Ford 6.7L Power Stroke Diesel :: Exhaust Fluid Fault With P20EE AND P2080


Apr 7, 2014

Set out for a 450 mile trip this morning. Checked all fluids, then checked the Edge CTS for any DTC's since it had been several weeks since I had driven the truck more than 100 miles per day. No codes except for a couple of P0000's.

Good to go.

45 miles into the trip while traveling at 75 MPH the chime sounds and the message center says "Diesel exhaust fluid fault. Speed will be reduced to 50 MPH in 50 miles." CEL on too. Using the CTS, I checked the codes:

P20EE - SCR NOx Catalyst Efficiency Below Threshold (Bank 1)
P2080 - Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1

They were in the order shown. So the EGT fault came first, followed by the NOx fault.

I really need this truck today. Cleared the codes, but of course that didn't work with the 50 MPH limiting. Went back home and got the Jeep. The truck is about 1 mile away from the 50 MPH speed limiting.

It would seem that the EGT problem could lead to a NOx issue, but I could be wrong. I monitor EGT1 with the CTS, but I didn't see anything out of the ordinary. Also I thought an EGT fault usually gives the "Stop safely now" fault.

I did take a picture of the CTS DTC display before clearing the codes. Hope that will work for the dealer.

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