B6.7 CM2450 B155B Fault Code: 4521 | SPN: 5862 | FMI: 2Aftertreatment 1 SCR Intermediate Gas Temperature Sensor – Data Erratic, Intermittent, or Incorrect

by DPFDELETE-TUNER | Mar 4, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 4521PID: SPN: 5862FMI: 2/2LAMP: AmberSRT:    The aftertreatment SCR intermediate temperature sensor reading is irrational.     Possible reduced engine performance. Circuit Description The aftertreatment SCR...

B6.7 CM2450 B155B Fault Code: 4449 | SPN: 6773 | FMI: 16Aftertreatment 1 Particulate Sensor Regeneration Status – Data Valid But Above Normal Operating Range – Moderately Severe Level

by DPFDELETE-TUNER | Mar 4, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 4449PID: SPN: 6773FMI: 0/16LAMP: AmberSRT:    The aftertreatment particulate matter sensor has detected in-range high sensor values.     Possible reduced engine performance. Circuit Description The...

B6.7 CM2450 B155B Fault Code: 4277 | SPN: 3364 | FMI: 10Aftertreatment 1 Diesel Exhaust Fluid Quality – Abnormal Rate of Change

by DPFDELETE-TUNER | Mar 4, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 4277PID: SPN: 3364FMI: /10LAMP: 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: 4276 | SPN: 4374 | FMI: 2Aftertreatment 1 Diesel Exhaust Fluid Pump 1 Motor Speed – Data Erratic, Intermittent, or Incorrect

by DPFDELETE-TUNER | Mar 4, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 4276PID: SPN: 4374FMI: 2/2LAMP: AmberSRT:    The aftertreatment diesel exhaust fluid dosing unit is running erratically.     Diesel exhaust fluid injection into the SCR aftertreatment system is disabled....

B6.7 CM2450 B155B Fault Code: 4259 | SPN: 5742 | FMI: 11Aftertreatment Diesel Particulate Filter Temperature Sensor Module – Root Cause Not Known

by DPFDELETE-TUNER | Mar 4, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 4259PID: SPN: 5742FMI: 11/11LAMP: AmberSRT:    Intermittent battery voltage supply detected at the aftertreatment diesel particulate filter temperature sensor module.     Possible reduced engine...

B6.7 CM2450 B155B Fault Code: 4243 | SPN: 3515 | FMI: 10Aftertreatment 1 Diesel Exhaust Fluid Temperature 2 – Abnormal Rate of Change

by DPFDELETE-TUNER | Mar 4, 2025 | Uncategorized

Overview   CODE REASON EFFECT Fault Code: 4243PID: SPN: 3515FMI: 10/10LAMP: AmberSRT:    Aftertreatment 1 Diesel Exhaust Fluid Temperature 2 – Abnormal Rate of Change     Possible reduced engine performance.   Circuit Description The...