P0791 Intermediate Shaft Speed Sensor "A" Circuit - Hyundai Genesis Forum
 
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post #1 of 2 Old 12-11-2018 Thread Starter
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Unhappy P0791 Intermediate Shaft Speed Sensor "A" Circuit

Hi guys, so I've got this code "P0791" on my BK2 3.8 AT and from what I've noticed the transmission is constantly going for the highest gear now. When you floor it the gears will drop but if you let the throttle off (even barely) the transmission will upshift immediately. Then if you will press it again a bit it will downshift, itís back and forward like this.
I expect this to be because the transmission doesn't know the speeds it cannot really determine the correct shift points. Maybe someone knows the location of that sensor or has materials what to check when the code pops-out?

I love the car but it is totally unpopular in Poland (there are benefits of that ) so the mechanics aren't familiar with the engine or the transmission. I don't want a situation that I will pay lots of money to a mechanic which in the end will say that the only thing he can do is swapping the transmission...

Wanted to add that this is the only code i have.

'13 3.8 A/T Catalunya Copper BK2
----------------Spiced Up with--------------------
- Brembo
- LSD
- Injen SES Catback
- 20" TSW Bathurst (FR) rolling with Dunlops
- K&N air filter drop-in
- Koito Bi-Led
- ExLed active turn signals
- Focal AS 165
- StP Gold Aero sound proofing.
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post #2 of 2 Old 4 Weeks Ago Thread Starter
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Just a FYI, in the end I've bought another transmission as the old one started to make odd sounds plus it was becoming jerky. Also it appeared the mentioned sensor is inside the transmission on the control plate and the delarship in Poland didn't had access to the part.

Everything is good since then.

'13 3.8 A/T Catalunya Copper BK2
----------------Spiced Up with--------------------
- Brembo
- LSD
- Injen SES Catback
- 20" TSW Bathurst (FR) rolling with Dunlops
- K&N air filter drop-in
- Koito Bi-Led
- ExLed active turn signals
- Focal AS 165
- StP Gold Aero sound proofing.
emil is offline  
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3.8 , automatic , transmission

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