AutoCodes – Scion – P0351 2005 Scion xB

P0351 2005 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 2005 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 3,019

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0351 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 P0351 2005 Scion xB - Ignition Coil 1 Primary/Secondary Circuit - AutoCodes.com — P0351 2005 Scion xB Code - Ignition Coil 1 Primary/Secondary Circuit

What does this mean?

What are the Possible Causes of the DTC P0351 2005 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 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 P0351 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.

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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 2005 Scion xB Code

1. What are the common symptoms of OBDII code P0351 in a 2005 Scion xB?

The common symptoms of P0351 in a 2005 Scion xB include engine misfires, rough idling, poor fuel efficiency, and difficulty starting the vehicle.

2. What does the OBDII code P0351 on a 2005 Scion xB indicate?

P0351 indicates a problem with the ignition coil 1 primary/secondary circuit in a 2005 Scion xB, specifically relating to the electrical circuit of the ignition coil for cylinder 1.

3. What are the possible causes of OBDII code P0351 in a 2005 Scion xB?

Possible causes of P0351 in a 2005 Scion xB 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 OBDII code P0351 on a 2005 Scion xB?

To diagnose P0351 in a 2005 Scion xB, you can use a scan tool to check for other related trouble codes, visually inspect the ignition coil and its connections, and perform tests to check the coil's resistance.

5. Can I still drive my 2005 Scion xB with OBDII code P0351?

It is not recommended to drive your 2005 Scion xB with P0351 as it can lead to further damage to the ignition system and potentially cause more severe issues with the engine's performance.

6. How do I repair OBDII code P0351 on a 2005 Scion xB?

To repair P0351 in a 2005 Scion xB, you may need to replace the faulty ignition coil, repair any damaged wiring or connectors in the circuit, or reset the ECM to clear the code.

7. Is it possible to prevent OBDII code P0351 from occurring in a 2005 Scion xB?

While some cases of P0351 are due to wear and tear, regular maintenance, such as timely replacement of spark plugs and ignition components, can help prevent this code from occurring in a 2005 Scion xB.

8. Can a DIY enthusiast fix OBDII code P0351 on a 2005 Scion xB?

Depending on your mechanical skills and access to tools, a DIY enthusiast may be able to fix P0351 by following repair guides and using the necessary equipment to diagnose and replace the faulty ignition coil.

9. How much does it typically cost to repair OBDII code P0351 on a 2005 Scion xB?

The cost of repairing P0351 in a 2005 Scion xB can vary depending on the extent of the damage, the cost of parts, and labor rates. On average, the repair cost may range from $100 to $300.

10. Can a bad ignition coil cause other OBDII trouble codes besides P0351 in a 2005 Scion xB?

Yes, a bad ignition coil can cause other related trouble codes such as P0352, P0353, or P0354, which indicate issues with the primary or secondary circuit of different ignition coils in a 2005 Scion xB.