AutoCodes – Scion – P0354 2007 Scion xB

P0354 2007 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 2007 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 2,460

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 2007 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 2007 Scion xB - Ignition Coil 4 Primary/Secondary Circuit - AutoCodes.com — P0354 2007 Scion xB Code - Ignition Coil 4 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0354 2007 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 2007 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 2007 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 2007 Scion xB code?

Need more information on how to fix the P0354 2007 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 2007 Scion xB Code

1. What are the common symptoms of OBDII code P0354 in a 2007 Scion xB?

- Common symptoms include engine misfires, rough idling, lack of power, and potential stalling.

2. What does OBDII code P0354 indicate in a 2007 Scion xB?

- OBDII code P0354 indicates a problem with the Ignition Coil 4 Primary/Secondary Circuit.

3. What are the possible causes of OBDII code P0354 in a 2007 Scion xB?

- Possible causes include a faulty ignition coil, wiring issues in the ignition coil circuit, or a problem with the ECM.

4. How can I diagnose the issue causing OBDII code P0354 in my 2007 Scion xB?

- You can use a multimeter to test the ignition coil, check the wiring for any damage, and inspect the connectors for proper connection.

5. Can I still drive my 2007 Scion xB with OBDII code P0354?

- It is not recommended to drive your vehicle with OBDII code P0354 as it can lead to further damage and potential safety risks.

6. How can I repair OBDII code P0354 in my 2007 Scion xB?

- The repair typically involves replacing the faulty ignition coil, repairing any damaged wiring, or reprogramming the ECM if necessary.

7. Is it possible to reset OBDII code P0354 in a 2007 Scion xB without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it will likely reappear until the root cause is addressed.

8. Are there any preventive measures to avoid OBDII code P0354 in a 2007 Scion xB?

- Regular maintenance, such as checking and replacing ignition components as needed, can help prevent OBDII code P0354 from occurring.

9. How much does it cost to fix OBDII code P0354 in a 2007 Scion xB?

- The cost of fixing OBDII code P0354 can vary depending on the extent of the issue, but it typically ranges from $100 to $300 for parts and labor.

10. Can a DIY enthusiast repair OBDII code P0354 in a 2007 Scion xB?

- While some may attempt to repair OBDII code P0354 themselves, it is recommended to have a professional diagnose and fix the issue to ensure proper repair and safety.