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

stevepcar · Sep 9th, 2021, 16:13

i have just come into possession of a 1996 2.0l 850 with an air pump. I was intending to use it as a donor car, for my 2.5 850 & my 850 T5. But being soft of head & heart, I think I may try and get it back on the road. It has 2-rotten front wings & a gouge that covers both nearside doors & the rear near side wing. However, it has a long and extensive service record and runs sweetly. It is showing an EML which when the code is read points to a faulty Air Pump. It has been replaced before, but they do not seem to last long. I have seen a Robert DIY mod whereby you can delete the pump by soldering a diode from points 32 to 37 in the ECU, or between 2-wires in the harness under the ECU.. Has anybody carried this out successfully and if so can you advise which diode I should get from RS please.

Sep 9th, 2021, 16:13	#1
stevepcar Steve Last Online: Today 11:02 Join Date: Jul 2012 Location: Bristol	Deleting the Secondary Air Pump i have just come into possession of a 1996 2.0l 850 with an air pump. I was intending to use it as a donor car, for my 2.5 850 & my 850 T5. But being soft of head & heart, I think I may try and get it back on the road. It has 2-rotten front wings & a gouge that covers both nearside doors & the rear near side wing. However, it has a long and extensive service record and runs sweetly. It is showing an EML which when the code is read points to a faulty Air Pump. It has been replaced before, but they do not seem to last long. I have seen a Robert DIY mod whereby you can delete the pump by soldering a diode from points 32 to 37 in the ECU, or between 2-wires in the harness under the ECU.. Has anybody carried this out successfully and if so can you advise which diode I should get from RS please.