B6.7 CM2450 B155B Fault Code: 3878 | SPN: 3364 | FMI: 2Aftertreatment 1 Diesel Exhaust Fluid Quality – Data Erratic, Intermittent, or Incorrect

by DPFDELETE-TUNER | Mar 3, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 3878PID: SPN: 3364FMI: 2/2LAMP: AmberSRT:    The diesel exhaust fluid quality sensor has reported a reading too high or low for the operating conditions.     Engine power derate. Circuit Description The DEF...

B6.7 CM2450 B155B Fault Code: 3868 | SPN: 3364 | FMI: 9Aftertreatment 1 Diesel Exhaust Fluid Quality – Abnormal Update Rate

by DPFDELETE-TUNER | Mar 3, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 3868PID: SPN: 3364FMI: 9/9LAMP: AmberSRT:    The Urea Quality Sensor has been unable to generate a concentration value for a period of time.     Engine power derate. Circuit Description The DEF quality...

B6.7 CM2450 B155B Fault Code: 3867 | SPN: 3364 | FMI: 18Aftertreatment Diesel Exhaust Fluid Quality – Data Valid But Below Normal Operating Range – Moderately Severe Level

by DPFDELETE-TUNER | Mar 3, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 3867PID: SPN: 3364FMI: 1/18LAMP: AmberSRT:    The diesel exhaust fluid (DEF) quality has been detected to be below a critical threshold.     Possible reduced engine performance. Circuit Description The...

B6.7 CM2450 B155B Fault Code: 3749 | SPN: 3226 | FMI: 20Aftertreatment 1 Outlet NOx Sensor – Data Not Rational – Drifted High

by DPFDELETE-TUNER | Mar 3, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 3749PID: SPN: 3226FMI: 2/20LAMP: AmberSRT:    An offset in the outlet NOx sensor reading has been detected.     None on performance. Circuit Description The aftertreatment outlet NOx (nitrogen oxides)...

B6.7 CM2450 B155B Fault Code: 3748 | SPN: 3216 | FMI: 20Aftertreatment 1 Intake NOx Sensor – Data Not Rational – Drifted High

by DPFDELETE-TUNER | Mar 3, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 3748PID: SPN: 3216FMI: 2/20LAMP: AmberSRT:    An offset in the intake NOx sensor reading has been detected.     None on performance. Circuit Description The aftertreatment intake NOx (nitrogen oxides)...

B6.7 CM2450 B155B Fault Code: 3725 | SPN: 3216 | FMI: 10Aftertreatment 1 Intake NOx Sensor – Abnormal Rate of Change

by DPFDELETE-TUNER | Mar 3, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 3725PID: SPN: 3216FMI: 10/10LAMP: AmberSRT:    The aftertreatment intake NOx sensor reading is not valid.     None on performance. Circuit Description The aftertreatment intake NOx (nitrogen oxides) sensor...