O2 Sensor Replacement Didnt Work

[Bwilliams]

I Own a 91 Ls400 with 132,000 miles. It's the best car I've ever had. I've had it for a year now and I bought it with 119k on it. I finally had the check engine light and trac off lights come on. I researched for days and the common answer was the 02 sensors or the catalytic converter. I took out all 4 sensors and the main ones were ok. The sub sensors however didnt read anything so i replaced them with 2 universal sensors. The sensors I used were 4 wire and the sub were only two wire but when I finished everythhing I checked the capacity on the ohm meter and it registered ok. Thinking everything was finally ok I drove off and the stupid lights came on again!!!!!! I don't see how the catalytic converter can cause the cpu to shut off the traction control. I need help!! Any Ideas?????

[jschunke]

Did you have the codes read? Some say Pep Boys

will do it for free.

[dcfish]

I Own a 91 Ls400 with 132,000 miles. It's the best car I've ever had. I've had it for a year now and I bought it with 119k on it. I finally had the check engine light and trac off lights come on. I researched for days and the common answer was the 02 sensors or the catalytic converter. I took out all 4 sensors and the main ones were ok. The sub sensors however didnt read anything so i replaced them with 2 universal sensors. The sensors I used were 4 wire and the sub were only two wire but when I finished everythhing I checked the capacity on the ohm meter and it registered ok. Thinking everything was finally ok I drove off and the stupid lights came on again!!!!!! I don't see how the catalytic converter can cause the cpu to shut off the traction control. I need help!! Any Ideas????? :wacko:

When it comes to sensors for our cars OEM is the only way to go.You probably thought you were saving some $$$ right? There are some things you don't take to chance and sensors are one of them.

[branshew]

The sub sensors however didnt read anything so i replaced them with 2 universal sensors. The sensors I used were 4 wire and the sub were only two wire

That's probably part of oyur problem.

You must use like for like AFAIK when replacing sensors. 2 wire should be replaced by 2 wire.

[Bwilliams]

I RAN the code before anything and i got 25. air/fuel ration lean. I guess the 4 to two wire may be where i went wrong but when i finished it read ok on the voltmeter. So i guess ill order sum two wires and see what happens

[monarch]

No one here can troubleshoot problems caused by or not solved by the use of aftermarket parts, including the people who talked you into using them.