DTC Troubleshooting: P242F (187)
  1. Connect the pressure side of vacuum pump (A) and the gauge 600 kPa to the DPF differential pressure sensor port (B) as shown.
    NOTE:
    • Do not connect the vacuum side of vacuum pump to the DPF differential pressure sensor port (B).
    • Do not connect the vacuum pump to the DPF differential pressure sensor port (C).
  1. Slowly apply 40 kPa (0.41 kgf/cm 2 , 5.8 psi) of pressure to the sensor.
  1. Check the DIESEL PARTICULATE FILTER (DPF) DIFFERENTIAL PRESSURE in the DATA LIST with the HDS.
Is there about 30−50 kPa (0.30−0.51 kgf/cm 2 , 4.35−7.25 psi)?
YES -
Go to Step 20 .
NO -
Replace the DPF differential pressure sensor, then go to Step 26 .
  1. Slowly apply 80 kPa (0.81 kgf/cm 2 , 11.6 psi) of pressure to the sensor.
  1. Check the DIESEL PARTICULATE FILTER (DPF) DIFFERENTIAL PRESSURE in the DATA LIST with the HDS.
Is there about 70−90 kPa (0.71−0.92 kgf/cm 2 , 10.15−13.05 psi)?
YES -
Go to Step 22 .
NO -
Replace the DPF differential pressure sensor, then go to Step 26 .
  1. Turn the ignition switch OFF.
  1. Connect all exhaust pressure lines.
  1. Start the engine.
  1. Do the DPF Regeneration.
Is the result OK?
YES -
Go to Step 28 .
NO -
Follow the result, then go to Step 26 .
  1. Reconnect all exhaust pressure lines.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Start the engine, and keep idling until the engine coolant temperature becomes 70 °C (158 °F).
  1. Test-drive under these conditions:
    • Engine coolant temperature (ECT SENSOR 1) above 70 °C (158 °F)
    • On flat route
    • Transmission in 2nd gear
    • Vehicle speed above 60 km/h (38 mph)
    • Drive about 30 seconds or more
  1. Test-drive the vehicle for 20 seconds in the range of these recorded freeze data parameters:
    • VEHICLE SPEED
    • ENGINE SPEED
  1. Check for Temporary DTCs or DTCs with the HDS.
If DTC P242F indicated?
YES -
Check for poor connections or loose terminals at the DPF differential pressure sensor and the ECM, then go to Step 1 .
NO -
Go to Step 33 .
  1. Monitor the OBD STATUS for DTC P242F in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in Step 32 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the DPF differential pressure sensor and the ECM, then go to Step 1 . If the screen indicates NOT COMPLETED, go to Step 29 .