From Ross-Tech Wiki

18258/P1850 - Powertrain Data Bus: Missing Message from ECU

Possible Symptoms

  • MIL on
  • Warning light on

Possible Causes

  • Blown fuse for control module
  • Wiring Harness issue
  • Failed control module

Possible Solutions

  • Inspect wiring and terminals for CAN BUS between control modules.

Special Notes

  • As per TSB 01-07-54, do not replace the ECM for this DTC. Please see TSB for complete details.