P0307 Buick Code - Cylinder 7 Misfire Detected
Quick Answer
When a Buick vehicle displays the diagnostic trouble code P0307, it indicates that a misfire has been detected in cylinder 7 of the engine. Common causes include Faulty spark plugs, Failing ignition coil, Clogged fuel injector. 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 Buick indicates Cylinder 7 Misfire Detected.
- Common causes
- Common causes include Faulty spark plugs, Failing ignition coil, Clogged fuel injector.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0307 Buick Description
When a Buick vehicle displays the diagnostic trouble code P0307, it indicates that a misfire has been detected in cylinder 7 of the engine. This means that the fuel-air mixture in the combustion chamber of that particular cylinder is not igniting properly, leading to a disruption in the engine's smooth operation. A misfire can cause a range of issues, including reduced engine performance, decreased fuel efficiency, increased emissions, and potential damage to other engine components over time.
Common Causes of P0307 Buick
- Faulty spark plugs
- Failing ignition coil
- Clogged fuel injector
- Vacuum leaks
- Low compression in cylinder 7
Symptoms of P0307 Buick
- Rough running engine
- Loss of power
- Increased fuel consumption
- Engine vibrations
- Illuminated check engine light
How to Fix P0307 Buick
- Diagnose the exact cause of the misfire with a scan tool and engine diagnostics.
- Inspect and replace spark plugs if worn out or damaged.
- Test and replace the ignition coil if faulty.
- Clean or replace the fuel injector for cylinder 7.
- Check for vacuum leaks and repair as needed.
Cost to Fix P0307 Buick
The cost of repairing a cylinder 7 misfire in a Buick can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor in your area. Keep in mind that these are rough estimates, and actual costs can vary based on the extent of the damage and the rates charged by auto repair shops in your location. It's recommended to get multiple quotes from different shops to find the best price for the repair.
Tech Notes for P0307 Buick
There is a Factory Service Bulletins for All 2000-2020 Buick Models:
2000-2020 Buick 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.
Need more information about the P0307 Buick code?
Need more information on how to fix the P0307 Buick code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0307 Buick code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0307 Buick Code
No Frequently Asked Questions about P0307 Buick Code found.
Discuss the causes and fixes for P0307 Buick OBDII Code
Code P0307 Buick comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.