OBD code P0852 "park/neutral switch high" - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

headfake · 07-13-2021, 04:29 AM

Hi,

I have a 2016 Scion FR-S, stock, manual transmission. It has a P0852 OBD code ("park/neutral switch high") that's blocking me from getting an emissions test (it comes back on if you clear it).

I guess it has something to do with detecting the position of the shift lever; I also noticed:

rear view camera does not turn on in reverse (used to work)
the gear indicator that you can turn on on the dash doesn't show up (only shows the up arrow for the fuel economy shifting)

I can see on the OBD scanner that the clutch position sensor still works, and it does require you to push in the clutch to start it. There are also "reverse" and "neutral" switches that you can see on the OBD and neither of them ever change.

Is there any chance there's just some loose connection I could easily find? Or should I just take it to the dealer?

Thanks for any help

Tcoat · 07-13-2021, 07:42 AM

It is your neutral switch then.
Here is the repair manual.
https://gt86stuff.onrender.com/t3Portal/

Just follow the tree until you get to the switch repair.

07-13-2021, 04:29 AM	#1
headfake Junior Member Join Date: Jul 2021 Drives: 2016 Scion FR-S Location: Scottsdale, AZ Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	OBD code P0852 "park/neutral switch high" Hi, I have a 2016 Scion FR-S, stock, manual transmission. It has a P0852 OBD code ("park/neutral switch high") that's blocking me from getting an emissions test (it comes back on if you clear it). I guess it has something to do with detecting the position of the shift lever; I also noticed: rear view camera does not turn on in reverse (used to work) the gear indicator that you can turn on on the dash doesn't show up (only shows the up arrow for the fuel economy shifting) I can see on the OBD scanner that the clutch position sensor still works, and it does require you to push in the clutch to start it. There are also "reverse" and "neutral" switches that you can see on the OBD and neither of them ever change. Is there any chance there's just some loose connection I could easily find? Or should I just take it to the dealer? Thanks for any help

07-13-2021, 07:42 AM	#2
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,285 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	It is your neutral switch then. Here is the repair manual. https://gt86stuff.onrender.com/t3Portal/ Just follow the tree until you get to the switch repair. Attached Images __________________ Racecar spelled backwards is Racecar, because Racecar.

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