AutoCodes – Toyota – P0305 2010 Toyota Camry

P0305 2010 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 2010 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 5,080

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 2010 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 2010 Toyota Camry - Cylinder 5 Misfire Detected - AutoCodes.com — P0305 2010 Toyota Camry Code - Cylinder 5 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0305 2010 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 2010 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 2010 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 2010 Toyota Camry Code

1. What does the OBDII code P0305 mean on a 2010 Toyota Camry?

P0305 indicates a misfire has been detected in cylinder 5, which means the engine isnâ€™t firing properly in that specific cylinder.

2. What are the common symptoms of a P0305 code in a 2010 Toyota Camry?

Symptoms may include rough idling, reduced power, poor fuel economy, engine hesitation, and the Check Engine Light being illuminated.

3. What causes a P0305 code on a 2010 Toyota Camry?

Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low cylinder compression, or a vacuum leak near cylinder 5.

4. Can I drive my 2010 Toyota Camry with a P0305 code?

Driving with a P0305 code is not recommended as it can cause further engine damage, reduce performance, and increase emissions.

5. How do I diagnose a P0305 code on my 2010 Toyota Camry?

Start by inspecting the spark plug, ignition coil, and fuel injector for cylinder 5. You can also check for vacuum leaks, perform a compression test, and scan for related codes.

6. How do I fix a P0305 code on a 2010 Toyota Camry?

Repairs may include replacing the spark plug, ignition coil, or fuel injector for cylinder 5, repairing vacuum leaks, or addressing low compression if present.

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

While itâ€™s unlikely, a severely clogged air filter could restrict airflow and contribute to engine misfires, but itâ€™s not a primary cause of a P0305 code.

8. Does a P0305 code mean I need to replace the ignition coil?

Not necessarily. The ignition coil for cylinder 5 could be the issue, but itâ€™s important to test it first before replacing it.

9. How much does it cost to repair a P0305 code on a 2010 Toyota Camry?

The cost varies, but replacing a spark plug or ignition coil typically ranges from $100 to $300, while more extensive repairs like fixing low compression may cost more.

10. Can bad fuel cause a P0305 code in a 2010 Toyota Camry?

Yes, bad or contaminated fuel can cause misfires, including in cylinder 5. Draining the fuel and refilling with quality gasoline may resolve the issue.