AutoCodes – Toyota – P0306 2007 Toyota Camry

P0306 2007 Toyota Camry Code - Cylinder 6 Misfire Detected

Quick Answer

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Common causes include Faulty spark plug 6, Clogged or faulty fuel injector 6, Faulty ignition coil 6. 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: P0306 2007 Toyota Camry indicates Cylinder 6 Misfire Detected.
Common causes: Common causes include Faulty spark plug 6, Clogged or faulty fuel injector 6, Faulty ignition coil 6.
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 7,207

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 P0306 2007 Toyota Camry 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 as when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire rate exceeds the threshold level, and could cause emission deterioration, the ECM illuminates the MIL and sets a DTC.

OBDII Code P0306 2007 Toyota Camry - Cylinder 6 Misfire Detected - AutoCodes.com — P0306 2007 Toyota Camry Code - Cylinder 6 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0306 2007 Toyota Camry?

Faulty spark plug 6
Clogged or faulty fuel injector 6
Faulty ignition coil 6
Fuel injector 6 harness is open or shorted
Fuel injector 6 circuit poor electrical connection
Ignition coil 6 harness is open or shorted
Ignition coil 6 circuit poor electrical connection
Insufficient cylinder 6 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0306 2007 Toyota Camry?

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 P0306 code means that the cylinder 6 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 6. 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 P0306 2007 Toyota Camry 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 P0306 2007 Toyota Camry Code

1. What does the OBDII code P0306 mean on a 2007 Toyota Camry?

P0306 indicates a misfire detected specifically in cylinder 6 of the engine.

2. What are common symptoms of a P0306 code in a Toyota Camry?

Symptoms may include rough idling, reduced engine performance, hesitation during acceleration, and the Check Engine Light being illuminated.

3. What causes a P0306 code on a 2007 Toyota Camry?

Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low compression in cylinder 6, or vacuum leaks near that cylinder.

4. Can driving with a P0306 code damage my Toyota Camry?

Yes, prolonged driving with a misfire can lead to engine damage, such as overheating or damage to the catalytic converter.

5. How do I diagnose the cause of the P0306 code?

Start by inspecting the spark plug, ignition coil, and fuel injector for cylinder 6. Perform a compression test and check for vacuum leaks or wiring issues.

6. How much does it cost to fix a P0306 code on a 2007 Toyota Camry?

Repair costs can vary but typically range from $100 to $400 depending on whether you need to replace a spark plug, ignition coil, or fuel injector.

7. Can a dirty air filter cause a P0306 code?

While a dirty air filter can affect overall engine performance, it is unlikely to cause a specific cylinder misfire like P0306.

8. How do I reset the P0306 code after repairs?

You can reset the code using an OBDII scanner or by disconnecting the car battery for a few minutes. Ensure the issue is resolved before resetting.

9. Could bad fuel cause a P0306 code?

Yes, contaminated or poor-quality fuel can lead to misfires, including in cylinder 6, by affecting the fuel injector's performance.

10. Is replacing the ignition coil for cylinder 6 a DIY job?

Replacing an ignition coil can be a DIY task if you have basic tools and follow repair guides, but ensure you properly diagnose the issue before replacing parts.