Volvo Owners Club Forum - View Single Post - Engine 850: B5202S/2.0/10v:

stevepcar · Sep 28th, 2021, 13:58

Re my recent post about this, I am really surprised that nobody has done this. I know that the Air Pump is probably not a common fitting on UK cars, but I have read that they ofetn go wrong & they cost a fortune to replace. Deleting the pump from the system is the favoured method to overcome the problem. I have done this by soldering a diode into the ECU that make it thing the AP is still operational. However, I cannot get the EML to go out & the code still reads 4-4-2. Has anybody any experience or advice to give please?

Sep 28th, 2021, 13:58	#5
stevepcar Steve Last Online: Today 11:02 Join Date: Jul 2012 Location: Bristol	Deleting Secondary Air Pump System Re my recent post about this, I am really surprised that nobody has done this. I know that the Air Pump is probably not a common fitting on UK cars, but I have read that they ofetn go wrong & they cost a fortune to replace. Deleting the pump from the system is the favoured method to overcome the problem. I have done this by soldering a diode into the ECU that make it thing the AP is still operational. However, I cannot get the EML to go out & the code still reads 4-4-2. Has anybody any experience or advice to give please?