HI,
help me to solve this problem, please!
I just replaced the fan of my l322 tdv8 4.4: it seems that now the viscous coupling is always active and consequently the fan runs constantly at high revs making the car noisy.
the error codes are.
- P0483-27 (2A) Fan performance-general signal failure-signal rate of change is above the threshold
-P041D-00(2f) exhaust gas recirculation temperature sensor B -circuit high
-P040D-00 (2f) exhaust gas recirculation temperature sensor A - circuit high.

What do you recommend?

May not be your cause but my Thermostat housing was damaged by the garage when repairing stg else, which made the fan run all the time. This affected the DPF regen process and all well again when Thermost housing replaced.