P1681 OBD Code Definition:
No I/P Cluster CCD/J1850 Messages Received
P1681 OBD Code Description:

Possible Symptoms

• Malfunction Indicator Light (MIL) active

Possible Causes

• Flash/Update not finished

Possible Solutions

• Perform Control Module Software Update again
• If Chipped/Remapped, contact Aftermarket Chiptuner for Help