GreenStang

Hey all, so the car has been running great but today I went to leave the house and it wouldn't start it just turned over and over. Finally the car decides to start and I see the CEL is on. I check it with my code reader and it tells me it's the crank position sensor. I cleared the code and drove the car to my destination and home and it ran fine no problems what so ever and the CEL didn't ever come back on. What's going on? Help would be greatly appreciated!

double clutch

iTrader: (1)

Most likely need a new cks sensor or the harness leading to the sensor is damaged. A lot of times you will be able to start the car again after you let it sit for a little while so all the energy dissipates. This DOES NOT mean the problem is solved. You still need to replace that sensor. It will happen again. There are alot of threads out there on this if you search.

GreenStang

Thanks for the reply. It doesn't really make sense to me how letting it sit would let the energy dissipate resulting in it starting up and working fine? Could you or someone else elaborate on that more please? Also is there an aftermarket sensor that is superior to replace this with or should I replace it with a GM OEM part? Could someone provide me with a step by step (how to) on replacing this sensor please? Thanks!

Cameron

double clutch

iTrader: (1)

Like I said. If you search you will find threads. This took me 30 seconds

https://www.cobaltss.net/forums/prob...o-start-54807/

ItalianJoe1

iTrader: (10)

The senors do fail from time to time. There is no better option than the OEM sensor, the cheaper aftermarket ones fail much more often.

They usually fail intermittently, I had my car shut off while driving and then restart before it coasted to a stop, the next time it did it it wouldn't restart for about 5 minutes but then it fired right up and drove home. Third time, required a tow and wouldn't restart until the next day. Changed the CKP and no more problems.

GreenStang

Thanks for the replies. And DoubleClutch I've seen that link before but it failed to answer all of my questions thus leading me to create a thread of my own. I've yet to see a "how to" step by step write up on how to replace this sensor with all the details. Replacing the sensor from what I've read other places seems to be removing the starter and taking out one bolt that's holding the CPS on. Is this correct? The only thing I'm unsure about is I've seen people say something about having to do a relearn after this? If you do have to do a relearn then someone please explain how that is done. I ordered the sensor also btw on that link you provided DoubleClutch the GMPartsDirect website wants 17 dollars for the sensor and another 17 dollars for shipping I used the same part # provided in that link on a quick google search and found the same sensor (OEM GM Part) on Amazon for 27 dollars and free shipping for anyone that needs one in the future at a better price!

double clutch

iTrader: (1)

Yes you need to remove the starter. You just have to remove the electrical connector and the bolt that holds the sensor in. Then replace everything. Be sure to check the harness going to the sensor for any bare or fraying wire. You will need a crank relearn. This is done with a tech2 at the dealership in a few minutes. You can drive it there. Just stay out of boost.

GreenStang

I called my local Chevy dealer they said it would be about 100 bucks to replace this sensor for me. Does this seem like a fair price?

GreenStang

Bump

exninja

iTrader: (1)

It depends on how comfortable you are working on your car. It's probably a 1-2 hour job if you've never seen the underside of your car before. 30 minutes if you are familiar with removing the starter, including prep time. If you take the car to the dealer you don't have to do the work but it will still take a lot of time to drop the car off, wait, and get the car.

I tend to think of these sort of things as cost versus time. How much is my time worth?

double clutch

iTrader: (1)

Depends on how much they would charge you for a relearn. They might charge you an hours worth of labor for it. If its included in that quote then i would do that. If they are only going to charge you like $20 for a relearn then replace the sensor yourself.

GreenStang

I would have to wait about an hour or hour and a half on my car in the lobby so I wouldn't even be without my car. This dealer charges 40 dollars just for diagnosing an issue which I figured if I replaced the sensor myself then I'd have to take it to them and they'd "probably" charge 40 bucks minimum to do a re learn so hell for 60 bucks they can do all of it for me haha.

ItalianJoe1

iTrader: (10)

I've never removed the starter to replace it, if you know where it is and you feel for it, you can unbolt and pull it straight out and install the new one from the top, takes about 5 minutes.

On a stock LSJ you will have to move the intercooler filler bottle, just unbolt the bracket from the blower and push it off to the side, then you can put your hand down there and reach the CKP.

GreenStang

Well I got the CPS today in the mail and took the car up to the Chevy Dealer and got the sensor installed. Cost me 100 bucks for the labor which I didn't think was too bad. I have a question though what are the chances that this sensor goes bad again? Or is it usually good to go for good once you've replaced it? Just wanted some insight on this.

Thanks