DTC Troubleshooting: P2002 (187)
DTC P2002:
 DPF Efficiency Below Threshold
Special Tools Required

Gauge 600 kPa
 07YAJ-0010100
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Clear the DTC 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. Hold the engine speed above 3,000 rpm (min −1 ) without load (in neutral) for 20 seconds.
  1. Monitor the OBD STATUS for DTC P2002 in the DTCs MENU with the HDS.
Does the screen indicate FAILED?
YES -
Go to Step 7 .
NO -
If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the DPF differential pressure sensor and the ECM. If the screen indicates NOT COMPLETED, go to Step 1 and recheck.
  1. Turn the ignition switch OFF.
  1. Check for a looseness exhaust pressure lines between the DPF differential pressure sensor and the DPF.
Are the lines OK?
YES -
Go to Step 9 .
NO -
Reconnect the exhaust pressure line(s), then go to Step 26 .
  1. Visually check the DPF body condition.
Is the condition OK?
YES -
Go to Step 10 .
NO -
Replace the DPF, then go to Step 26 .
  1. Disconnect the exhaust pressure lines between the DPF differential pressure sensor and the DPF.
  1. Apply vacuum to front exhaust pressure line (A).
Does it hold vacuum?
YES -
Check for a restricted between the DPF differential pressure sensor and the DPF, then go to Step 25 .
NO -
Go to Step 12 .