354 in a 2005 Toyota Highlander?

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

4. How can I diagnose the issue related to OBDII code P0354 in my 2005 Toyota Highlander?

You can use a diagnostic scanner to read the code, inspect the wiring and connectors for damage, test the ignition coil, and check for any other related issues in the circuit.

5. Can I continue driving my 2005 Toyota Highlander with OBDII code P0354?

It is not recommended to drive your vehicle with this code as it can lead to further engine damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P0354 in my 2005 Toyota Highlander?

You may need to replace the faulty ignition coil, repair any damaged wiring or connectors, or reset the ECM to clear the code.

7. Are there any tips to prevent OBDII code P0354 from recurring in my 2005 Toyota Highlander?

Regularly maintaining your vehicle, checking the ignition system components, and addressing any issues promptly can help prevent the code from reoccurring.

8. Can a DIY enthusiast fix OBDII code P0354 in a 2005 Toyota Highlander?

Depending on your skill level and access to tools, you may be able to address the issue yourself by following repair guides or seeking assistance from online forums.

9. How much does it typically cost to repair OBDII code P0354 in a 2005 Toyota Highlander?

The cost can vary depending on the specific issue, but it may involve expenses for parts, labor, and diagnostic services from a mechanic or dealership.

10. Is it necessary to clear the OBDII code P0354 after repairing the issue in a 2005 Toyota Highlander?

Yes, it is recommended to clear the code using a diagnostic scanner after fixing the problem to reset the system and ensure the issue has been resolved.