Join Date: Jan 2018
Feedback Score: 0 reviews
Another P207F problem
I'm pretty new to the diesel arena. I come from a car background (specifically BMW) but now I work at NC DOT and help keep the trucks running. I'm on a 2011 F350 with 197k miles on it. It's one of our IMAP trucks - the ones that help folks on the highways and interstates.
I've got access to IDS and the Ford factory website, but am somewhat new to navigating the IDS software and the Ford site, so I'm still trying to root through and find information.
The truck set 2 codes originally, about 200 miles ago. It set P20EE (SCDR NOx Catalyst Efficiency Below Threshold Bank 1) and P207F (Reductant Quality Performance). I found TSB 15-0042 and per that bulletin replaced the NOx sensor, reset the NOx adaptations, and sent the truck on. It came back a few days later, with another check engine light, and this time, only the P207F code, and cluster messages saying "55 mph limit in 119 miles" and "Contaminated Exhaust Fluid".
I have tested the DEF with a refractometer and it was at 32%, maybe 32.1%, but not 32.5%. I'm assuming that what I have (32%) is close enough to be OK. I have not been able to check the DEF for contamination since we don't have those test strips, but I did drain over 4 gallons of DEF out of the tank and refilled it from our 55 gallon barrel that we use for all the trucks and the P207F error still came back after clearing it and test driving again. I just don't think the DEF is actually contaminated. If it was, then we'd have the whole fleet with the 207 DTC.
This truck has been into the dealership 3 times for reflashes, June 2012 for 12B34, Feb 2015 for 14E03, and July 2016 for 16B24.
Does anyone have any ideas? I can go drive the truck with the IDS laptop hooked up and monitor the sensors, but I'm still digging around (my IDS software UNfamiliarity here) to find the parameters I need to look for and what they should be. I'd like to see what the NOx sensor is doing, but am trying to figure out that screen in IDS.
Any hints or points in the right direction would be welcomed.