2 SPN 4334/FMI 7 - EPA10 This diagnostic is typically DEF Pressure Low. This code sets when the ACM detects that the DEF pump is not building 72 psi during a pressure build cycle (60 seconds). Table 1. SPN 4334/FMI 7 Description DEF Pressure Low Monitored Parameter DEF Pressure Typical Enabling Conditions Pressure Limiting Unit On, Dosing Enabled

Inspect the ACM 120-pin connector and 120-pin harness connector for signs of damage, bent, spread, broken, pushed out (unseated) or corroded pins or wire damage near the connector. Is any damage found? a. Yes; repair as needed. Verify repairs. b. No; Go to step 7. 7.

2 SPN 4334/FMI 3 - EPA10 DEF pressure sensor circuit failed high Table 1. SPN 4334/FMI 3 Description This code sets when the Aftertreatment Control Module (ACM) detects a short to voltage or open on the Diesel Exhaust Fluid (DEF) Pressure Sensor Circuit Monitored Parameter Diesel Exhaust Fluid (DEF) Pressure Sensor

2023年5月24日 · The SPN4334 FMI 4 fault code stands for Def Pressure Sensor Circuit Failed Low. This is an electrical fault code and it is telling you that there is a short between the Diesel Exhaust Fluid (DEF) Pressure Sensor Circuit and the ground. To learn more about this code and its variety of FMI options, just continue to read our article.

Detroit DD13 GHG14 (2014-16) Fault Code: SPN 4334 FMI 4 (ACM) Diesel Exhaust Fluid Pressure Sensor Circuit Failed Low DESCRIPTION: Diesel exhaust fluid (DEF) pressure sensor circuit voltage below normal, or shorted to low source.

Detroit DD13 EPA10 (2010-13) Fault Code: SPN 4334 FMI 17 (ACM) Diesel Exhaust Fluid (DEF) Purge Pressure High DESCRIPTION: Diesel exhaust fluid (DEF) purge pressure high.

2008年12月29日 · Only on uphills and only this code. This code says Low DEF Pressure. I did all procedures as mentioned in PSL for this code troubleshooting (checking the screens, puling def lines and checking them, running air pressure test by DL,...). Nothing was found. I repeated the procedures three times. I cleared the code and sent truck to work.

use an air pressure gauge and make sure there is 75-80 lbs air pressure to the metering block from the PLV. 2011 freightliner M2 classic DD13, has code SPN 4334 FMI 7. Have a 2012 freightliner cascadia. Getting a code SPN 4334.

Detroit DD15 EPA10 (2010-13) Fault Code: SPN 4334 FMI 4 (ACM) Diesel Exhaust Fluid Pressure Sensor Circuit Failed Low DESCRIPTION: This code sets when the Aftertreatment Control Module (ACM) detects a short to ground on the …

2014年4月13日 · Spn 4334 7 is basically telling you that no or little def is reaching the meter unit and is not spraying enough of it to the aftermath treatment. There's many possibilities, but you should check in a priority order.