O2 Sensor Help

[jason0865]

My 93 GS300 has check Engine light on for the 2nd time in 3 months after the Front Right O2 sensor (closes to headlight) was replaced. Please help me:

1. Code 28. Which is the "Main Heated O2 Sensor Circuit" error code. Is this the one that is located after the catalytic converter? I was told by the shop (not dealer) that the rear one is faulty. Could it be a simple sensor defect or other intake issues?

2. For you gentlemen who are able to read the error codes, do you actually have the code reader/scanner?

3. If I don't replace the O2 sensor soon, will it bring me a bigger problem?

A car shop quoted me $275 to get it done. But the dealer told me the sub sensor is even easier to replace than the front ones.

4. Will disconnecting the batter make the Check Engine light go away?

Please help! Thank you all so much.

jason0865@yahoo.com

[SKperformance]

I thought the heated one was before the cat

I have a scanner but it is obd 2 not one like your cars

If you run too rich too long you can burn up your cats and get horrible fuel economy

the light will go waway with no power but it fixes nothing

you might as well put a peice of black tape over the dash light, so you don;t see it

[jason0865]

Thanks SKP!!

U are right...I do have a "obd 1" on my 93....:"(

BTW, are those scanners expensive?

Well...I guess that means I have to pay for the job rather than getting the part and do it myself? The sub O2 sensor, is it difficult to replace?

Thanks once again.

[SKperformance]

i don;t know how much an obd1 is but my obd 2 cost about 200

try ebay

[TurboGS300]

Each of the sensors are about $120! Repace them yourself they're not hard, unless they're really siezed in there! Disconecting the battery will reset the light , once you fix the problem!

[mariaz]

Each of the sensors are about $120! Repace them yourself they're not hard, unless they're really siezed in there! Disconecting the battery will reset the light , once you fix the problem!

Does anyone know which censor would be responsible for turning on the electric fan on the gs300 1993.

[SKperformance]

it isn't an o2 sensor

i think you need to take your car to a technition.

[jason0865]

Thanks TurboGS:

So does that mean all sensors are easily replacible? Even the sub-sensor

that comes after the Catalytic converter?

What is an alternative place to find the O2 sensors..I can't find it in Ebay...:"(

Plz Helpppppppppppppppp!!

Thanks.

[jason0865]

SK:

I have tried Ebay, but no luck in finding a code reader for Obd1 terminal...

Can u provide some places where I can get it?

thanks a lot.