Injector Circuit/Open - Cylinder 7
The DURAMAX-P0207 (Duramax) diesel fault code means: Injector Circuit/Open - Cylinder 7. This is a serious severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- intermediate
Down with a Duramax 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 DURAMAX-P0207?
- Check Engine Light on
- Rough running or misfire
- Smoke from the exhaust
- Reduced power
What Causes DURAMAX-P0207? (Most Likely First)
- Open or damaged wiring to the cylinder 7 injector High
- Failed injector coil High
- Corroded or loose injector connector Moderate
- Injector driver fault in the control module Low
Can I Still Drive with DURAMAX-P0207?
Yes, with caution. DURAMAX-P0207 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0207 mean on a Duramax?
P0207 means Injector Circuit/Open - Cylinder 7. The engine computer has detected an open or faulty electrical circuit for the cylinder 7 injector.
Is P0207 a Duramax-specific code?
No. P0207 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 GM uses to set it on its diesels are in GM service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose DURAMAX-P0207?
Check the cylinder 7 injector harness and connector for damage and corrosion.
Measure the injector coil resistance and compare it with the specification.
Check the circuit for continuity back to the control module.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0207 as a generic OBD-II code)
P0207 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.