Modules on the CAN bus cannot talk to each other reliably. Expect several warning lights at once and features that stop working for no obvious reason.
P0600 — also written PO6OO, P 0600, 0600 — is the OBD-II code for serial communication link malfunction. Same code, same fix: this page covers every spelling of it.
P0600 is a electrical fault code, typically costing £90–£900 to put right in a UK garage.
What causes P0600?
- Corroded or water-damaged connector on the bus
- Chafed CAN wiring
- One failed module dragging the bus down
- Poor earth
How P0600 is fixed
- Read fault codes from every module to find the one that has dropped off
- Inspect the loom at flex points and door harnesses
- Repair earths and connectors before replacing any module
P0600 repair cost in the UK
Most P0600 repairs land between £90–£900 including parts and labour. The spread is wide because the cheap fix (a sensor, a hose, a leak) and the expensive fix (a major component) throw the same code — which is why a proper diagnosis before parts are bought saves the most money.
Can you drive with P0600?
Depends on which systems are affected — drive with caution and get it scanned promptly.
Urgency: high.