Hi I’ve got a fault code P26F700 Coolant Pump 'C'supply voltage Circuit.

I’ve changed the pump with a Bosch (0 392 024 01E)

Still getting the fault code pop up!

I have seen quite a lot of people post about them but never get to the root cause or how they fix it ?

Any help would be greatly appreciated

Cheers

other posts refer to limited success replacing with usually good oem equivalents. I'e. pieburg, bosch etc... There's probably 2 electric pumps too - have you got the right one?

Other fault finding stream would be wiring tracing.. Start at the connector end and trace and test. A wiring diagram will be needed to help.

Have you tried unplugging the pump momentarily and see what ECU error is reported. does it change to open cct??