i put a new oxygen sensor in because of a check engine light. now with the new one in, the car starts with no light, after about a minute the light comes on. then stays on for a little while and then goes out. it doesn't do this every time. what could cause it.

i put a new oxygen sensor in because of a check engine light. now with the new one in, the car starts with no light, after about a minute the light comes on. then stays on for a little while and then goes out. it doesn't do this every time. what could cause it.

 

where did you purchase the o2 sensor

 

nipper

at a local parts store.

at a local parts store.

 

 

well thats the first thing to question. Aftermarket sensors can be lazy, and it sounds like you may have a lazy ensor.

 

nipper

I'd interrogate the ECU (i.e., pull the codes) to see what it thinks is the problem.

 

Nick

I'd interrogate the ECU (i.e., pull the codes) to see what it thinks is the problem.

 

Nick

 

if this is a 90, its obdI. he cant see it in real time, and if the CEL goes out im not even sure if that is storing codes on a level where he can see it...

 

nipper

if this is a 90, its obdI. he cant see it in real time, and if the CEL goes out im not even sure if that is storing codes on a level where he can see it...

 

nipper

 

All you need to do to pull the codes is connect the black connectors under the dash, turn the key to on, and read the CEL flashes. It will cycle through all the previously stored codes. Legacy777 has a guide on his site that also lists all the codes.

 

If you have a laptop, you can also build a cable and use a scan tool vrg3 made, and read parameters/codes in real time.

i checked it a while ago. only one code(oxygen sensor). just now got around to changeing it. it doesn't come on every time, i drove it earlier today and no light.

do you have to do the battery dance to clear an old one like that?

no you can pull the ecu fuse and there is also a procedure to just clear the codes. They're both explained in the link I posted.

All you need to do to pull the codes is connect the black connectors under the dash, turn the key to on, and read the CEL flashes. It will cycle through all the previously stored codes. Legacy777 has a guide on his site that also lists all the codes.

 

If you have a laptop, you can also build a cable and use a scan tool vrg3 made, and read parameters/codes in real time.

 

never said he couldnt read the codes, i said i wasnt sure if it would store a code like this since it goes away.

i have to get that software

If he doesnt have a laptop he wont be able to see realtime

 

 

 

nipper

it is a borg warner sensor

If you have a laptop, you can also build a cable and use a scan tool vrg3 made, and read parameters/codes in real time.

 

awesom, now i just need to buy a gen 1 suby so i can use this stuff.

 

do they make it for gen 2 ????????

 

john

awesom, now i just need to buy a gen 1 suby so i can use this stuff.

 

do they make it for gen 2 ????????

 

john

Yeah, just get an OBDII reader. They're far more common.

i just got another sensor, this time from subaru. i put it in and started the car and the light is still on. does it take some time for the car to realize that theirs a new one there? what else could it be.

in my haynes manual it says their should be 30 ohms between pins 1 &2. i got 6.1 ohms

^

[1 2]

[3 4]

i also checked my other sensor and got the same. then it says to check pin 2 on the engine wiring and i got .017v. i also got 12v on pin 1

 

ok just checked my other subaru and got 10.1 ohms between 1&2. but i was thinking that can't be the problem because the sensor that i took out had about 10. ohms.