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P0303 2016 Chevrolet Silverado Code - Cylinder 3 Misfire Detected

Quick Answer

When a P0303 diagnostic trouble code (DTC) is triggered in a 2016 Chevrolet Silverado, it indicates that a misfire has been detected in cylinder 3 of the engine. Common causes include Faulty spark plug in cylinder 3, Failing ignition coil in cylinder 3, Clogged fuel injector affecting cylinder 3. 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 2016 Chevrolet Silverado indicates Cylinder 3 Misfire Detected.
Common causes
Common causes include Faulty spark plug in cylinder 3, Failing ignition coil in cylinder 3, Clogged fuel injector affecting cylinder 3.
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 2016 Chevrolet Silverado Description

When a P0303 diagnostic trouble code (DTC) is triggered in a 2016 Chevrolet Silverado, it indicates that a misfire has been detected in cylinder 3 of the engine. A misfire occurs when the fuel-air mixture in the cylinder fails to ignite properly, leading to a disruption in the combustion process. This can result in a loss of power, rough idling, decreased fuel efficiency, and potentially even engine damage if left unresolved.

OBDII Code P0303 2016 Chevrolet Silverado - Cylinder 3 Misfire Detected
P0303 2016 Chevrolet Silverado Code - Cylinder 3 Misfire Detected

Common Causes of P0303 2016 Chevrolet Silverado

  1. Faulty spark plug in cylinder 3.
  2. Failing ignition coil in cylinder 3.
  3. Clogged fuel injector affecting cylinder 3.
  4. Vacuum leak near cylinder 3.
  5. Low fuel pressure in the fuel system supplying cylinder 3.

Symptoms of P0303 2016 Chevrolet Silverado

  1. Rough idling or vibrations felt throughout the vehicle.
  2. Loss of power or acceleration, especially when accelerating from a stop.
  3. Engine misfires or hesitation during acceleration.
  4. Increased fuel consumption or decreased fuel efficiency.
  5. Illumination of the check engine light on the dashboard.

How to Fix P0303 2016 Chevrolet Silverado

  1. Begin by diagnosing the specific cause of the misfire in cylinder 3 using a scan tool to pinpoint the exact issue.
  2. Inspect and replace the spark plug in cylinder 3 if it is found to be faulty.
  3. Test the ignition coil in cylinder 3 and replace it if necessary.
  4. Clean or replace the fuel injector for cylinder 3 to ensure proper fuel delivery.
  5. Check for vacuum leaks near cylinder 3 and repair as needed to prevent further misfires.

Cost to Fix P0303 2016 Chevrolet Silverado

The typical repair costs for addressing a cylinder 3 misfire in a 2016 Chevrolet Silverado can range from $100 to $500, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes both parts and labor, with labor rates varying between $80 and $150 per hour at most auto repair shops. It's recommended to consult with a local mechanic or dealership for a more accurate cost estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0303 2016 Chevrolet Silverado

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".



There is a Factory Service Bulletins for All 2000-2020 Chevrolet Models:

2000-2020 Chevrolet Factory Service Bulletin OBDII Code P0303

This Factory Service Bulletin explains how this condition may be caused by significant carbon build-up on the intake and/or exhaust valves due to fuel contamination or incomplete burning of the fuel.

Need more information about the P0303 2016 Chevrolet Silverado code?

Need more information on how to fix the P0303 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0303 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2016 Chevrolet Silverado Code

1. What does the OBDII code P0303 mean on a 2016 Chevrolet Silverado?

P0303 indicates that the engine control module (ECM) has detected a misfire in cylinder 3 of your Silverado.

2. What are the common symptoms of a P0303 code on a 2016 Chevy Silverado?

Symptoms may include rough idling, reduced engine performance, poor fuel economy, illuminated check engine light, and possible engine shaking or hesitation.

3. What causes the P0303 code to appear on a 2016 Chevrolet Silverado?

Common causes include a faulty spark plug, bad ignition coil, clogged fuel injector, vacuum leak, low compression in cylinder 3, or an issue with the ECM.

4. Can I drive my 2016 Silverado with a P0303 code?

Driving with this code is not recommended, as it can lead to further engine damage, reduced performance, and potential safety issues.

5. How can I fix the P0303 code on my 2016 Chevy Silverado?

Start by inspecting and replacing the spark plug and ignition coil for cylinder 3. If the issue persists, check for a clogged fuel injector, vacuum leaks, or perform a compression test.

6. How much does it cost to repair a P0303 code on a 2016 Silverado?

Costs vary depending on the issue. Replacing a spark plug or ignition coil may cost $100–$300, while fixing fuel injector or compression issues can be more expensive.

7. Can a dirty air filter cause a P0303 code on a 2016 Chevy Silverado?

A dirty air filter alone is unlikely to cause a P0303 code, but it can contribute to overall engine performance issues that might exacerbate a misfire.

8. Will a bad fuel injector trigger a P0303 code on a 2016 Silverado?

Yes, a faulty or clogged fuel injector can cause improper fuel delivery to cylinder 3, leading to a misfire and triggering the P0303 code.

9. How do I diagnose a P0303 code on a 2016 Chevrolet Silverado?

Use an OBDII scanner to confirm the code, then inspect the spark plug, ignition coil, and fuel injector for cylinder 3. Check for vacuum leaks or perform a compression test if needed.

10. Can low fuel pressure cause the P0303 code on a 2016 Silverado?

Yes, low fuel pressure can cause insufficient fuel delivery to cylinder 3, which may result in a misfire and trigger the P0303 code.

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