Turbo actuator problem

[Jf81]

Hi all , I'm new to the forum and I am looking for help in pin pointing the current fault on my v8 diesel lc . The generic fault code I am getting is p00b0 , which suggest I have a fault in the no 2 turbo .
Any help on this issue would be great fully appreciated


Thanks

 

[fbnss]

Welcome. You're not being ignored just no one with an answer to help you yet!

 

[foto2021]

The mechanic who services my 120 LC3 (different engine, I know) managed to free off the actuator. He previously serviced a fleet of six Landcruiser 120s and freed off the actuators of three of them in a five year period.

 

[Shayne]

I'm not sure how it might help but i believe what your mechanic is talking about the the lever shown moving here at 30 seconds

 

[Mike McA]

I'm not sure how it might help but i believe what your mechanic is talking about the the lever shown moving here at 30 seconds

I'm a new poster,and rather than start a new thread,I thought I'd continue on this one.
My 2009 LC200 diesel occasionally goes into "limp mode",usually when it is hot from running for a while,and after some effort,finally got the code P0046,which Toyota tells me is Turbo Actuator.It took me 3 months and 3 Toyota dealers and almost $700 to get this scant piece of information from Toyota ,the problem being that if the car sits for a while,the code goes away,so by the time I am towed to the Toyota Service centre,the code has cleared.Grrr!
Toyota tells me it about $3600 for a new turbo,and 20 hours labour to fit it at $143 per hour.
Of course I could take it to a turbo specialist,which could be less expensive...not sure what to do here.

If anyone has any feed back on this matter I would be very grateful,because ,to be honest,I'm not sure Toyota know what it is.My sense is that it probably the correct diagnosis,after much research,but it's a lot of money to spend to find out that ain't the problem.

 

[Jf81]

After some time and and removing my so called faulty turbo , after inspection it was found to be in what I considered good condition so I refitted the turbo with out repeating it . I tried several Toyota dealers and they all told me it was the turbo at a Cost of 4000 . Long story I kept at it and found that my turbo controller/module was at fault with an intermittent fault , got one in. Scrap yard for 300 and I haven't looked back .

 

[StarCruiser]

Thanks for posting the solution @Jf81. It’s always good to post up the solution to a problem even if no one on here has the answer. It really helps others. Any chance of posting up some photos and sharing the part number and location of this turbo controller as again this will really help others if the same fault crops up. Well done for tracking it down too, some of these intermittent electrical faults are a nightmare to find.

Mike, Welcome to the forum. If you’re keen on doing a bit of maintenance yourself, there is a scan tool which uses Techstream software on a laptop and is very useful for Toyotas. Have a search on here for Techstream as there’s a thread with a link to the tool which is inexpensive. I’m with you on your thinking that Toyota don’t know exactly what the problem is and will just keep changing bits at your expense. I would say it’s either the actuator, the controller (if it’s the same as the 120 which is possible) or wiring or a connector. If you know which turbo it’s on then it’s worth having a look at the wiring and connectors around it. Look for any damage, any wiring touching down where it shouldn’t.

Enter your model number into Toyodiy and see if you can find a turbo controller on the parts list (better still if JF posts the part number) and you can then see if it’s the same as JF’s part which it could be. Wiggle wires to see if you can replicate the problem. It seems to be heat related by the looks of it. That’s a start.

Good luck with it.

 

[Shayne]

An 85 thousand dollar car probably officially classed as un- roadworthy because a tuppence worth of solder failed . Welcome to the future

 

[Mike McA]

An 85 thousand dollar car probably officially classed as un- roadworthy because a tuppence worth of solder failed . Welcome to the future

Thanks Jf 81 for your guiding words.Am determined to look at every option prior to replacing the Turbo.

When I picked the LC200 up from Toyota last week,they showed me a photo of an oil leak they had found,(not sure why they didn't offer to fix it)stating that it was either the rocket cover gasket or a rubber hose that had perished.Took the car to the local diesel mechanic in Ballina,where it appears a leaking Intercooler may be the cause of the oil leak.
Interestingly,one of the things P0046 code relates to is a leaky Intercooler.
Keep you posted.

 

[StarCruiser]

This could be down to split intake pipework. This sort of thing is quite common on many vehicles and can often be a cause of limp mode. Should be fairly easy to trace. Sometimes it can make a sound under heavy boost but can be difficult to hear above the engine. Can also be down to a loose hose clamp. I think you would be very unlucky to have a leak on the intercooler itself but of course this is possible if it’s suffered some damage.

Good luck with it, sounds like you’re getting closer. This is a lesson to all with engine management to use the codes wisely, not take them as gospel, but use them as a guide for the general area to look and interpret.

 

[Mike McA]

This could be down to split intake pipework. This sort of thing is quite common on many vehicles and can often be a cause of limp mode. Should be fairly easy to trace. Sometimes it can make a sound under heavy boost but can be difficult to hear above the engine. Can also be down to a loose hose clamp. I think you would be very unlucky to have a leak on the intercooler itself but of course this is possible if it’s suffered some damage.

Good luck with it, sounds like you’re getting closer. This is a lesson to all with engine management to use the codes wisely, not take them as gospel, but use them as a guide for the general area to look and interpret.

Picked up the car yesterday,and it appears it was the gasket on the intercooler manifold that was split and leaking,and one of the two bolts holding it onto the manifold had come loose.The last Toyota dealer to remove the intercooler had put the wrong bolt back,and a doggy gasket,so that was never going to work.
Degreased the area so will keep a close eye on it.
Also replaced the air filter with a genuine Toyota one.Dirty air filters(which it wasn't) also come up under the same code.
Thanks also Starcruiser for the info on Toyodiy.Will look into it.

 

[StarCruiser]

Glad you found it Mike and thanks for posting the evidence, fault codes and fix.

 

[IRLGW]

Do these turbos on the 200 have electronic actuators or vacuum operated actuators. If its a vacuum one then loss of airfow in the boost pipe will reduce the vacuum level and send the wrong info to the ecu. If its an electronic one I'm guessing that that it may still get airflow info via vacuum sensor but that the electronic actuator can also become faulty. Does Toyota not have a reliable car in the range these days...

 

[StarCruiser]

Do these turbos on the 200 have electronic actuators or vacuum operated actuators. If its a vacuum one then loss of airfow in the boost pipe will reduce the vacuum level and send the wrong info to the ecu. If its an electronic one I'm guessing that that it may still get airflow info via vacuum sensor but that the electronic actuator can also become faulty. Does Toyota not have a reliable car in the range these days...

I would imagine they are variable vane with electrical servo actuators. Seems in this case they were reliable Glen. Seems like it was the Toyota Main dealer that botched the refitting of the intercooler that was unreliable not the actual vehicle. I think if I were Mike I’d be a bit annoyed with the dealer that took the intercooler out and botched the refit and the dealer that misdiagnosed a faulty turbo at mega bucks to replace that would not have cured the problem unless they found the intercooler leak at the same time. If the two dealers were in fact one and the same I think I would be making a complaint to Toyota Japan about them. Best case, incompetent twice, worst case deliberately induced leak to get more business which would be almost impossible to prove of course.

 

[IRLGW]

I agree totally, the intercooler should never have been there in the first place..

 

[StarCruiser]

I agree totally, the intercooler should never have been there in the first place..

 

[IRLGW]

If they had stuck to KISS instead of KAIZEN there would be no un-necessary parts breaking un-necessarily?

 

[Mike McA]

Thanks guys for your optimism concerning having fixed the problem..but I haven't brought the lottery ticket yet.Soon I will load up a heavy trailer and find a steep hill and give it the boot.That will tell me a lot.In the mean time here are a couple of links concerning this code,should anyone else need it.
Thanks JF81 for your Turbo controller tip.
If need be,that is where i am heading next.

http://autoacademia.com/obd-2-codes/p004b/

https://www.yourmechanic.com/articl...noid-circuit-range-performance-by-john-nelson

 

[StarCruiser]

Good point Mike, not to count your chickens before they’ve hatched. The thing is you’ve found a ‘smoking gun’ and got it fixed. I’ve been in a Mercedes that exhibited the same problem (among many) so I’m pretty confident your problem is behind you.

Fingers crossed though.

 

[IRLGW]

Elementary my Dear Watson....you got to wonder if OBD is more of a hindrance than a help. We had a previa with that code and symptoms. was actually the vane ring sticking in the turbo. Running Techstream is a big help for Toyotas.
I would also strongly advise anyone who has OBDII for personal use to take snapshots of the engine when its running healthy. This is a big help when it comes to fault finding so you can reference back to figures from both idle, and load conditions. For example I thought there was a problem with the TPS as the base level was 17% but could not find data anywhere on what it should rest at and likewise with the fuel-rail pressure. If you have a suspicion then you can more readily find it.