What's up guys? On my way home from work my 2010 suddenly stopped accelerating and the service engine soon and traction control lights came on, the car wouldn't go any faster than 20 mph, I plugged in my scanner and got code P2135 ( Throttle/Pedal Position Sensor/Switch A/B voltage Correlation ) please tell me this has nothing to do with the CVT?

 

Could be a wiring or connection problem, as always, any work done around accelerator pedal, throttle body or intake? Was it raining? Or the sensor itself. Were you flooring your max lately?

 

Hi mahanddeem, non of the above, I never floor that car always just cruise slowly, I was in some stop and go traffic. Something's telling me it's my CVT..

 

It could very much be just your throttle position sensor / throttle body going bad. Nothing on a car is made to last forever. If not done yet, try disconnecting the battery then throttle body harness, reconnect them then do the throttle and idle air relearn procedures before proceeding. If nothing changes you'll have to back probe the throttle body harness with a DVOM (digital volt-ohm meter) and compare the voltage at the harness to the voltage read by the scan tool.

 

I'm wondering if this could also be an alternator going bad? My previous car 2005 Nissan Altima did this problem and it was the alternator going bad, It didn't trigger any codes just wouldn't accelerate or accelerated slow. I then tested the alternator and it was bad, After replacing it all was well.

 

+1
Fully charged automotive batteries should measure at 12.6 volts or above. When the engine is running, this measurement should be 13.7 to 14.7 volts.

 

Just went for a ride in it and now it's running perfect, the VDC light and traction control lights are off but the Check Engine soon is still on. I'm confused here and wonder if this was a one off thing or if it will occur again..

 

It will be back. It has nothing to do with anything you mentioned. It is your throttle body. Easy fix. https://www.ebay.com/itm/Fuel-Inject...ry!34652!US!-1

I deal with this code monthly. I stop, connect to my ECU with Torque app, jiggle the harness under the hood at the TB, clear the code with Torque, then drive til it happens again. I just haven't (read; lazy) had the time to do anything more about it yet. Happened to me twice in a row last night so I guess I should get on it lol

 

Thanks user1! So this in your opinion is definitely the Throttle body and not the accelerator pedal sensor? The code is showing it could possibly be either or.

 

Correct. And this is based on the fact that I have been dealing with this problem since my swap, and the issue persists after having first attempting to resolve it when I replaced my accelerator pedal with a brand new OEM pedal. $160 bucks down the drain on that one! At least I kept my old one, spare parts!

My rationale was that the swap motor (2014 with only 40k mi on it) in my old *** 5th gen car had a newer TB than the car had accelerator pedal, so I replaced the oldest part first. It's unfortunate that the TPS is integral with the TB. It would be nice if we could just replace a $3 dollar sensor module instead of the whole shebang.

 

Also, don't go aftermarket with the TB. The link I sent you IS OEM! The $615 Nissan stealerships want to charge you is criminal. The Hitachi unit is the OEM TB. Pop your hood and see for yourself, "Hitachi" is stamped in plain view right on top.

 

That's awesome user1 thank you! I appreciate the info very much! I'll skip the accelerator pedal sensor and go for the TB, How's the idle relearn for this you think there will be any issues?

 

I've cleared this code probably 30 times, replaced my pedal, unplugged the harness multiple times, pulled battery terminals I don't know how many times, replaced ECU's twice, and never once done an idle relearn. Runs like a dream.

 

I set my idle at 735 with NDSII whenever I unplugged my ECU, but I've still never done a relearn, either with NDSII or manually.

 

So I may be able to get away with just removing the old TB and plugging in the new one without doing the relearn?

 

Why would it? The computer is smarter than you give it credit for. It learns, it knows where things need to be, how to control the engine. A calculator still does math after you replace it's battery. I unplug mine occasionally and never had an issue. I think too many uninformed, inexperienced youngsters who couldn't tell you what the acronym "FSM" means spread too much fear on auto forums like this.

 

Thank you User1! I appreciate it man and I'll keep you posted on how things go.

 

Please do.

 

If you need to buy some time, download Torque and get a BAFX OBDII dongle. If this happens again and you're disabled, just scan and clear the code. But at an affordable $115 bux, a new TB is the ideal solution.

 

Good to know, Thanks man!

 

BAFX is good.
CVTz50 has a function of idle relearn in app.
A gem app if you ask me, ton of features, read ECU and TCM codes, reset codes, read CVT deterioration value, read transmission temp, adjust idle, idle relearn and adjust timing (up to +2 degrees)..... Best $5 spent on Google store.
it's a CONSULT in pocket.
Good luck MaximusN8, I hope the TB fixes your issue.
I'd say you need a new gasket for the TB from the dealer, when you slap on the new TB.

 

Does that link up with the BAFX OBDII Dongle?

 

It does. First time I disabled engine braking was with CVTZ50 and BAFX.
Make sure you get a true BAFX one, I slowly started not trusting everything online.

This
https://www.amazon.com/dp/B005NLQAHS/ref=cm_sw_r_other_apa_i_I7AnEbA0DK9EG

CVTz50
https://play.google.com/store/apps/details?id=com.cvtz50.cvtz50

OBDLink is also a "fancier" more expensive OBD dongle (faster for live data) and works with CVTz50 and Torque too.

 

Nice, I'm going to order the dongle and purchase both apps. User1 had some good info as well assisting on this. Today when I plugged in my wired OBDII scanner I had the code for the Throttle body and pedal sensor and another code for a solenoid which wasn't there yesterday when the TB code came up, I'm assuming this one triggered this morning. So I removed the engine cover and found a line very brittle coming from the first solenoid on the passenger side, I replaced that line and reset my codes. The car is running fine now but User1 is having the same issue and says it runs fine then goes into limp mode again at some point and triggers the TB code for him. So I'm going to replace the Throttle body.

 

If your scan tool shows you live data then look if your alternator is outputting at the correct specs but when the alternator is bad, the battery symbol illuminates on the dash. It did for mine. Changing it was a pain.

 

My scan tool is minimal it just shows me the code and possible causes, Yes I've heard that changing the alternator is no easy task. Did you replace yours yourself? I tested my alternator with my portable jumper pack it tells me if the battery is bad and I can test the alternator voltage while the car is running, my voltage is between 13 and 14 and it's optimal so the alternator isn't the problem. I'm leaning towards the TB, I'm going to see how things go this week.

 

Nice find. The program looks very CVT-centric, perfect for you 7th genners.

 

Yes, This is something I'm going to be getting along with torque. User1 Do you no longer have a 7th gen?

 

Missed to mention that it can turn engine braking off, first thing I did to my car, I'll be much more happy replacing brakes than searching for a reman tranny.

 

I hear ya on that for sure!

 

I never had a 7th gen. I have a 5th gen with a 2014 engine. I did the swap one year ago today. I have 15k mi on it so far. Runs like a dream.

 

Wow you pulled that off! That's awesome! And no issues to date besides that TB?

 

No, no problems. I have a bunch of build threads in the 5th gen section. I've been through and replaced/upgraded just about everything on this car.

 

That's awesome man, Did you do all or most of this work yourself?

 

Did everything myself in my driveway. Unlike most who do this swap, i retained all 7th gen accessories, rather than modifying the new engine to accept the old stuff. Myself and one other 4th gen swapper are the only ones i know of who've done it this way with the 2nd gen VQ.

 

Man that's fascinating! I wish I was a part of that project. Good job on that, You have pictures in the 5th gen section right? I want to check this out.

 

Yeah I have all kinds of stuff in 5th gen. The engine for this car was just the first project

 

Awesome!! I'm going to check it out in a bit. 😉