Engine-Codes.com
Engine-Codes – Scion – P0303 2007 Scion xB

P0303 2007 Scion xB Code - Cylinder 3 Misfire Detected

Quick Answer

When the OBD-II system in a 2007 Scion xB detects a misfire in cylinder 3, it triggers the diagnostic trouble code P0303. Common causes include Faulty spark plug in cylinder 3, Failing ignition coil in cylinder 3, Clogged fuel injector for cylinder 3. 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
P0303 2007 Scion xB indicates Cylinder 3 Misfire Detected.
Common causes
Common causes include Faulty spark plug in cylinder 3, Failing ignition coil in cylinder 3, Clogged fuel injector for cylinder 3.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0303 2007 Scion xB Description

When the OBD-II system in a 2007 Scion xB detects a misfire in cylinder 3, it triggers the diagnostic trouble code P0303. This code indicates that the engine's computer has detected that cylinder 3 is not firing properly, leading to a misfire. A misfire occurs when the air-fuel mixture in the cylinder does not ignite at the right time or does not ignite at all. This can result in a lack of power, rough idling, poor fuel economy, and increased emissions.

OBDII Code P0303 2007 Scion xB - Cylinder 3 Misfire Detected
P0303 2007 Scion xB Code - Cylinder 3 Misfire Detected

Common Causes of P0303 2007 Scion xB

  1. Faulty spark plug in cylinder 3
  2. Failing ignition coil in cylinder 3
  3. Clogged fuel injector for cylinder 3
  4. Low compression in cylinder 3
  5. Vacuum leak affecting cylinder 3

Symptoms of P0303 2007 Scion xB

  1. Rough idling
  2. Loss of power
  3. Engine vibration
  4. Increased fuel consumption
  5. Check Engine Light illuminated

How to Fix P0303 2007 Scion xB

  1. Diagnose the specific cause of the misfire in cylinder 3 using a scan tool to pinpoint the issue.
  2. Inspect and replace the spark plug in cylinder 3 if it is found to be faulty.
  3. Test and replace the ignition coil for cylinder 3 if necessary.
  4. Clean or replace the fuel injector for cylinder 3 to ensure proper fuel delivery.
  5. Perform a compression test on cylinder 3 to check for any mechanical issues causing the misfire.

Cost to Fix P0303 2007 Scion xB

The cost of repairing a cylinder 3 misfire in a 2007 Scion xB can vary depending on the specific cause of the issue. On average, the cost of replacing a spark plug can range from $50 to $150, while replacing an ignition coil can cost between $150 and $300. Cleaning or replacing a fuel injector may cost around $100 to $300. A compression test typically costs between $100 and $200. Overall, the total repair cost for a cylinder 3 misfire can range from $300 to $750, including parts and labor. It is important to note that labor rates at auto repair shops can vary, so it is recommended to obtain quotes from multiple shops to ensure a competitive price.

What does this mean?

Tech Notes for P0303 2007 Scion xB

The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 3. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

When is the Code Detected?

Engine Cylinder 3 is Misfiring.

Need more information about the P0303 2007 Scion xB code?

Need more information on how to fix the P0303 2007 Scion xB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0303 2007 Scion xB 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 P0303 2007 Scion xB Code

1. What are the common symptoms of OBDII code P0303 (Cylinder 3 Misfire Detected) on a 2007 Scion xB?

- Common symptoms include rough idling, loss of power, engine vibration, and potentially an illuminated check engine light.

2. What are the possible causes of a cylinder 3 misfire in a 2007 Scion xB?

- Potential causes can include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression, or issues with the engine's computer.

3. How can I diagnose the source of the cylinder 3 misfire on my 2007 Scion xB?

- Diagnostic steps may include checking spark plugs, ignition coils, fuel injectors, compression levels, vacuum leaks, and using a code reader to pinpoint the exact cause.

4. What are some repair tips for fixing a cylinder 3 misfire on a 2007 Scion xB?

- Repair tips may involve replacing spark plugs, ignition coils, fuel injectors, addressing vacuum leaks, performing a compression test, or updating the engine's software.

5. Can driving with a cylinder 3 misfire damage my 2007 Scion xB?

- Continuing to drive with a misfire can potentially cause damage to the catalytic converter, oxygen sensors, or other engine components, so it's best to address the issue promptly.

6. How much does it typically cost to repair a cylinder 3 misfire on a 2007 Scion xB?

- The cost of repair can vary depending on the specific cause of the misfire, but it may range from a few hundred dollars for simple fixes to over a thousand dollars for more complex issues.

7. Is it safe to continue driving my 2007 Scion xB with a cylinder 3 misfire?

- It is not recommended to drive with a misfire as it can lead to further damage and potentially compromise the vehicle's performance and fuel efficiency.

8. Can a cylinder 3 misfire be a recurring problem in a 2007 Scion xB?

- If the root cause of the misfire is not properly addressed, it can become a recurring issue, so it's important to diagnose and fix the problem thoroughly.

9. How long does it typically take to repair a cylinder 3 misfire on a 2007 Scion xB?

- The repair time can vary depending on the specific cause of the misfire and the availability of parts, but it may take a few hours to a full day to diagnose and fix the issue.

10. Will resetting the check engine light resolve the cylinder 3 misfire in my 2007 Scion xB?

- Simply resetting the check engine light will not fix the underlying issue causing the misfire, so it's essential to diagnose and repair the problem to prevent it from reoccurring.

Discuss the causes and fixes for P0303 2007 Scion xB OBDII Code

Submit a New Comment

Code P0303 2007 Scion xB comments

No comments found for this page.