AutoCodes – Scion – P0302 2007 Scion xB

P0302 2007 Scion xB Code - Cylinder 2 Misfire Detected

Quick Answer

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Common causes include Faulty spark plug (s), Faulty ignition coil (s), Clogged or faulty fuel injector (s). 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: P0302 2007 Scion xB indicates Cylinder 2 Misfire Detected.
Common causes: Common causes include Faulty spark plug (s), Faulty ignition coil (s), Clogged or faulty fuel injector (s).
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 3,114

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0302 2007 Scion xB Description

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Extremely high HC concentration levels can cause increases in exhaust emission levels. High concentrations of HC can also cause increases in the Three-Way Catalytic Converter (TWC) temperature, which may cause damage to the TWC. To prevent these increases in emissions and to limit the possibility of thermal damage, the ECM monitors the misfire rate. When the temperature of the TWC reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the Camshaft Position (CMP) sensor and the Crankshaft Position (CKP) sensor. The CMP sensor is used to identify any misfiring cylinders and the CKP sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire exceeds the threshold levels, and could cause emission deterioration, the ECM illuminates the MIL and sets a DTC.

OBDII Code P0302 2007 Scion xB - Cylinder 2 Misfire Detected - AutoCodes.com — P0302 2007 Scion xB Code - Cylinder 2 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0302 2007 Scion xB?

Faulty spark plug (s)
Faulty ignition coil (s)
Clogged or faulty fuel injector (s)
Intake air leak
Fuel injectors harness is open or shorted
Fuel Injectors circuit poor electrical connection
Ignition coils harness is open or shorted
Ignition coils circuit poor electrical connection
Insufficient cylinders compression
Incorrect fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Valve clearance
Valve timing
ECM

How to Fix the DTC P0302 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 does this mean?

Code Tech Notes

The P0302 code means that the cylinder 2 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 2. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0302 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.

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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 P0302 2007 Scion xB Code

1. What are common symptoms of OBDII code P0302 on a 2007 Scion xB?

- Common symptoms include engine misfiring, rough idle, loss of power, and potential hesitation during acceleration.

2. What are the possible causes of a Cylinder 2 misfire detected in a 2007 Scion xB?

- Potential causes of a Cylinder 2 misfire can include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, or a problem with the engine's compression.

3. How can I diagnose the cause of a Cylinder 2 misfire in my 2007 Scion xB?

- To diagnose the issue, you can perform a visual inspection of spark plugs and ignition coils, use a scan tool to check for specific cylinder misfire codes, and conduct a compression test to assess the engine's health.

4. Can driving with a Cylinder 2 misfire on a 2007 Scion xB cause further damage?

- Continuing to drive with a misfire can potentially lead to damage to the catalytic converter, reduced fuel efficiency, and further engine issues, so it is best to address the problem promptly.

5. How can I repair a Cylinder 2 misfire in my 2007 Scion xB?

- Repair options may include replacing spark plugs, ignition coils, fuel injectors, fixing vacuum leaks, or addressing any compression issues in the engine.

6. Are there any DIY tips for fixing a Cylinder 2 misfire in a 2007 Scion xB?

- DIY enthusiasts can start by checking and replacing spark plugs, inspecting ignition coils for damage, cleaning or replacing fuel injectors, and ensuring there are no vacuum leaks in the system.

7. Is it necessary to reset the OBDII code after fixing a Cylinder 2 misfire in a 2007 Scion xB?

- Yes, it is recommended to reset the OBDII code after repairing the issue to clear the fault codes and see if the problem has been successfully resolved.

8. How much does it typically cost to repair a Cylinder 2 misfire on a 2007 Scion xB at a mechanic?

- The cost of repairing a Cylinder 2 misfire can vary depending on the exact cause and the mechanic's labor rates, but it may range from $100 to $500 or more.

9. Can a Cylinder 2 misfire on a 2007 Scion xB be caused by a bad fuel injector?

- Yes, a faulty fuel injector can cause a misfire in a specific cylinder, including Cylinder 2, by delivering an improper amount of fuel to the combustion chamber.

10. Is it safe to drive a 2007 Scion xB with a flashing check engine light indicating a Cylinder 2 misfire?

- A flashing check engine light indicates a severe misfire that can potentially cause damage to the catalytic converter. It is not recommended to drive the vehicle in this condition and should be addressed immediately.