07-24-2023, 03:53 PM | #1 |
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20a201 charge air cooling system coolant pump protective function active due to dry
Hi there, I am scanning my car as I am getting drive train issues when driving hard and the car is warm.
One error is: 20a201 charge air cooling system coolant pump protective function active due to dry running. I have a 2019 F90 M5 and I have checked the charge cooling system. It had no fluid on the first check - I have topped this up and the cooling system appears to be holding. I drained some of the water and put in some more BMW HT-12 as recommended by the dealership. I do however still have this code showing. Does this mean that there is a defective part on the car? Which part is failing? How can I reset the code to see if now that I have coolant in there that it runs fine? Thanks in advance all for the help! Andy |
07-25-2023, 09:58 AM | #2 |
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Drives: F90 M5 / F15 50i
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Numerous ways to erase codes. Google search will give you more options than you can hope for. In short. BimmerLink app is one of the easiest. You’ll need a OBD -> phone adapter from Amazon. Recommend hard wire over Bluetooth/Wi-Fi.
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07-25-2023, 11:34 AM | #4 |
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An air pocket can prevent pump operation. Factory procedure is to use vacuum fill, but that is for refilling the system rather than minor tipping off. I had my system partially drained when changing intercoolers, did not do a vacuum refill, and had no problems. But the level was still well above pump level.
If it is not an air pocket, I would question whether the pump is running. Not sure you could reach it to listen with a stethoscope from above. Might have to pull the forward shield and feel or use a stethoscope from below. If you can identify a fuse for the pump, that is also worth checking. |
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