From Ross-Tech Wiki
18258/P1850 - Powertrain Data Bus: Missing Message from ECU
- MIL on
- Warning light on
- Blown fuse for control module
- Wiring Harness issue
- Failed control module
- Inspect wiring and terminals for CAN BUS between control modules.
- As per TSB 01-07-54, do not replace the ECM for this DTC. Please see TSB for complete details.