Check Engine Light - P0174, P0171, P0650, & C0281

Asked by Jul 18, 2016 at 06:57 PM about the 2004 Chevrolet Silverado 1500 Short Bed 2WD

Question type: Maintenance & Repair

My engine light came on yesterday so I bought a Innova obd2 reader and
got the following codes:
P0174, P0171, P0650, & C0281

After reading the codes I performed a MAF sensor cleaning with the MAF
Spray. The light turned off and then after a couple stops and an hour later it
came back on with the same codes some say freeze frame and or pending.
Where should I go from here? If it's the shop I just like to be educated
before showing up, if you know what I mean.

7 Answers

12,665

Fuel mixture codes. Check engine light code, and ABS code First things have the upstream HEGOS changed then rescan.The two main signals controlling air fuel mixture are MAF and HEGOS that's it so simple.. TPS is third and is more of an open loop PCM (computer map running signal %) of throttle opening...Congratulations you're the first person since I started answering questions... APRIL 2016.. THAT HAS PURCHASED A SCANNER ! THANKS, GIVES ME HOPE, " I just like to be educated" BRAVO,1 out of thousands! Regards

Thanks! Had no clue what HEGOS stand for but after some googling I found HEGOS = "Heated Exhaust Gas Oxygen Sensor". I'm debating on doing this myself (I'm gessing it's about $200 or more for a shop to do this) but I don't have a way of lifting the truck so might be a little more fun for me. I found this video that gives me a clue of what to do: https://www.youtube.com/watch?v=aXu463XT8lk Looks like this is the part and best pricing I could find with fast shipping, I think I need two: https://www.amazon.com/Bosch-15895-Oxygen-Sensor-Fitment/dp/B004AGCC1K

12,665

Confirm (2) Bosch 15895 Oxygen Sensor part numbers, 4 wire sensors are the heated design. (HEGO) The A1 video is a good example of the install. Yes, a shop will charge approx $300 there are 2. that's labor only!

18,815

Make sure you have no vacuum leaks or air entering after the maf on the intake plenum. Popular places to leak are brake booster line and connection same for the pcv. Checking fuel pressure wouldn't be a bad idea.

Auto_Centric - I'm not sure but are the Bosch 15895 the same for up and down streams? I keep seeing the same part number used for both. Andrew - I'll give that a check, I actually have a tester on hand!

12,665

Yes, all listed as 15895's Up and Down steam , keep in mind the down stream's only monitor Catalytic Converter temps based on oxygen content ...they have NO active control on any system! The concept of heating an 02 sensor simply brings it online faster then just the exhaust gas temperature. Trivia a couple manufactures, Bosch and Denso supply the major of 02 sensors to the entire automotive industry.

Parts finally made it in, and the check engine light turned off over the weekend. I'm assuming it would still be best to replace the part either way.

Your Answer

Add photo

Related Questions

  • Check Engine Light - P0174, P0171, P0650, & C0281 7 answers

    My engine light came on yesterday so I bought a Innova obd2 reader and got the following codes: P0174, P0171, P0650, & C0281 After reading the codes I performed a MAF sensor cleaning with the MAF S...

    2004 Chevrolet Silverado 1500 Short Bed 2WD

    -

    Maintenance & Repair

  • check engine light 3 answers

    should my check engine light come on briefly when I start my truck then go off? I don't see it come on at all. Just wondering if I need to replace it, not sure how to replace it either.

    2000 Chevrolet Silverado 1500 Reg Cab Short Bed 4WD

    -

    Maintenance & Repair

  • check engine light staying 2 answers

    dmorin29 answered about a second ago i have a 2004 silverado and the check engine light came on went to autozone and they scanned it came up o2 sensor replaced it.but service engine light still on d...

    2004 Chevrolet Silverado 1500 Short Bed 4WD

    -

    Maintenance & Repair

  • 02chevy silverado flashing check engine light 11 answers

    I just reaplaced the rear main seal and now my check engine light is flaking and I am hearing a strange tapping sound any ideas?

    2002 Chevrolet Silverado 1500 Ext Cab Short Bed 4WD

    -

    Maintenance & Repair

  • check engine light 1 answer

    check engine light is on.onstar said it was a fuel problem anyone know about this.

    Chevrolet Silverado 1500

    -

    Maintenance & Repair

Silverado 1500

Looking for a Used Silverado 1500 in your area?

CarGurus has 183,623 nationwide Silverado 1500 listings starting at $1,595.

ZIP:

Search Chevrolet Silverado 1500 Questions

Chevrolet Silverado 1500 Experts

#1 John Carson
John Carson
Reputation 2,440
#2 Rowefast
Rowefast
Reputation 1,950
#3 tenspeed
tenspeed
Reputation 1,650
View All

Related Models For Sale

Used GMC Sierra 1500
805 Great Deals out of 68,323 listings starting at $1,300
Used Ford F-150
2,133 Great Deals out of 191,033 listings starting at $290
Used Dodge Ram 1500
410 Great Deals out of 10,898 listings starting at $1,000
Used Chevrolet Silverado 2500HD
309 Great Deals out of 28,856 listings starting at $1,500
Used Toyota Tundra
470 Great Deals out of 34,457 listings starting at $1,950
Used Toyota Tacoma
571 Great Deals out of 42,598 listings starting at $1,995
Used Chevrolet Tahoe
586 Great Deals out of 33,585 listings starting at $1,375
Used Chevrolet Colorado
255 Great Deals out of 28,177 listings starting at $2,000
Used Ford F-250 Super Duty
337 Great Deals out of 43,837 listings starting at $1,450
Used Chevrolet Silverado 2500
9 Great Deals out of 256 listings starting at $3,495
Used Chevrolet Silverado 1500HD
10 Great Deals out of 288 listings starting at $3,995
Used Ford Mustang
725 Great Deals out of 44,323 listings starting at $1,500
Used Nissan Titan
179 Great Deals out of 18,998 listings starting at $3,745

Used Cars For Sale

2017 Chevrolet Silverado 1500 For Sale
285 Great Deals out of 125,126 listings starting at $20,549
2016 Chevrolet Silverado 1500 For Sale
152 Great Deals out of 5,760 listings starting at $17,900
2015 Chevrolet Silverado 1500 For Sale
245 Great Deals out of 8,545 listings starting at $12,950
2014 Chevrolet Silverado 1500 For Sale
268 Great Deals out of 10,367 listings starting at $9,798
2013 Chevrolet Silverado 1500 For Sale
167 Great Deals out of 5,010 listings starting at $7,994

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.