AutoCodes – Toyota – P0306 2011 Toyota Camry

P0306 2011 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 2011 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 4,460

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 2011 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 2011 Toyota Camry - Cylinder 6 Misfire Detected - AutoCodes.com — P0306 2011 Toyota Camry Code - Cylinder 6 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0306 2011 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 2011 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 2011 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 2011 Toyota Camry Code

1. What does OBDII code P0306 mean for a 2011 Toyota Camry?

P0306 indicates that the engine control module (ECM) has detected a misfire in cylinder 6 of your Toyota Camry.

2. What are the common symptoms of a P0306 code in a 2011 Toyota Camry?

Symptoms include rough idling, reduced engine performance, poor fuel economy, engine hesitation, and possibly an illuminated check engine light.

3. What causes a P0306 code in a 2011 Toyota Camry?

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

4. Can I drive my 2011 Toyota Camry with a P0306 code?

Driving with a P0306 code is not recommended as it may cause further engine damage or catalytic converter failure if the misfire persists.

5. How can I diagnose the P0306 code in my 2011 Toyota Camry?

Start by checking the spark plug, ignition coil, and fuel injector for cylinder 6. You can also perform a compression test and inspect for vacuum leaks.

6. How do I fix the P0306 code on a 2011 Toyota Camry?

Repairs may include replacing the spark plug or ignition coil for cylinder 6, cleaning or replacing the fuel injector, fixing vacuum leaks, or addressing engine compression issues.

7. How much does it cost to fix a P0306 code on a 2011 Toyota Camry?

Repair costs can range from $100 to $300 for simple fixes like replacing a spark plug or ignition coil, but more extensive repairs, like addressing low compression, can cost significantly more.

8. Could a bad ignition coil cause a P0306 code on a 2011 Toyota Camry?

Yes, a faulty ignition coil for cylinder 6 is a common cause of a P0306 code and should be inspected and replaced if necessary.

9. How do I prevent a P0306 code in my 2011 Toyota Camry?

Regular maintenance, such as replacing spark plugs and ignition coils at recommended intervals and using high-quality fuel, can help prevent misfires.

10. Will clearing the P0306 code with a scan tool fix the problem in a 2011 Toyota Camry?

Clearing the code will turn off the check engine light temporarily, but it wonâ€™t fix the underlying issue causing the misfire. Proper diagnosis and repair are necessary.