Cylinder 7 Misfire Detected
The POWERSTROKE-P0307 (Power Stroke) diesel fault code means: Cylinder 7 Misfire Detected. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- advanced
Down with a Power Stroke fault on the road?
We are building a network of verified mobile diesel and reefer technicians along the freight corridor. It is not live yet — no one can be dispatched to you today. You can see where the pilot is launching and register interest.
View pilot availability →A $30 car code reader can't do diesel. The HD7000 reads full-system codes and does parked DPF regen, idle/speed-limit, and service resets from the cab — on everything from a 6.7 Cummins/Power Stroke/Duramax pickup to Class-8 trucks (Detroit, Paccar, CAT, Volvo, Mack, International).
Full-system 6/9/16-pin diesel scan tool for Cummins, Paccar, CAT, Detroit and more — plug-and-play, no subscription. A cheaper way to read heavy-duty codes a basic OBD2 scanner skips entirely.
Affiliate links — we earn a commission at no extra cost to you.
What Are the Symptoms of POWERSTROKE-P0307?
- Check Engine Light on, possibly flashing
- Rough running
- Loss of power
- Possible smoke from the exhaust
What Causes POWERSTROKE-P0307? (Most Likely First)
- Cylinder 7 injector fault High
- Injector wiring or connector fault Moderate
- Low compression on cylinder 7 Moderate
- Fuel supply or quality problem Low
Can I Still Drive with POWERSTROKE-P0307?
Short distances only. POWERSTROKE-P0307 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0307 mean on a Power Stroke?
P0307 means Cylinder 7 Misfire Detected. The engine computer has detected that cylinder 7 is misfiring.
Is P0307 a Power Stroke-specific code?
No. P0307 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions Ford uses to set it on its diesels are in Ford service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose POWERSTROKE-P0307?
Check injector balance or contribution data on a scan tool.
Inspect the cylinder 7 injector wiring and connector.
Run a compression test before replacing the injector.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0307 as a generic OBD-II code)
P0307 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Explore More
Was this helpful?
Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.