POWERSTROKE-P20FB serious Power Stroke ›

SCR Feed Throughput Performance

The POWERSTROKE-P20FB (Power Stroke) diesel fault code means: SCR Feed Throughput Performance. This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
intermediate
Estimated cost
$300-$1,500
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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

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.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Monitor DEF pressure PID and commanded dosing rate.

  2. Replace DEF injector if clogged.

  3. Test DEF pump output pressure.

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J2012Diagnostic Trouble Code Definitions (defines P20FB as a generic OBD-II code)

Commonly Affected Vehicles

  • 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

Related Codes

P20EEP204F

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More Power Stroke codes → Diesel home All diesel codes Heavy-duty Guides

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