DTC Troubleshooting: P2647 (22)
  1. Measure voltage between rocker arm oil pressure switch 2P connector terminal No. 1 and body ground.
Is there battery voltage?
YES -
Repair open in the wire between the rocker arm oil pressure switch and G101, then go to Step 15 .
NO -
Go to Step 11 .
  1. Turn the ignition switch OFF.
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM connector C (44P).