P0600 Serial Communication Link Malfunction
What does P0600 mean?
P0600 — Serial Communication Link Malfunction. This is an OBD-II diagnostic trouble code a scanner retrieves when your vehicle's computer detects serial communication link malfunction. The level of risk depends on how the vehicle is currently running and how long you've been driving with the light on.
Common causes of P0600
- Damaged or shorted wiring between modules
- Corroded or loose connector pins
- Faulty network interface in a module
- Electromagnetic interference on the bus
- Failed module pulling the network down
How to fix P0600
- Scan all modules for communication and lost-communication codes
- Check the shared data bus wiring for shorts or opens
- Inspect network connectors for corrosion or bent pins
- Isolate modules on the bus to find the one causing dropouts
- Repair damaged wiring or replace the failing module