i have a 92 Ls 400 and it is throwing code 25, i read up on it and it says air-fuel ratio lean malfunction........any ideas? thank you

 

I would first take a look at the cheap part...02 Sensor, it reads exhaust gas and tell the computer what to do. How did you pull the code?
Mark

 

you need the obd 2 reader to pull up codes. to the last time i remember haha. i wonder how people pull up codes too.

 

1990-1994 LS400's are OBD-I, so no code reader is necessary. Codes can be read by shorting pins TE1 and E1 in the DLC2 connector, turning the key to 'ON' in the ignition, and counting the number of time the MIL flashes. A short pause between flashes indicates that the MIL is showing the 2nd digit of the code. For example, *FLASH* *FLASH* [PAUSE] *FLASH* *FLASH* *FLASH* would indicate code 23. There will be a longer pause after the code sequence and the code will repeat until you turn the key back to the off position.

 

That is the same as standard toyota, I thought this would still be OBD-1, Very nice, just for information is there a good site for the code definitions?
Thank you.
Mark

 

not the LS exactly but should be pretty much the same stuff.
http://us.lexusownersclub.com/forums...howtopic=37260

 

first of all thanks for the replies, it was in fact an 02 sensor.......i tried to post a pic of my car but after i uploaded it nothing posted?????

 

Thats great,
It is nice when things go right.
Have a great day.
Mark

 

Did you replace all 4, or narrow it down to one?

 

i have now replaced 3 of the 4, this one threw a code 25 which was not an 02 sensor code, it ended up to be bank 1 sensor 1, i have one left to replace but will wait for the cel to come on