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AutoCodes – Toyota – P0301 2011 Toyota Camry

P0301 2011 Toyota Camry Code - Cylinder 1 Misfire Detected

Quick Answer

When the engine misfires, high concentrations of hydrocarbons (HC) enter the exhaust gas. Common causes include Faulty Spark Plug #1, Clogged or faulty Fuel Injector #1, Faulty Ignition Coil #1. 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
P0301 2011 Toyota Camry indicates Cylinder 1 Misfire Detected.
Common causes
Common causes include Faulty Spark Plug #1, Clogged or faulty Fuel Injector #1, Faulty Ignition Coil #1.
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 10,652
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0301 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 P0301 2011 Toyota Camry - Cylinder 1 Misfire Detected - AutoCodes.com
P0301 2011 Toyota Camry Code - Cylinder 1 Misfire Detected
What does this mean?

What are the Possible Causes of the DTC P0301 2011 Toyota Camry?

  • Faulty Spark Plug #1
  • Clogged or faulty Fuel Injector #1
  • Faulty Ignition Coil #1
  • Fuel Injector #1 harness is open or shorted
  • Fuel Injector #1 circuit poor electrical connection
  • Ignition Coil #1 harness is open or shorted
  • Ignition Coil #1 circuit poor electrical connection
  • Insufficient cylinder 1 compression
  • Incorrect fuel pressure
  • Intake air leak

How to Fix the DTC P0301 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 P0301 code means that the cylinder 1 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 1. 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 P0301 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.

Need more information about the P0301 2011 Toyota Camry code?

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Need Help with the Code?

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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 P0301 2011 Toyota Camry Code

1. What does OBDII code P0301 mean for a 2011 Toyota Camry?

This code indicates a misfire in cylinder 1 of the engine.

2. What are common symptoms of a cylinder 1 misfire in a 2011 Toyota Camry?

Common symptoms include rough idle, loss of power, engine vibrations, and potentially increased fuel consumption.

3. What are some possible causes of a cylinder 1 misfire in a 2011 Toyota Camry?

Causes can include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, or issues with the engine's compression.

4. How can I diagnose the cause of a cylinder 1 misfire in my 2011 Toyota Camry?

Diagnostic steps may involve checking spark plugs, inspecting ignition coils, testing fuel injectors, and performing a compression test on cylinder 1.

5. Can driving with a cylinder 1 misfire in a 2011 Toyota Camry cause further damage?

Continued driving with a misfire can potentially cause damage to the catalytic converter, so it's recommended to address the issue promptly.

6. How can I repair a cylinder 1 misfire in my 2011 Toyota Camry?

Repairs may involve replacing spark plugs, ignition coils, fuel injectors, or addressing any underlying issues like vacuum leaks or compression problems.

7. Is it safe to drive my 2011 Toyota Camry with a cylinder 1 misfire?

It's generally not recommended to drive with a misfire as it can lead to other issues and potentially compromise the vehicle's performance and efficiency.

8. How much does it typically cost to repair a cylinder 1 misfire in a 2011 Toyota Camry?

The cost of repairs can vary based on the specific cause of the misfire, but it's advisable to consult with a mechanic for an accurate estimate.

9. Can a cylinder 1 misfire in a 2011 Toyota Camry be fixed without professional help?

While some simple fixes like changing spark plugs can be done at home, diagnosing and repairing more complex issues may require professional expertise.

10. How often should I check for cylinder misfires in my 2011 Toyota Camry?

Regular maintenance, including periodic spark plug replacements and tune-ups, can help prevent cylinder misfires and other engine issues.

Discuss the causes and fixes for P0301 2011 Toyota Camry OBDII Code

Submit a New Comment

  • Hello. 11 camry #1 misfire code p0301. Has new plugs, new coils, head gasket replaced. Still the check engine light and traction control light comes on. Tested Compression all over 200 please help!!

    Reply to Comment

  • Is the engine running rough or is just the engine light? The next step is probably the fuel injector, there is nothing else left to do.

    Reply to Comment
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