What’s up with this

Asked by Robert Aug 06, 2020 at 02:02 PM about the 2002 GMC Yukon XL 1500 SLE 4WD

Question type: Maintenance & Repair

Ok so I have a 02 yukon xl 5.3. The
cam shaft sensor has read low
voltage code so it’s been gone thru
literally everything has been tested
out sensor is good the sensor wheel
seems to be working right there is no
breakage or resistance in wiring.
Was even told to
Replace ecm I did dealer did that but
that ecm has never worked right they
wanted to reprogram said it didn’t
take but was gonna charge me again
not happening I put old ecm in
works fine drive all day long no
codes turn it off  then when you
restart a min later or even next day
code thrown again battery tested ok
but I’ve seen battery’s test out and
still have a dead cell could that be
the problem sick of dealing with
shops sick of dealing with same
issue for months not getting
anywhere

1 Answer

26,640

Did you check ref voltage at sensor--12 volts,red wire-- key on. you can use digital multimeter to check.The signal wire--brown wire, the voltage should switch between 12 volts and zero as the crank is slowly turned. the pink wire says lo reference, which i call ground. Usually if the cam sensor is involved, I check the crank sensor also. Just my opinion.

Your Answer:

Yukon XL

Looking for a Used Yukon XL in your area?

CarGurus has 725 nationwide Yukon XL listings starting at $1,000.

Postal Code:

CarGurus Experts

  • #1
    MikeDaGeek
    Reputation
    4,510
  • #2
    Rowefast
    Reputation
    840
  • #3
    Gene Arnett
    Reputation
    760
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Suburban
16 Great Deals out of 511 listings starting at $11,950
Used GMC Yukon
17 Great Deals out of 941 listings starting at $5,998
Used Cadillac Escalade ESV
5 Great Deals out of 159 listings starting at $11,990
Used Chevrolet Tahoe
18 Great Deals out of 859 listings starting at $9,980
Used Ford Expedition
18 Great Deals out of 682 listings starting at $5,650
Used Cadillac Escalade
30 Great Deals out of 535 listings starting at $1,000
Used Lincoln Navigator
255 listings starting at $17,990
Used GMC Sierra 1500
182 Great Deals out of 9,044 listings starting at $1,000
Used Toyota Sequoia
4 Great Deals out of 49 listings starting at $12,950
Used Chevrolet Silverado 1500
222 Great Deals out of 9,112 listings starting at $2,900
Used GMC Sierra 2500HD
37 Great Deals out of 2,272 listings starting at $9,999
Used Ford F-150
363 Great Deals out of 12,802 listings starting at $599
Used Cadillac Escalade EXT
4 listings starting at $12,995
Used Chevrolet Silverado 2500HD
39 Great Deals out of 1,814 listings starting at $1,000
Used Ford F-250 Super Duty
31 Great Deals out of 720 listings starting at $4,290

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.