stft at99.2%,p0300 code,changed 2 after cat sencers checked for air leaks-none,checked fuel pressure,new pluges&wires,both cats are hotter on outputs

Asked by Jan 20, 2015 at 01:08 PM about the Chevrolet Silverado 2500HD

Question type: Maintenance & Repair

code only comes on while on the move-off atslow or stop.changed maf,plugs&wires,b1-s2&b2-s2 have been changed.looked for air leaks atpcv...cleaned throttle

3 Answers

2,625

Did you Check Compression. Checked for Shorted or Opened Circuits on your Fuel System and Ignition System.

2,625

Make sure you run some fuel injector cleaner just in case the injectors are clogged!

found ground green-cut off end replaced end;then added an extra one. tomarrow will tell more.

Your Answer

Silverado 2500HD

Looking for a Used Silverado 2500HD in your area?

CarGurus has 30,661 nationwide Silverado 2500HD listings starting at $2,995.

ZIP:

Chevrolet Silverado 2500HD Experts

  • #1
    Steven Loeffler
    Reputation
    500
  • #2
    Tom Demyan
    Reputation
    320
  • #3
    piocon
    Reputation
    300
View All

Related Models For Sale

Used GMC Sierra 2500HD
109 Great Deals out of 14,261 listings starting at $2,799
Used Ford F-250 Super Duty
405 Great Deals out of 49,117 listings starting at $1,899
Used Chevrolet Silverado 1500
2,698 Great Deals out of 174,506 listings starting at $955
Used Dodge Ram 2500
158 Great Deals out of 5,454 listings starting at $2,661
Used Chevrolet Silverado 3500HD
142 Great Deals out of 11,321 listings starting at $7,995
Used Ram 2500
180 Great Deals out of 35,129 listings starting at $6,995
Used GMC Sierra 1500
1,196 Great Deals out of 64,603 listings starting at $999
Used Ford F-350 Super Duty
379 Great Deals out of 27,060 listings starting at $2,995
Used Ford F-150
3,322 Great Deals out of 221,765 listings starting at $1,200
Used GMC Sierra 3500HD
69 Great Deals out of 4,800 listings starting at $10,995
Used Chevrolet Silverado Classic 2500HD
31 Great Deals out of 402 listings starting at $5,995
Used GMC Sierra 2500HD Classic
6 Great Deals out of 181 listings starting at $5,250
Used Chevrolet Silverado 2500
10 Great Deals out of 236 listings starting at $3,995
Used Dodge Ram 3500
89 Great Deals out of 2,296 listings starting at $5,999
Used Chevrolet Silverado 1500HD
7 Great Deals out of 279 listings starting at $3,900

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.