DTC Troubleshooting: P2455 (187)
  1. Check for continuity between ECM connector No. 1 terminal No. 12 and body ground.
Is there continuity?
YES -
Go to Step 24 .
NO -
Repair open in the wire between the DPF differential pressure sensor and ECM connector No. 1 terminal No. 12, then go to Step 20 .
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Disconnect ECM connector No. 1 (96P).