What are the possible causes of DTC U1116?
NOTE: The causes listed may not be a complete list of all potential issues, and there could be other causes.
- Faulty module that is not communicating
- The module’s wiring harness is open or short-circuited
- Poor electrical connection in the module’s circuit
How to fix DTC U1116?
Review the “Possible Causes” mentioned above and visually inspect the corresponding wiring harness and connectors. Be sure to check for any damaged components and inspect the connector pins for signs of breakage, bending, dislodgement, or corrosion.
What are the possible symptoms of code U1116?
- Check engine light on (or engine maintenance warning light soon)
Code U1116 Description
Modules connected to the serial data circuit monitor for class 2 serial data communications during normal vehicle operation. Operating information and commands are exchanged between modules. When a module receives a message for a critical operating parameter, it records the identification number of the module that sent the message for health monitoring. A critical operating parameter is one that, if not received, requires the module to use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within 5 seconds of the start of serial data communication, the diagnostic trouble code (DTC) is set.