Junior Member, warming up (<31 posts)
Join Date: Jul 2016
Location: Cincinnati, OH, US
Thanked 2 Times in 2 Posts
I've done a few swaps/replacements of aux fans and main fans of the on the S62 and M62 engines, and I don't think the mechanical fan clutch was controlled electronically in any way.. however, the aux fan (the electric one on the front of the radiator) definitely is, and is commanded on by the DME based on A/C load, radiator outlet temperature, intake air temperature, and vehicle speed.
Those OBD codes are for failure of secondary air injection, if that was working before, the pump probably came unplugged during the bumper swap. It's behind the fog light on the front passenger side of the car (LHD models).
If the mechanical cooling fan ISN'T spinning with the engine at idle, it sounds like the mechanical fan clutch may have failed.. although, I've only seen them fail to disengage, not fail to engage..but anything is possible. Could also be water pump issues, water pump not being driven properly by it's belt..