Fuel Pressure Regulator Circuit Low
The POWERSTROKE-P0091 (Power Stroke) diesel fault code means: Fuel Pressure Regulator Circuit Low. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $200-$900
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Common Symptoms
- CEL
Probable Causes (Ranked by Likelihood)
- Short in PCV wiring Likely
Step-by-Step Diagnostic Procedure
Repair wiring.
Replace PCV.
Frequently Asked Questions
What is P0091 on a 6.7L Power Stroke (Scorpion)?
P0091 on a 6.7L Power Stroke (Scorpion) (2011-present) indicates: Fuel Pressure Regulator Circuit Low. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P0091 on my Power Stroke?
Only drive short distances to get to a repair facility. Continued operation may cause further damage.
How much does it cost to fix P0091?
Repair cost is typically $200-$900 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.
P0091 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: