X15 CM2350 X116B Fault Code: 3135 | SPN: 3610 | FMI: 2Aftertreatment 1 Diesel Particulate Filter Outlet Pressure – Data Erratic, Intermittent, or Incorrect

Overview

Circuit Description

The engine control module (ECM) provides a 5 volt supply to the aftertreatment diesel particulate filter outlet pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The aftertreatment diesel particulate filter outlet pressure sensor provides a signal to the ECM on the aftertreatment diesel particulate filter outlet pressure sensor signal circuit. This sensor signal voltage changes based on the pressure at the outlet of the aftertreatment diesel particulate filter.

Component Location

The aftertreatment diesel particulate filter differential pressure sensor is mounted on the diesel particulate filter. It is a combination sensor that detects both diesel particulate filter differential pressure and outlet pressure. Refer to the original equipment manufacturer (OEM) service manual.

Conditions for Running the Diagnostics

This diagnostic consists of two parts:

• One part runs when the keyswitch is initially turned ON before the engine is started
• The second part runs continuously while the engine is running.

Conditions for Setting the Fault Codes

The Engine Control Module (ECM) detected the aftertreatment diesel particulate filter outlet pressure was greater than 1.5 kpa [0.22 psi] or less than -1.5 kpa [0.22 psi] at initial key ON, or was not changing with engine conditions.

Action Taken When the Fault Code is Active

• The ECM illuminates the amber CHECK ENGINE lamp and/or malfunction indicator lamp (MIL) after the diagnostic fails on two consecutive trips.
• Diesel exhaust fluid injection into the aftertreatment system is disabled.
• Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.

Conditions for Clearing the Fault Code

• Turn the key switch OFF and allow the ECM to completely powerdown.
• To validate the repair, perform a key cycle and leave the key in the ON position for 2 minutes. Then start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• For On-Board Diagnostics (OBD) engines, the ECM will extinguish the Malfunction Indicator Lamp (MIL) after three consecutive trips where the diagnostic runs and passes.
• The “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk

Possible causes of this fault code include:

• Malfunctioning or damaged OEM wiring harness.
• Frozen, plugged, or restricted aftertreatment DPF differential pressure sensor tubes.
• Malfunctioning or damaged aftertreatment diesel particulate filter differential pressure sensor.
• Diesel exhaust fluid deposits in the decomposition tube.
• High exhaust restriction.