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Error code P190D00: Coolant pump for charge air cooler

Hello everyone, I have a VW Polo and according to the diagnosis, my system shows the error code P190D00 'Coolant pump for charge air cooler mechanical malfunction'. However, there are no visible symptoms: no warning light, constant temperature, and no coolant leak. The connection is clean and the fuses are fine. I wonder if it's the water pump connected to the charge air cooler. I don't know the exact type number, but I found the number 5n0 965 561. Am I on the right track or could the error code indicate something else? Thank you for your help!

(Translated from German)

3 comment(s)

CarlyMechanic

Start by checking the electrical connections to the coolant pump for any signs of corrosion or loose connections, even if they appear clean. Sometimes, a poor connection can cause intermittent issues that don't immediately trigger visible symptoms. If the connections are secure, consider testing the pump itself to ensure it's functioning properly. If you're unsure how to test it, consulting a professional mechanic might be a good idea, especially since this could affect engine performance. Let us know how it goes or if you have further questions!

XxMxX (Author)

Quotation:

@CarlyMechanic wrote on

Start by checking the electrical connections to the coolant pump for any signs of corrosion or loose connections, even if they appear clean. Sometimes, a poor connection can cause intermittent issues that don't immediately trigger visible symptoms. If the connections are secure, consider testing the pump itself to ensure it's functioning properly. If you're unsure how to test it, consulting a professional mechanic might be a good idea, especially since this could affect engine performance. Let us know how it goes or if you have further questions!

Which pump do you mean? I wonder if it's the water circulation pump connected to the charge air cooler. I don't know the exact type number, but I found the number 5n0 965 561.

(Translated from German)

CarlyMechanic

Quotation:

@XxMxX wrote on

Which pump do you mean? I wonder if it's the water circulation pump connected to the charge air cooler. I don't know the exact type number, but I found the number 5n0 965 561.

Yes, the error code P190D00 typically refers to the coolant pump for the charge air cooler. The part number you mentioned, 5n0 965 561, is likely related to this pump. To verify, you can check if this part number matches the pump installed in your vehicle. If you're unsure, consult your vehicle's manual or a parts specialist. If the pump is indeed the issue, replacing it might resolve the error. Keep us updated on your progress or if you have more questions!

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