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AutoCodes – Scion – P0351 2007 Scion xB

P0351 2007 Scion xB Code - Ignition Coil 1 Primary/Secondary Circuit

Quick Answer

A Direct Ignition System (DIS) is used on this vehicle. Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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
P0351 2007 Scion xB indicates Ignition Coil 1 Primary/Secondary Circuit.
Common causes
Common causes include Faulty Ignition Coil 1, Ignition Coil 1 harness is open or shorted, Ignition Coil 1 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 2,940
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0351 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 P0351 2007 Scion xB - Ignition Coil 1 Primary/Secondary Circuit - AutoCodes.com
P0351 2007 Scion xB Code - Ignition Coil 1 Primary/Secondary Circuit
What does this mean?

What are the Possible Causes of the DTC P0351 2007 Scion xB?

  • Faulty Ignition Coil 1
  • Ignition Coil 1 harness is open or shorted
  • Ignition Coil 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0351 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 P0351 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 P0351 2007 Scion xB code?

Need more information on how to fix the P0351 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 P0351 2007 Scion xB Code

1. What does the OBDII code P0351 mean on a 2007 Scion xB?

P0351 indicates a malfunction in the primary or secondary circuit of ignition coil 1, which could affect the vehicle's ignition system.

2. What are the common symptoms of code P0351 in a 2007 Scion xB?

Symptoms may include engine misfires, rough idling, poor acceleration, reduced fuel efficiency, and the Check Engine Light turning on.

3. What causes the P0351 code in a 2007 Scion xB?

Common causes include a faulty ignition coil, damaged spark plug wires, poor electrical connections, or a malfunctioning engine control module (ECM).

4. Can I drive my 2007 Scion xB with a P0351 code?

It’s not recommended to drive with this code active, as it can lead to further engine damage and poor performance.

5. How do I diagnose the P0351 code on a 2007 Scion xB?

Diagnosis involves checking the ignition coil, inspecting the wiring harness, testing the spark plug, and verifying the ECM signals.

6. How can I fix the P0351 code in a 2007 Scion xB?

Repairs may include replacing the faulty ignition coil, repairing or replacing damaged wiring, or addressing issues with the spark plugs or ECM.

7. How much does it cost to repair a P0351 code on a 2007 Scion xB?

Repair costs vary but may range from $100 to $300 for parts and labor, depending on the exact issue.

8. How do I know if the ignition coil needs replacing for a P0351 code?

If testing shows the ignition coil isn’t producing proper voltage or has continuity issues, it likely needs replacement.

9. Can a bad spark plug cause the P0351 code on a 2007 Scion xB?

Yes, a bad spark plug can cause misfires that trigger the P0351 code due to stress on the ignition coil.

10. Will clearing the P0351 code solve the problem in my 2007 Scion xB?

Clearing the code will turn off the Check Engine Light temporarily, but the underlying issue must be repaired to prevent the code from returning.

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