isANDERSON

so, on sunday i took my car to my mechanic to get the water pump replaced. after replacing it, and driving the car around for a few minutes, the check vsc warning came on, along with the check engine light and the traction control light coming on as well (i dont remember which order they came on). we connected a code reader which told us the set of O2 sensors went out, the ones before the cats? i have no idea what happened, for them both to go out like that is very odd. is it maybe because he didnt disconnect the battery before he started unplugging harnesses and what not that it may have shorted something out? anything would help.

its a 2006 is350 btw. 110k miles.

excuse my terminology if i happened to refer to something wrong, im writing this a little late.

Gville350

iTrader: (10)

Sounds like some coolant could have been spilled on or around the header/O2 sensor area causing those error codes. I'd give the car a few heat cycles to burn off any spillage and then reset the car by disconnecting the battery for at least 20 mintues. Then see if it returns.

isANDERSON

will do! monday morning, i disconnected the battery, then discounted the computer part thats mounted on the front the motor, which is what was disconnected during the installation of the water pump. left unplugged for 20 minutes. connected the computer then the batter, still nothing. ill try again at the end of the week, maybe i everything didnt dry up in that short amount of time.

Gville350

iTrader: (10)

As soon as the CEL came up, did you notify the shop? What did they say?

isANDERSON

well, we took it around the block and thats when we noticed it, and thats when we attempted to disconnect the battery and restart the system the first time. and the work wasnt one at a shop, but i trust the guy's work 100%. hes been working on toyota/lexus since he was 18.

Gville350

iTrader: (10)

The water pump work wasn't started and completed all at one shop?

Sounds like quite the coincidence that TWO O2 sensors are throwing codes RIGHT AFTER they performed work on your car though.

programer0

check o2 via o2 b1 and b2 waveform that will help u

isANDERSON

no, it was! one shop. sorry if i confused you. and my thoughts exactly.

isANDERSON

sorry. im not quite sure what that is.