Engine 850: B5252S/2.4/10v: - MAFF Sensor ?

stevepcar · Jan 23rd, 2021, 13:22

Hello my car is a 1995 850 10 v NA with 10 valves manual. What I am not sure of is: does it have a MAFF, or is the sensor in the main hose from air box to throttle housing an air intake temp sensor. If that is the case, will it have a MAP instead, if it does where will I find it please?

Cookeh · Jan 23rd, 2021, 13:38

The following is true for Motronic 4.3/4.4, I've never owned a Fenix 5.2 car so not sure how much is transferrable, but the locations should allow you to at least check for the presence of each. The sensor in the airbox to throttle-body is a MAF, you also have a map sensor behind the o/s headlight, and your air temperature sensor is located behind the n/s foglight grill.

stevepcar · Jan 23rd, 2021, 13:42

Thanks but just realised I am being a Wally!!! My car has a Fenix 5.2 as you say. From reading the Haynes manual & looking at my car, it has a IAT sensor in the main intake tube where the MAFF is in a Turbo equipped car & a MAP in the relay carrier above the radiator. I just need to check both of them now as I have a hesitation/hot start problem that I am trying to diagnose. Any help as always greatly appreciated.

Jan 23rd, 2021, 13:22	#1
stevepcar Steve Last Online: Yesterday 10:13 Join Date: Jul 2012 Location: Bristol	MAFF Sensor ? Hello my car is a 1995 850 10 v NA with 10 valves manual. What I am not sure of is: does it have a MAFF, or is the sensor in the main hose from air box to throttle housing an air intake temp sensor. If that is the case, will it have a MAP instead, if it does where will I find it please?

Jan 23rd, 2021, 13:38	#2
Cookeh Premier Member Last Online: Sep 14th, 2022 17:04 Join Date: Jan 2018 Location: Derbyshire	The following is true for Motronic 4.3/4.4, I've never owned a Fenix 5.2 car so not sure how much is transferrable, but the locations should allow you to at least check for the presence of each. The sensor in the airbox to throttle-body is a MAF, you also have a map sensor behind the o/s headlight, and your air temperature sensor is located behind the n/s foglight grill. __________________ 1995 Volvo 850 T5 Estate (Manual)

Jan 23rd, 2021, 13:42	#3
stevepcar Steve Last Online: Yesterday 10:13 Join Date: Jul 2012 Location: Bristol	Air Intake Temp Sensor Thanks but just realised I am being a Wally!!! My car has a Fenix 5.2 as you say. From reading the Haynes manual & looking at my car, it has a IAT sensor in the main intake tube where the MAFF is in a Turbo equipped car & a MAP in the relay carrier above the radiator. I just need to check both of them now as I have a hesitation/hot start problem that I am trying to diagnose. Any help as always greatly appreciated.

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