P2797 with subcode 865 on 2008 gs 450h - ClubLexus - Lexus Forum Discussion

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P2797 with subcode 865 on 2008 gs 450h

 
Old 04-21-17, 02:12 AM
  #1  
lexusisgs
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Question P2797 with subcode 865 on 2008 gs 450h

Hi there this morning I had surprise from my gs.

code P2797 pop up.
I was reading around threads related to this same issue but couldnt find wher to buy bearings for transsmission oil pump .

I hope that is what causing problem.
Car will start in limp mode.
Hybrid will not kick in. I can drive all day but no hybrid and on expressway will give you chance to drive only up to 70 miles per hour.(about 115 km/h)
checked all 3 modes hybrid powerr,hybrid snow,hybrid normal and every time is up to 70 mil/hour maximum speed.
removed transsmission protective cover and checked for loose or coroded connection ,nothing found.
checked also small module under air box and no lose connection eather.
so now left is only oil pump and try to replace bearing only.

Does anybody know where to buy those bearings,could you post link or just pm me.
​​​​​​​thanks.
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Old 04-21-17, 06:14 PM
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Question

I got place to build bearing but does anybody know dimensions ,specs of those bearings please.
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Old 04-24-17, 11:09 PM
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Default Finally first part done.

First of all thank you all for help.
I got all info regarding rebuilding aux.transs.oil pump.
1,part number for inside bearing 61900-2Z skf
2,part number for 2nd bearing 608-2Z skf
3,u will need about 5 liter of ATF WS OIL
4,mini bearing puller ...C picture attached.
Disconnect battery and orange plug just in case.
Beginning was easy,first was to remove plastic cover after that remove bracket from flanges of exhaust pipes .Than drained​ fluid .. disconnect transmission lines (watch for gaskets washer 4 in total ) .
4 bolts removed from housing on tranny's and pump was free attached to cable only.( Do top 2 screws first than bottom 2screws )
Rubber line was disconnected too from pump housing.
next was to remove 4 bolts holding blk housing of the pump.when that step was done now we got into problem.
3 screws holding cover and damaged bearing we're rusted.
No way around ... eather drill it or tap it or use locking pliers.
Finally , all 3 were removed and shaft was free.
Bearing was completely destroyed .Bearing parts all over housing.
Inner bearing was ok but anyway We did replaced it too.

Rebuilding pump was educational and Economical because dealer wanted about $3,000.00 just for the pump plus labor.Wow.
But still I like my dealership because they give me always access to all parts and all diagrams and picture s in order to make it more easy for me.
Well not all ppl are with skills to work on the car ,due to luck of confidence, laziness,luck of skills ,and some got a lot 💰,...Some ppl believe that dealer will do best and that is good because dealer should get some Money too.
Our job is to help ppl entusiast they are willing to fix thing by themselves.
H noere is some picks of parts and pump.
Attached Thumbnails P2797 with subcode 865 on 2008 gs 450h-img_20170424_093016.jpg   P2797 with subcode 865 on 2008 gs 450h-img_20170424_140515.jpg   P2797 with subcode 865 on 2008 gs 450h-img_20170424_140524.jpg   P2797 with subcode 865 on 2008 gs 450h-img_20170424_140529.jpg   P2797 with subcode 865 on 2008 gs 450h-img_20170424_141214.jpg  

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Old 04-24-17, 11:25 PM
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After rebuild was done code came up again.
P2797.??????
We have used OBD2code reader to clr code but no success.
We put car back on hoist and give it a bit pounding around blk housing of the oil pump.
Now I was able to reset code and start driving.
After 1 hour of driving still code come back but now hybrid was working.So strange.
We reset code again and start driving 4 hours after no code anymore.
Is it possible that bearing got some braking time,like new brakes and rotors or what.
Is it possible that ECU taking samples of new rpm on the shaft or something else.

Very odd .....But fuel economy was gr8 and as u can still see it is ready for another 300 000 km

We are so gr8full for this forum.
Until next time cheers. Fuel economy after rebuilding oil pump.
High milage but still very strong.

Lexus will compete with my Nissan Altima hybrid which is over 600 000km as u can c.
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Old 08-16-18, 09:36 PM
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My H got error code p2797. I did testing and figured it wasn't the control module. So i opened up the aux pumpand the front bearing was toasted. Car is back to normal again. Thanks OP
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Old 08-27-18, 09:07 AM
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I have 204k on my 07 gs450h and the only thing I was previously worried about was the water pump or power inverter.
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Old 08-30-18, 08:30 AM
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I didnt get that code but I just came to admire your mpg lol, wow. I'm from Ontario too and I've never gotten under 8L/100km. I drive normal and its 80% highway.
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Old 09-23-18, 11:06 AM
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if i was buying a used gs450h, is there a way to spot this issue besides lights and limp mode? anything under the hood i can spot? looks like where salt is used heavily like ontario it seems that this is a common problem
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Old 09-26-18, 02:19 AM
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Originally Posted by energie8 View Post
I didnt get that code but I just came to admire your mpg lol, wow. I'm from Ontario too and I've never gotten under 8L/100km. I drive normal and its 80% highway.
WOW that is over 28.3 mpg converted to english

Over 208k miles my car has averaged between 23-24 mpg 80% city.
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