Cylinder 1 Glow Plug Circuit
The POWERSTROKE-P0671 (Power Stroke) diesel fault code means: Cylinder 1 Glow Plug Circuit. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- beginner
- Estimated cost
- $50-$300
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 →What Are the Symptoms of POWERSTROKE-P0671?
- Hard cold start
- White smoke
- CEL
What Causes POWERSTROKE-P0671? (Most Likely First)
- Failed cylinder 1 glow plug Very Likely
- Broken wire to GP Likely
- Glow plug control module fault Possible
Can I Still Drive with POWERSTROKE-P0671?
Yes, but fix soon. POWERSTROKE-P0671 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.
Frequently Asked Questions
What is P0671 on a 6.7L Power Stroke (Scorpion)?
P0671 on a 6.7L Power Stroke (Scorpion) (2011-present) indicates: Cylinder 1 Glow Plug Circuit. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P0671 on my Power Stroke?
Yes, you can generally drive with this code, but diagnose it soon to prevent further damage.
How much does it cost to fix P0671?
Repair cost is typically $50-$300 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose POWERSTROKE-P0671?
Measure GP resistance -- 0.5-2 ohms healthy.
Inspect harness.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0671 as a generic OBD-II code)
P0671 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
Which Vehicles Commonly Get POWERSTROKE-P0671?
- 2011-present Ford F-250 Super Duty 6.7L Power Stroke
- 2011-present Ford F-350 Super Duty 6.7L Power Stroke
- 2011-present Ford F-450/F-550 Super Duty 6.7L Power Stroke
- 2015-2019 Ford F-650/F-750 6.7L Power Stroke
Explore More
Was this helpful?
Send this to whoever is fixing the truck — your tech, or the person asking what the fault means.