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Engine-Codes – Honda – P0303 2019 Honda CR-V

P0303 2019 Honda CR-V Code - No. 3 Cylinder Misfire Detected

Quick Answer

When a diagnostic trouble code P0303 is triggered in a 2019 Honda CR-V, it indicates that a misfire has been detected in the No. Common causes include Worn or fouled spark plugs that are not providing a proper spark, Faulty ignition coil that is not delivering electricity to the spark plug, Clogged or malfunctioning fuel injector that is not delivering fuel to the cylinder. 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
P0303 2019 Honda CR-V indicates No. 3 Cylinder Misfire Detected.
Common causes
Common causes include Worn or fouled spark plugs that are not providing a proper spark, Faulty ignition coil that is not delivering electricity to the spark plug, Clogged or malfunctioning fuel injector that is not delivering fuel to the cylinder.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0303 2019 Honda CR-V Description

When a diagnostic trouble code P0303 is triggered in a 2019 Honda CR-V, it indicates that a misfire has been detected in the No. 3 cylinder of the engine. This means that the fuel-air mixture in that particular cylinder is not igniting properly, leading to a disruption in the combustion process. This can result in a variety of performance issues, including rough idling, decreased fuel efficiency, loss of power, and potentially even engine stalling.

OBDII Code P0303 2019 Honda CR-V - No. 3 Cylinder Misfire Detected
P0303 2019 Honda CR-V Code - No. 3 Cylinder Misfire Detected

Common Causes of P0303 2019 Honda CR-V

  1. Worn or fouled spark plugs that are not providing a proper spark.
  2. Faulty ignition coil that is not delivering electricity to the spark plug.
  3. Clogged or malfunctioning fuel injector that is not delivering fuel to the cylinder.
  4. Vacuum leaks in the intake manifold or vacuum hoses.
  5. Low compression in the No. 3 cylinder due to worn piston rings or cylinder head issues.

Symptoms of P0303 2019 Honda CR-V

  1. Rough idling or vibrations felt while the vehicle is at a standstill.
  2. Loss of power or hesitation during acceleration.
  3. Increased fuel consumption and decreased fuel efficiency.
  4. Engine misfires or stuttering while driving.
  5. Illumination of the check engine light on the dashboard.

How to Fix P0303 2019 Honda CR-V

  1. Begin by diagnosing the specific cause of the misfire by conducting a thorough inspection of the spark plugs, ignition coils, fuel injectors, and compression levels.
  2. Replace the spark plugs in all cylinders, as well as the ignition coil for the No. 3 cylinder.
  3. Clean or replace the fuel injector for the No. 3 cylinder if necessary.
  4. Check for and repair any vacuum leaks in the intake system.
  5. If low compression is detected in the No. 3 cylinder, further engine diagnostics and repairs may be required.

Cost to Fix P0303 2019 Honda CR-V

The cost of repairing a No. 3 cylinder misfire in a 2019 Honda CR-V can vary depending on the specific cause of the issue and the parts needed for repair. On average, the cost of replacing spark plugs, an ignition coil, and cleaning a fuel injector can range from $200 to $500 in parts and labor. However, if additional repairs are needed due to low compression or other engine issues, the cost could increase significantly. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate based on your specific situation. Keep in mind that labor rates can vary, so it's advisable to inquire about rates in your local area.

What does this mean?

Tech Notes for P0303 2019 Honda CR-V

The P0303 code means that cylinder #3 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 #3. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes".

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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 P0303 2019 Honda CR-V Code

1. What does OBDII code P0303 mean on a 2019 Honda CR-V?

P0303 indicates a misfire has been detected in cylinder No. 3 of the engine.

2. What are the common symptoms of a P0303 code on a 2019 Honda CR-V?

Symptoms may include rough idling, decreased engine performance, poor fuel economy, engine hesitation, or the Check Engine Light illuminating.

3. What causes a P0303 code on a 2019 Honda CR-V?

Possible causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low engine compression, or an air/fuel mixture issue.

4. Can I drive my 2019 Honda CR-V with a P0303 code?

While the vehicle may still be drivable, continuing to drive with a misfire can cause engine damage or damage to the catalytic converter.

5. How do I diagnose a P0303 code on a 2019 Honda CR-V?

Start by inspecting the spark plug and ignition coil for cylinder No. 3, checking for vacuum leaks, testing the fuel injector, and performing a compression test if necessary.

6. How do I fix a P0303 code on a 2019 Honda CR-V?

Common fixes include replacing the spark plug, ignition coil, or fuel injector for cylinder No. 3, repairing vacuum leaks, or addressing low compression if present.

7. How much does it cost to repair a P0303 code on a 2019 Honda CR-V?

Repair costs vary depending on the issue, ranging from $100–$300 for a spark plug or ignition coil replacement to higher costs if more advanced repairs like compression issues are involved.

8. Can a dirty air filter cause a P0303 code on a 2019 Honda CR-V?

While unlikely, a severely clogged air filter can contribute to poor air/fuel mixture, which might exacerbate misfires.

9. Will clearing the code with an OBDII scanner fix the P0303 issue?

Clearing the code will turn off the Check Engine Light temporarily, but it will not resolve the underlying problem causing the misfire.

10. How often should I replace spark plugs to avoid a P0303 code on a 2019 Honda CR-V?

Honda recommends replacing spark plugs every 100,000 miles under normal driving conditions to maintain engine performance and prevent misfires.

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