AutoCodes – Toyota – P0305 2011 Toyota Camry

P0305 2011 Toyota Camry Code - Cylinder 5 Misfire Detected

Quick Answer

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Common causes include Faulty spark plug 5, Clogged or faulty fuel injector 5, Faulty ignition coil 5. 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: P0305 2011 Toyota Camry indicates Cylinder 5 Misfire Detected.
Common causes: Common causes include Faulty spark plug 5, Clogged or faulty fuel injector 5, Faulty ignition coil 5.
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 3,605

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 P0305 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 P0305 2011 Toyota Camry - Cylinder 5 Misfire Detected - AutoCodes.com — P0305 2011 Toyota Camry Code - Cylinder 5 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0305 2011 Toyota Camry?

Faulty spark plug 5
Clogged or faulty fuel injector 5
Faulty ignition coil 5
Fuel injector 5 harness is open or shorted
Fuel injector 5 circuit poor electrical connection
Ignition coil 5 harness is open or shorted
Ignition coil 5 circuit poor electrical connection
Insufficient cylinder 5 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0305 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 P0305 code means that the cylinder 5 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 5. 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 P0305 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 P0305 2011 Toyota Camry Code

1. What does the OBDII code P0305 mean on a 2011 Toyota Camry?

P0305 indicates a misfire has been detected in cylinder 5, meaning the engine is not firing properly in that cylinder.

2. What are the symptoms of a P0305 code in a 2011 Toyota Camry?

Common symptoms include rough idling, reduced engine power, poor fuel efficiency, hesitation during acceleration, and the check engine light turning on.

3. What are the common causes of a P0305 code?

The main causes can include a faulty spark plug, a failing ignition coil, a clogged fuel injector, low cylinder compression, or a vacuum leak near cylinder 5.

4. Can I drive my 2011 Toyota Camry with a P0305 code?

Driving with a P0305 code is not recommended, as it can lead to further engine damage, higher emissions, and reduced fuel efficiency.

5. How do I diagnose the P0305 code on my Toyota Camry?

Diagnosis typically involves inspecting the spark plug and ignition coil for cylinder 5, checking the fuel injector, and performing a compression test to evaluate cylinder health.

6. How do I fix a P0305 code in my 2011 Toyota Camry?

Repairs may include replacing the spark plug or ignition coil for cylinder 5, cleaning or replacing the fuel injector, or addressing any vacuum leaks or compression issues.

7. How much does it cost to repair a P0305 code?

Costs vary depending on the issue but typically range from $100 to $300 for parts and labor, unless major engine repairs are needed.

8. Can a dirty air filter cause a P0305 code?

While unlikely, a severely clogged air filter can reduce air intake and contribute to misfires, so itâ€™s worth checking during diagnosis.

9. How can I prevent a P0305 code from occurring?

Regular maintenance, such as replacing spark plugs and ignition coils on schedule, using quality fuel, and keeping the fuel system clean, can help prevent misfires.

10. Will a P0305 code cause long-term damage to my engine?

If ignored, a P0305 code can lead to catalytic converter damage, increased wear on engine components, and reduced overall engine lifespan.