Yes 2:08AM Central Time. Just got finished changing my transmission oil and filter on my 06 Scion xB
1. Funny that the dipstick reads "Transmission Oil Does Not Need To Be Replaced," Yeah, whatever - my tranny oil was not red it was brown.
2.I need to mention that there is a forum on this website going over an tranny oil replacement calling for approx: 3 Quarts of Oil b/c that is all that could get out from the plug I followed those same instructions and ended up buying 4 Quarts to be on the "safe side," but to my surprise I emptied out 4 1/2 Quarts of Oil!!!!! That is a big difference from the previous thread. I am not sure if the other guy was running low on oil but 1 1/2 more quarts is a huge difference. So I wanted to give everyone who wants to diy a heads up.
3. My Box has the Check Engine, VSC, and Trac Lights on! (Very common it seems) It has been like that since I bought it 4 years ago. (60k miles later too). I have had 0, ZERO, NONE, NOTHING of problems. I read that the P0174 code is a transmission solenoid problem or it could be dirty transmission oil!!!
Despite what manufacturer's might say, there is NO SUCH THING as "lifetime fluid." Many Toyota models now have "sealed" transmissions with no drain plug and no dipstick, which I think is asinine. Brown or black ATF needs to come out, no question, and having no dipstick or drain plug in those in order to check or change it is a huge disservice.
se-r_dad is right that all transmissions need regular fluid changes. As a former second-gen Odyssey owner (traded in when the 4th transmission was giving up the ghost at 244k), I can appreciate his mechanic's recommendation to over-maintain the unit in his Pilot. The '11 Accord we replaced the Ody with gets 30k intervals for the ATF with fairly easy driving.
Toyota's automatics are pretty robust, so every 30-50k should be a good interval, depending on your driving and climate (harsh temperatures or temperature swings, mountains, lots of stop & go, etc. means a shorter interval). There's also the option of dropping the pan and replacing the filter, which can get clogged with debris over time.
P0174 is an emissions code, not transmission. Most transmission codes begin P07xx. The P0174 code *usually* appears on V6 and V8 engines, because it indicates a lean condition for the O2 sensor on bank 2, the side of the engine that doesn't have cylinder 1. Inline engines (like all Toyota 4s) have only bank of cylinders, and it's normally identified by the ECU as bank 1. P0171 and P0174 are often associated with intake leaks, so I'd start there. If you've had poor fuel economy, this could be the culprit - the intake leak adds more air beyond what the MAF reads, and causes the engine to run lean. The O2 sensor reads this and adds more fuel to compensate.