P0307 Chevrolet 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 Chevrolet 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.
Code P0307 Chevrolet Description
What are the Possible Causes of the DTC P0307 Chevrolet?
- 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 Chevrolet?
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.
Code Tech Notes
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.
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0307 Chevrolet 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.
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Information for Specific Chevrolet Models
- P0307 2014 Chevrolet Silverado — Cylinder 7 Misfire Detected
- P0307 2015 Chevrolet Silverado — Cylinder 7 Misfire Detected
- P0307 2016 Chevrolet Silverado — Cylinder 7 Misfire Detected
- P0307 2017 Chevrolet Silverado — Cylinder 7 Misfire Detected
- P0307 2018 Chevrolet Silverado — Cylinder 7 Misfire Detected
Frequently Asked Questions about P0307 Chevrolet Code
1. What are common symptoms of OBDII code P0307 (Cylinder 7 Misfire Detected) in a Chevrolet?
Symptoms may include rough idling, loss of power, engine vibration, poor fuel economy, and potentially an illuminated check engine light.
2. What are some possible causes of a cylinder 7 misfire in a Chevrolet triggering OBDII code P0307?
Common causes include faulty ignition coil, spark plug, fuel injector, vacuum leak, low compression, or issues with the engine's computer system.
3. How can I diagnose the source of the misfire in cylinder 7 of my Chevrolet triggering code P0307?
You can start by checking the spark plug, ignition coil, fuel injector, compression in cylinder 7, and inspecting for vacuum leaks. Using a diagnostic tool to monitor live data can also help pinpoint the issue.
4. Can a dirty or clogged fuel injector cause a misfire in cylinder 7 of a Chevrolet triggering code P0307?
Yes, a dirty or clogged fuel injector can disrupt the air-fuel mixture going into the cylinder, leading to a misfire and triggering the OBDII code P0307.
5. Is it safe to drive my Chevrolet with OBDII code P0307 (Cylinder 7 Misfire Detected) triggered?
It is not recommended to drive your vehicle with a misfire as it can cause damage to the catalytic converter and other engine components. It's advisable to address the issue promptly.
6. How can I repair a cylinder 7 misfire in my Chevrolet causing OBDII code P0307?
Repair options may include replacing the spark plug, ignition coil, fuel injector, fixing vacuum leaks, performing a compression test, or seeking professional help to diagnose and fix the issue.
7. Does weather or temperature affect the likelihood of a cylinder 7 misfire in a Chevrolet triggering code P0307?
Extreme weather or temperature conditions can sometimes exacerbate existing issues that may lead to a cylinder misfire, so it's important to address any underlying problems promptly.
8. Can a faulty ECM (Engine Control Module) cause a misfire in cylinder 7 of a Chevrolet triggering code P0307?
Yes, a faulty ECM can potentially cause misfires by not sending the correct signals to the ignition system or fuel injectors, leading to a cylinder misfire and triggering the OBDII code P0307.
9. How much does it typically cost to repair a cylinder 7 misfire in a Chevrolet causing OBDII code P0307?
The cost of repair can vary depending on the exact cause of the misfire and the specific parts that need to be replaced. It's advisable to get a diagnostic assessment from a mechanic for an accurate estimate.
10. Can neglecting a cylinder 7 misfire in a Chevrolet triggering OBDII code P0307 lead to more severe engine damage?
Continued driving with a misfire can lead to increased fuel consumption, damage to the catalytic converter, and potentially more severe engine issues over time. It's essential to address misfires promptly to prevent further damage.
Discuss the causes and fixes for P0307 Chevrolet OBDII Code
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What model and year is your Chevrolet? You may have a problem with the EGR valve. Lack or excessive EGR gases could cause the P0307 code. Try fixing the P0401 and P0406 first.
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have a 2005 chev silverdo saying mis fire on #7 change coil.plug and wire still have promblem
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2008 cylinder 7 misfire, changed coil and plug, still on... also service stabilitrak light is on
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We have 07 Chevy 6.0 doing same thing how did u fix your we changed plugs wires coil and fuel injector still same thing
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did you ever find the source of your problem? my 2012 is doing the exact same thing
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