Forum Discussion

jbres's avatar
jbres
Explorer
Jan 15, 2014

Figuring out my check engine light...questions

Finally I had diagnosed why I cant get rid of my recent service light on my 2003 Chevrolet Tahoe with 121,000 miles.

I had a very good local shop diagnose that it is the "fuel tank pressure sensor" that is causing my service light to stay on. My sensor has failed. This sensor simply measures the pressure in my fuel tank to ensure no leaks.
Problem is its located on top of the fuel tank, so tank must be at least partially dropped to replaced the stupid $60 sensor.
Local shop estimates will cost $392 to replace with taxes out the door.
Anyone ever replaced this sensor themselves? Or know of an easier way to tackle it versus dropping the tank?
My Tahoe runs perfect so I am half tempted to ignore it.
Thanks!
Tow Vehicles
  • jbres's avatar
    jbres
    Explorer
    Jan 15, 2014
    yea unfort I tried replacing the gas tank cap first and that didn't fix it. But luckily, no emission things anymore in ohio. I am dreading dropping the tank myself, may just bite the bullet and pay the shop to do it.
  • rhagfo's avatar
    rhagfo
    Explorer III
    Jan 15, 2014
    Bob/Olallawa wrote:
    I guess you could cut a hole in the floor but other than dropping the tank I don't think so. 400 bucks to replace the sensor isn't too bad a price if you can't do it yourself. If you decide to just let the light stay on you won't know if another problem jumps up.


    X2, and if in an emission area will not pass smog test.
  • dodge_guy's avatar
    dodge_guy
    Explorer II
    Jan 15, 2014
    Yes that sensor is a very common failure on GM cars. It can be replaced on the trucks without dropping the tank, but you need to know how to take them out. I've done many and can do them on a lift in 10 minutes.
  • Bob_Olallawa's avatar
    Bob_Olallawa
    Explorer
    Jan 15, 2014
    I guess you could cut a hole in the floor but other than dropping the tank I don't think so. 400 bucks to replace the sensor isn't too bad a price if you can't do it yourself. If you decide to just let the light stay on you won't know if another problem jumps up.
  • BTPO1's avatar
    BTPO1
    Explorer
    Jan 15, 2014
    I don't have a Tahoe, but some vehicles have an access cover over the sending unit. Might be worth looking to see if there is one there. Also agree with the previous response, might be a gas cap that the seal has gone bad. JMO
  • sch911's avatar
    sch911
    Explorer
    Jan 15, 2014
    A leaky gas cap can cause this DTC also. Are you sure it's not that?

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