Truong714

Hi forum, I think screwed up my wife 2011 Lexus ES 350 at 160,000. I did tranny flush at 100K but I decide to drop the pan and also flushed the tranny at 160K. I add way too much WS fluid when filling it back from the hole. I warmed the car up but did not have IR thermo like I did last time at 100K. I used 2 bottle every time I flush out the old fluid and poured the same amount back when I dropped the pan the changed the filter. I used total 14 bottle at $9 per bottle. When I was filling it to the last bottle, some fluid was tricking out of the filler hole but I think I was not at the correct temp, it was colder than 104 degree F. My wife text me a pic with smoking from the engine bay when was she dropping off my daughter about 5 miles from where we live. BUT i said it was probably from the oil I spilled way doing the flush so I decide to let her driver to work 50 miles away. Anyway, after 8 hours of being parked, the car threw codes on the dash board , engine check and traction control , a random friendly mechanic in front of Autozone pulled the code 0174 (BANK TWO SYSTEM TOO LEAN). He cleared the code and told her that it was ok to drive home. She drove another 50 miles back home, she was telling me that it was smoking a lot on the freeway. Upon visual inspection, I saw fresh WS spray on the firewall, into the exhaust at the bottom of the tranny where it is attached to the engine. MY question is : Could I have blown the gasket between the trannsmission and the engine? The engine check light and traction control are still there right now. Could I have ruined the transmission by over filling it? Is there a overflow valve for the transmission to prevent over pressure due to over filling of ATF?

thank you very much

ESh

bucfan22

your bigger problem is finding where is/are the ws fluid leaking from and fix that before too late.

Truong714

My friend is a mechanic told me that I might need to change out/replace Air to Fuel ration sensor and MAF sensor. Code P0113, P0174, P0102 and P2197
He told me that I overfilled by 3 quarts. I didn't bring up to 104 F. This is so bad. I hope I didn't cause a gasket leak due to overfilling and hence over pressurized the transmission. He will show me later.

Truong714

Can someone here post me links to fix those code? Or at least find a cheap way to fix them 4 Oxygen sensor and MAF sensor thanks

ESh

Maybe you just need to clean the connector.

Truong714

I will take the car back today and see if you can clean those connectors! thank you

jagtoes

At this point I won't trust your mechanic friend. It sounds like all of these codes came up after the smoking started so logic says that someone needs to see where the transmission fluid came out and how it damaged these components. Don't throw money at it go to a reputable dealer or mechanic. Let them diagnose the problem and tell you what they think is wrong and how much to fix.

Truong714

Ok, He replaced my Bank 2 Oxygen sensor #1 (the one in the toward the front of the car is bad, there is another #2 down toward the ground but it is still good) he also replaced the MAF sensor in top the airbox. Bank 1 Oxygen sensors toward the firewall are good. Both faulty sensors were replaced from from a crashed Lexus from his friend at the local body shop. He test drove about 50 miles for without any problems. I just drove it for another 40 miles without any problem and no codes appear on dashboard yet. He told me and showed me on the scanner that the car is pending then clearing the code after about 100 miles of driving. Scanner are really high tech for home mechanic (will get one for myself soon). Anyway, I'm happy right now because I thought I did major damage to the transmission since I overfilled it but someone here mention there is a overflow tube in the transmission to prevent over pressuring the sealed transmission on 11 Lexus ES 350. Both labor and parts costed me about two bills but hey i'm very happy right now with your inputs guys. I'm a decent home mechanic myself. I replaced the water pump, all the pulleys and alternator pulleys ( was recommended while i'm at it on this forum) for the same car at 100K and no leaks so far after 60,000 miles later. I replaced control arm, pushed out the rubber bushing donut thingy to push in the new one, pushed out ball joints, changed inner and outer rods, did my own wheel alignment. This time I was just careless about not measuring the temp while filling the WS fluid, didn't take fluid expansion into account once it heated up. Thank you for your input guys.

Clutchless

This kit on eBay has been used by someone on the RX forum (same transmission) the guy figured how high the overflow tube should be to do the overflow test at normal operating temperature as opposed to the low temp range Toyota uses with their tube. Anyway, I thought it was interesting for $75 https://www.ebay.com/itm/Toyota-Lexus-Sealed-Transmission-Fluid-Replacement-Kit/222731930378?epid=23010345970&hash=item33dbdb8b0a:g:AFkAAOSw8b1aGFbV&vxp=mtr

bucfan22

You only change transmission fluid probably once or twice at the most during the life of the car that you owe, the cost of buying this stuffs defeat the purpose of saving that most of the DIYers trying to take care of their cars.