SCR Feed Throughput Performance
Can I Drive?
Short Distances Only
DIY Difficulty
intermediate
Estimated Cost
$300-$1,500
What does POWERSTROKE-P20FB mean?
The POWERSTROKE-P20FB (Power Stroke) diesel fault code means: SCR Feed Throughput Performance. This is a serious severity code.
Common Symptoms
- CEL
- Derate
- Reduced DEF flow
Probable Causes (Ranked by Likelihood)
- Clogged DEF injector Very Likely
- Failed DEF pump pressure regulator Likely
- Low DEF supply pressure Possible
Step-by-Step Diagnostic Procedure
Monitor DEF pressure PID and commanded dosing rate.
Replace DEF injector if clogged.
Test DEF pump output pressure.
Frequently Asked Questions
What is P20FB on a 6.7L Power Stroke (Scorpion)?
P20FB on a 6.7L Power Stroke (Scorpion) (2011-present) indicates: SCR Feed Throughput Performance. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P20FB 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 P20FB?
Repair cost is typically $300-$1,500 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.