AutoCodes – Chevrolet – P0307 2015 Chevrolet Silverado

P0307 2015 Chevrolet Silverado Code - Cylinder 7 Misfire Detected

Quick Answer

A misfiring cylinder causes slight variations in the rotational speed of the crankshaft. Common causes include Faulty spark plug 7, Clogged or faulty fuel injector 7, Faulty ignition coil 7. 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: P0307 2015 Chevrolet Silverado indicates Cylinder 7 Misfire Detected.
Common causes: Common causes include Faulty spark plug 7, Clogged or faulty fuel injector 7, Faulty ignition coil 7.
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 1,892

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 09, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0307 2015 Chevrolet Silverado Description

A misfiring cylinder causes slight variations in the rotational speed of the crankshaft. The Engine Control Module (ECM) can detect these variations by closely monitoring the crankshaft position sensor signal. The signals of the camshaft position sensors are used to determine which cylinder is misfiring. If the ECM detects a misfire rate sufficient to cause emission levels to exceed mandated standards, the Diagnostic Trouble Code (DTC) will be set. Under certain driving conditions, a misfire rate can be high enough to cause the catalytic converter to overheat, damaging the converter. The Malfunction Indicator Lamp (MIL) flashes when the converter is overheating, damaging conditions are present, and the DTC is set. The DTC will be set when the ECM detects a crankshaft rotation speed variation indicating a single-cylinder misfire rate sufficient to cause emissions levels to exceed mandated standards.

OBDII Code P0307 2015 Chevrolet Silverado - Cylinder 7 Misfire Detected - AutoCodes.com — P0307 2015 Chevrolet Silverado Code - Cylinder 7 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0307 2015 Chevrolet Silverado?

Faulty spark plug 7
Clogged or faulty fuel injector 7
Faulty ignition coil 7
Fuel injector 7 harness is open or shorted
Fuel injector 7 circuit poor electrical connection
Ignition coil 7 harness is open or shorted
Ignition coil 7 circuit poor electrical connection
Insufficient cylinder 7 compression
Incorrect fuel pressure
Intake air leak

How to Fix the DTC P0307 2015 Chevrolet Silverado?

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 P0307 code means that cylinder 7 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 7. 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 P0307
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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0307 2015 Chevrolet Silverado 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 P0307 2015 Chevrolet Silverado code?

Need more information on how to fix the P0307 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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 P0307 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0307 on a 2015 Chevrolet Silverado?

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

2. What are the possible causes of a cylinder 7 misfire detected in a 2015 Chevrolet Silverado?

- Potential causes include faulty spark plugs, ignition coils, fuel injectors, vacuum leaks, low compression, or issues with the engine control module.

3. How can I diagnose the source of the cylinder 7 misfire in my 2015 Chevrolet Silverado?

- Diagnostic steps may include checking spark plugs, inspecting ignition coils, testing fuel injectors, conducting a compression test, and scanning for other related trouble codes.

4. Can driving with OBDII code P0307 in a 2015 Chevrolet Silverado cause further damage?

- Continuing to drive with a cylinder 7 misfire can potentially lead to damage to the catalytic converter, oxygen sensors, or other engine components over time.

5. How can I repair OBDII code P0307 on my 2015 Chevrolet Silverado?

- Repair options may involve replacing spark plugs, ignition coils, fuel injectors, addressing vacuum leaks, performing a compression test, or reprogramming the engine control module.

6. Are there any maintenance tips to prevent cylinder misfires in a 2015 Chevrolet Silverado?

- Regular maintenance, such as timely spark plug replacements, fuel system cleaning, and engine tune-ups, can help prevent cylinder misfires and related issues.

7. Is it safe to continue driving my 2015 Chevrolet Silverado with a cylinder 7 misfire detected?

- It is recommended to address the issue promptly to avoid potential damage to other engine components and ensure optimal vehicle performance.

8. Can weather conditions affect the likelihood of experiencing OBDII code P0307 in a 2015 Chevrolet Silverado?

- Extreme weather conditions, such as very cold temperatures affecting spark plug performance, can contribute to cylinder misfires and trigger code P0307.

9. How long does it typically take to repair OBDII code P0307 on a 2015 Chevrolet Silverado?

- The repair time can vary depending on the specific cause of the misfire, but it may take anywhere from a few hours to a full day for diagnosis and repair.

10. Should I reset the OBDII code P0307 after addressing the cylinder 7 misfire in my 2015 Chevrolet Silverado?

- It is recommended to clear the trouble code after repairing the issue to reset the Check Engine Light and monitor the vehicle's performance for any recurring problems.