shafner30

hello

i have a 1990 22re 2wd with 395 thounsands miles ... no joke..

i have a ?

my o2 sensor check engine light has been coming on sometimes the last few weeks.. code 21

it only comes on when i jump on the freeway.

when i am going though the gears..

but i does not do it all the time...

the truck runs great ..no mpg decrease..

i am still getting 23 /24 miles per gallon.


please let me know what you guys think it is..


thanks

yodermotor

I love to hear that our toys are reaching that many miles, but unfortunatly with time and wear you never know what sensors could be bad, go through your whole truck and check all sensors. O2 would prolly be the best bet though.

highonpottery

iTrader: (1)

Yay Toyota! Thats a lot of miles. My dad had a 22re go 350k with only a clutch job - hopefully your experience was similar with minimal maintenance.

Sounds like it's time to replace the o2 sensors. Pretty minimal maintenance considering how many miles you've got on that thing. You might even improve fuel economy.

What kind of maintenance has your tuck required?

shafner30

also i get a little exhaust smell from tail pipe from start up when the engine been sitting for few hrs... does that help you guys..

t

offset442

do a compression test, and look for any cylinders that are way below 140 psi. I would suspect a leaking valve, especially if if idles kinda of ruff, and smooths out when you rev if up, and with an engine that old anything is possible. whatever the cause the engine is likely running to rich........start going through the motions

shafner30

its idles relly good..

the truck runs really good but the o2 sensor check engine light turns on..when i jump on freeway but not all the time..it does ping a little right before the check engine light turns on

4Crawler

iTrader: (3)

Could be a wiring or sensor issue:
- http://www.4crawler.com/4x4/CheapTri...es/index.shtml
check the wiring for cracking, melted insulation, etc. and if OK, consider a new Denso O2 sensor if the one you have is of unknown age.