POWERSTROKE-P20F7 serious Power Stroke ›

SCR Temperature Too Low

The POWERSTROKE-P20F7 (Power Stroke) diesel fault code means: SCR Temperature Too Low. This is a serious severity code.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$0-$500
Mobile mechanic network · I-5 corridor pilot

Down with a Power Stroke fault on the road?

Get connected with a verified mobile diesel mechanic near you. Verified diesel & reefer techs, launching on the freight corridor.

Find a mobile mechanic →
Built for Diesel — Not a Car Reader
ANCEL HD7000 Heavy-Duty Diesel Scanner

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).

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Lower-Cost Diesel Option
FOXWELL HD301 Diesel Truck Scanner

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.

Check Price on Amazon

Affiliate link -- we earn a commission at no extra cost to you.

Common Symptoms

  • CEL

Probable Causes (Ranked by Likelihood)

  • Short-trip driving Likely
  • Failed SCR temp sensor Likely

Step-by-Step Diagnostic Procedure

  1. Highway drive.

  2. Replace sensor if needed.

Frequently Asked Questions

What is P20F7 on a 6.7L Power Stroke (Scorpion)?

P20F7 on a 6.7L Power Stroke (Scorpion) (2011-present) indicates: SCR Temperature Too Low. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.

Can I drive with P20F7 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 P20F7?

Repair cost is typically $0-$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.

Explore More