Quote:
Originally Posted by Ukraine Train
I have an '08 135i and it seems my water pump has died. If I don't clear the 'shadow codes' will the cooling fan keep blasting on high even after I replace the pump? Or will it go back to normal once the ECU sees that the pump is operational again?
Is there a way to bench test the pump to verify it's really dead? I'm not sure I can just jump 12v to it since it's controlled by the ECU. When I do the coolant bleed procedure in the car I don't hear it running, but I'm not sure if it's that loud even when working.
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You'll definitely hear it when it's bleeding