Engine error code says the HO2 sensor on the passenger side exhaust (rear sensor) has a low voltage reading.....looked at the replacement procedure in the Helm's manual, and it's pretty straight forward...just wondered if anybody had replaced one on their Corvette and had any tips/tricks to pass along.....

 

It really is as straight forward as it looks. The only thing I had to do extra on my L98 was to cut the lead on the new O2 sensor and crimp the connector.

 

I did this on my '94, and the sensor that you are talking about was the only one that I wasnt able to get to. I couldnt get any tools up there to loosen it up, and even if I would've gotten it out, it didnt look like I wouldve been able to get my hands up there to plug the new one in. It basically looked like it was impossible for me to do without lowering the exaust, so I had a local shop change it out for me. It wouldnt take much to jack your car up, to see if you can get to it easily or not.

 

the Helm's service manual suggested lowering the exhaust to get to the sensor also....may have to take it to a shop as i'm not equipped for raising/lowering the vehicle....thanx!

 

I did both of mine just a few weeks ago. A normal 3/8" rachet and a O2 sensor socket makes easy work of it. I got the socket from the local auto parts store.

The trick on the passenger side one, to loosen put the socket on the sensor then bring the rachet into the are and attach it. You have just enough room to break it free. Torque, 42Nm 31 Ft/lbs.

 

I think you got lucky and your car only has two O2 sensors, either that or you missed changing the one that he is talking about. Its further down the exhaust pipe on the passenger side, just follow the pipe back and you'll find it, that is if your car has three.

 

Neither lucky nor three. A 1993 has just two O2 sensors, left bank and right bank.

Well let's see, I drove it up on the ramps. Disconnected the battery, crawled underneath and did the driver's side first. That one just takes a few minutes, disconnect the electrical connector, put the socket on the sensor and loosened it. Installation was the reverse. Then I slid over to the passenger side, disconnected the electrical connecction and studied it for about 5 minutes trying different angles until I realized to take the socket and insert it on the O2 sensor, then coming in from the back side of the sensor and Cat, I handed my left hand the racket from my right hand since I had to push it up in there with my right hand from the backside. Once I had the rachet in my left hand I used my right hand finger to assist getting the rachet pressed into the socket. With just enough room to break it free, I removed the rachet and loosen it the rest of the way using just the socket and my fingers. Installation was the reverse. If I remember correctly I could not get the torque wrench on it from underneath but if you come down from the engine side you can get the torque wrench on the socket that is already on the sensor. Just enough room to get the torque. Reconnected the electrical connector.

The driver's side was easy to get access with a torque wrench.

It probably would have been even easier if I had it up on a lift instead of laying on my back. Either way it did not take me that long and this was the first set of O2's I've ever changed. So for a newbie I'd say 15-20 minute job.

 

Um, thats what I said "You were lucky that your car has only two", but anyway LT1SPUD said in his original post that it was the passenger side (REAR sensor), that most likely means he has a sensor up front on the passenger side (the one you had to change), and the one further back (I think this is the one he is having trouble with, since he stated REAR sensor), therefore your info isnt really helping him. Im not trying to be ignorant, I just want LT1SPUD to understand that his task isnt going to be as easy as yours was.

 

you can go to auto zone and they have a o2 sensor ratchet kit that you can use they iether let you use it or you may have to rent it but i just did mine on my 96 and i wish i knew that then..you may need to let the exhaust get hot to bkeak them loose and be careful i have the scars on my arm to back that up....o i got the same codes on mine and found out tit was only a blown fuse....

 

Kewl, guess I am lucky then. Thanks.

Good luck with the repair.

 

rlt96vette: how did you find it was a blown fuse? after replacing the sensors and then still getting a "service engine soon" alarm?

 

i had had some work done at the local dealer (never ever do that again)adn thats when i started getting the alarm nto wanting to take it back i replaced all four and still got the alarm so i got so mad i took it back and with a few choice words they found it was a blown fuse yours may not be but i would check see they replaced the intake and valve cover gaskets and a o rong on the trany and all new fliuds and some where it blew a fuse???they arent that hard to take out and put back in but plugging them up is apita...hey i noticed your from decatur al.we are from scottsboro al.currently living in dickson tn. for the last 20 yrs but all the family is still there