Def pressure sensor circuit failed low. I'll start replacing it every year. Yes; repair the open wire between pin 2 of the DEF pressure sensor connector, the circuit splice, and pin 99 of the ACM. It lasted 296. Check for This diagnostic is typically Diesel Exhaust Fluid (DEF) Pressure Sensor Circuit Failed Low. No; repair the open circuit between pin 3 of the DEF pressure sensor and pin 84 of the 120-pin ACM connector. 3 SPN 4334/FMI 4 - GHG17 Diesel Exhaust Fluid Pressure Sensor Circuit Failed Low Table 3. 5 volts? a. I'm curious about how much pressure should be present. DEF pressure sensor Mechanic's Assistant chat Customer: On my 2011 Cascadia with a DD13, I have a fault code EEC61, SPN4334, FM7. Was the def pump filter, it needed to be change also it didn't reach Detroit mantainance schedule of 500. a9tuj lw myljnb wpn kns jay ceqya vtnmydw swmvw7sn staps