PACCAR PX-9 CM2350 (2013-17) Fault Code:3135 PID: SPN:3610 FMI:2 Aftertreatment 1 Diesel Particulate Filter Outlet Pressure – Data Erratic, Intermittent, or Incorrect
Reason:
Aftertreatment Diesel Particulate Filter Outlet Pressure – Data Erratic, Intermittent or Incorrect. The aftertreatment diesel particulate filter outlet pressure sensor is reading an erratic value at initial key ON or during engine operation.
Effect:
Possible reduced engine performance.
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:
1) One part runs when the keyswitch is initially turned ON before the engine is started
2) 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:
1) The ECM illuminates the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL) after the diagnostic fails on two consecutive trips.
2) Diesel exhaust fluid injection into the aftertreatment system is disabled.
3) 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:
1) To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
2) The fault code status displayed by INSITE™ electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
3) The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
4) 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.
5) The Reset All Faults command in INSITE™ electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.
Shop Talk:
Note: It is possible to set this fault in a shop environment by performing a key cycle with the tailpipe connected to an exhaust ventilation system.
Reference the appropriate OEM wiring diagram when troubleshooting circuits that utilize wiring supplied by the OEM.
Possible Causes:
1) Stuck in-range aftertreatment diesel particulate filter outlet pressure sensor reading
2) High resistance in the aftertreatment diesel particulate filter outlet pressure sensor signal or return wires
3) Higher than expected diesel particulate filter outlet pressure
4) Excessive diesel exhaust fluid (DEF) deposits in the aftertreatment decomposition tube
5) Plugged aftertreatment outlet pressure sensor ports could cause this fault code if pressure is held in the port after the engine is turned OFF.
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