Guys I need some help with the wifes 2007 Tundra. Friday night she started it up and the DSC and Check Engine light came on. We made it home but power was way down and shift points real high. She drove it the 2 miles to work and 2 miles back today, and the symptoms are the same. Any Ideas? Will an OBD II reader work on this truck?
Could be a whole host of things. Most readers will get you the basic codes. Not 100% sure if an old one will read the new CAN code systems, but I believe they will. Won't hurt to try it and see.
Sounds as if it went into limp home mode. The reader should point you in the right direction.
Most autoparts stores will read the codes for free (to try to sell you something). Or, if you can limp it in to Fayetteville, I'll plug my HF reader into it and we can see what it says. It's the new, super de-lux HF reader, and I think it does the CAN stuff or whatever the latest standard is. But, yeah, sounds like Limp Home mode to me too.
Last Oct, my LS400 went into Limp Home Mode just as I got to pavement heading to Texas to learn me some Essbase. It's throttle by wire too, but at about half throttle, the butterfly will open by cable. I managed to limp it on back to the house and had to take the Rolla instead. Code reader said something about position sensors, blah blah. I noticed that the throttle cable was a bit loose/slack and I tightened that up some and cleared out the codes and it's been fine since.
In reply to Dr. Hess: Thanks Doc! Electronics are my Achilies heal, basic wiring I can do, but advanced stuff gives me hives
E-mailing my phone #
The wife is going to San Antonio for work, so I have a few days to fix the truck.
Look at all of the normal stuff that makes an engine run. Any wire connector that may have come adrift. Things like that.
It's running fine now
This is the second "episode" so I'll accept Dr. Hess's offer.
You didn't push the accelerator pedal did you? j/k couldn't resist
It's the weird electrons in the throttle control
I've had the throttle position sensor on my Dodge truck freak out before. The computer went into limp mode and I pulled over. Turned the ignition off and then restarted and it ran fine. I do not like throttle by wire but at least it (seems) to go into a limp mode instead of WFO.
Threw code P2442 2deg. air injection system switching valve stuck open, bank 2.
Sometimes I miss points and carburators. 
Sorry about my scribbled doctor writtin'. That should be: P2442 Secondary air injection ...
Why is it that architects and engineers have to take penmanship/calligraphy type classes, to clearly transfer information, and doctors don't?
4eyes wrote: Threw code P2442 secondary air injection system switching valve stuck open, bank 2.
That would make it run lean which is why it went in to "limp home" mode. That is an emissions system part that should still be covered under warranty.
Looks like it is a known problem, that Toyota is treating with benign neglect
http://www.toyotatundraforum.com/emergency-911-tundra-down/6950-i-think-im-right-place-now-4.html
4eyes wrote: Looks like it is a known problem, that Toyota is treating with benign neglect
And also saying it isn't covered under the emissions warranty. My B-I-L had the secondary air injection pump replaced on his Ford F-150 2 years and 20K miles after the main warranty expired. They covered it as part of the emissions system.
Great news, even though we have had our truck for over three years, and just over 50000 miles, our local dealership extended our coverage to 5 years 60000mi. So the $4000 that the twin air-pumps and valves cost is covered! No cost to us, nada, zilch.
The scan at the dealership showed only valves are bad so far, but the parts are at a 3-4 week backlog. So they assume the pumps will be damaged by exhaust backflow by the time the parts come in. So they are changing it all.
I don't know if our buying multiple vehicles from the same dealership, and having all our service done there on time, by the same service manager, had anything to do with it. Or if Toyota is being proactive about the problem instead of waiting on another class action suit. But this is the kind of service I have come to expect from them. I'm glad things haven't changed.
Still waiting on parts
If you have a Tundra or Sequoia, I suggest you be very proactive about this. Keep a code reader handy, and tell your dealership service manager the first time it throws a air pump or air valve code. Get on the list for parts, because they will be on back-order for a while. Toyota is making some good TV adds touting their dependability though.
It could be your catylictic converter
eeek i should read all the comments.
We finaly got a call last tuesday that our parts were in. Made an appt. for thursday and dropped it off. Got a driver for the day, and the Tundra has worked flawlessly since.
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