AutoCodes – Scion – P0354 2005 Scion xB

P0354 2005 Scion xB Code - Ignition Coil 4 Primary/Secondary Circuit

Quick Answer

A Direct Ignition System (DIS) is used on this vehicle. 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 Scion xB 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 2,914

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 P0354 2005 Scion xB Description

A Direct Ignition System (DIS) is used on this vehicle. The DIS is a 1-cylinder ignition system in which each cylinder is ignited by 1 ignition coil, and 1 spark plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring, is applied directly to each spark plug. The sparks of the spark plugs pass from the center electrodes to the ground electrodes. The ECM determines the ignition timing and transmits the ignition (IGT) signals to each cylinder. Using the IGT signal, the ECM turns the power transistor inside the igniter on and off. The power transistor, in turn, switches on and off the current to the primary coil. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing them to spark inside the cylinders. As the ECM cuts the current to the primary coil, the igniter sends back an ignition confirmation(IGF) signal to the ECM, for each cylinder ignition.

OBDII Code P0354 2005 Scion xB - Ignition Coil 4 Primary/Secondary Circuit - AutoCodes.com — P0354 2005 Scion xB Code - Ignition Coil 4 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0354 2005 Scion xB?

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 Scion xB?

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 Scion xB 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 Scion xB code?

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

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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 P0354 2005 Scion xB Code

1. What does OBDII code P0354 on a 2005 Scion xB mean?

The code P0354 indicates a problem with the Ignition Coil 4 Primary/Secondary Circuit in the ignition system of the vehicle.

2. What are the common symptoms of OBDII code P0354 in a 2005 Scion xB?

Common symptoms of code P0354 may include engine misfires, rough idling, lack of power, and potentially stalling of the vehicle.

3. What are the possible causes of OBDII code P0354 in a 2005 Scion xB?

Common causes of code P0354 can include a faulty ignition coil, damaged wiring or connectors in the ignition coil circuit, or an issue with the engine control module (ECM).

4. How can I diagnose the issue related to OBDII code P0354 on my 2005 Scion xB?

Diagnosing code P0354 may involve inspecting the ignition coil, checking the wiring and connectors for damage, and using a scan tool to monitor the ignition coil's operation.

5. Can I still drive my 2005 Scion xB with OBDII code P0354?

It is not recommended to drive your vehicle with code P0354 present, 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 OBDII code P0354 on my 2005 Scion xB?

Repairing code P0354 may involve replacing the faulty ignition coil, repairing any damaged wiring or connectors, or reprogramming the engine control module if necessary.

7. Are there any tips for preventing OBDII code P0354 from appearing in my 2005 Scion xB?

Regular maintenance, such as inspecting and replacing ignition components at recommended intervals, can help prevent issues like code P0354 from occurring.

8. Is it possible to reset OBDII code P0354 on a 2005 Scion xB without fixing the underlying issue?

While you can clear the code with a scan tool, it is essential to address the root cause of the problem to prevent the code from reappearing.

9. Can a DIY enthusiast fix OBDII code P0354 on a 2005 Scion xB?

Depending on your experience and tools available, you may be able to replace the ignition coil yourself. However, diagnosing and repairing wiring or ECM issues may require professional assistance.

10. How much does it cost to fix OBDII code P0354 on a 2005 Scion xB?

The cost of fixing code P0354 can vary depending on the cause of the issue, the parts needed, and whether you choose to do the repairs yourself or take your vehicle to a mechanic.