850 2.5 1995. Lamda light on

Prouds70 · Nov 3rd, 2017, 20:00

Hi folks. I got a new stainless steel exhaust fitted to my 850
including a new sports cat. Ever since the lamda light is on. I've tried to delete the code but no joy. The company that fitted the exhaust said they had no hassle removing the sensor or re-fitting it. Also said it looked in good condition. Any help would be appreciated as it's mot day on Monday.

Luxobarge · Nov 3rd, 2017, 21:31

What code is it giving?

Prouds70 · Nov 3rd, 2017, 21:58

521 Front HO2S Preheating

milgo86 · Nov 18th, 2017, 20:43

From what I've read it seems like sports cat will do this on some cars. You can space the sensor away from the boss to take it out of the exhaust flow. Must have some impact when it is running closed loop though.

Nov 3rd, 2017, 20:00	#1
Prouds70 New Member Last Online: Nov 11th, 2017 12:39 Join Date: Aug 2016 Location: Dunfermline fife	850 2.5 1995. Lamda light on Hi folks. I got a new stainless steel exhaust fitted to my 850 including a new sports cat. Ever since the lamda light is on. I've tried to delete the code but no joy. The company that fitted the exhaust said they had no hassle removing the sensor or re-fitting it. Also said it looked in good condition. Any help would be appreciated as it's mot day on Monday. Last edited by Prouds70; Nov 3rd, 2017 at 21:59.

Nov 3rd, 2017, 21:31	#2
Luxobarge Premier Member Last Online: Yesterday 22:59 Join Date: Jan 2011 Location: Horne (Nr. Horley)	What code is it giving? __________________ Some people are like Slinkies, they serve no useful purpose but they still bring a smile to your face when you push them downstairs.

Nov 3rd, 2017, 21:58	#3
Prouds70 New Member Last Online: Nov 11th, 2017 12:39 Join Date: Aug 2016 Location: Dunfermline fife	521 Front HO2S Preheating

Nov 18th, 2017, 20:43	#4
milgo86 Junior Member Last Online: Feb 15th, 2020 22:33 Join Date: Sep 2017 Location: Chelmsford	From what I've read it seems like sports cat will do this on some cars. You can space the sensor away from the boss to take it out of the exhaust flow. Must have some impact when it is running closed loop though.

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