Service engine soon light flashing when going up hill or highway

Asked by Jul 26, 2015 at 10:02 PM about the 2003 Chevrolet S-10 3 Dr LS Extended Cab SB

Question type: Maintenance & Repair

my 4.3 v6 4x4 runs fine around town,
or in any slow conditions really. But
when I climb a steep hill and try to
go 55 my light comes on and I lose
some power, give or take a minute it
clears up and runs fine like nothing
happened and light turns off. Need
help on this have no clue what it
could be, I have cleaned my mass air
flow, changed plugs and wires, just
did a fuel pump and new fuel filter
and still acting up.

2 Answers

94,965

As the light was flashing it should have set a code in the memory, so get the codes checked, write them down and then repost them back here and someone will jump in and help you with further diagnosis, most parts stores will do this for free. I have an idea that it maybe an O2 sensor.

1 of 1 people found this helpful.
47,665

Have the catalytic converter(s) checked to see if it is plugged up. With a severely plugged converter you will have a big loss of power. Sometimes you won't get 55 mph out of it.

Your Answer

Add photo

Related Questions

  • Service engine soon light flashing when going up hill or highway 2 answers

    my 4.3 v6 4x4 runs fine around town, or in any slow conditions really. But when I climb a steep hill and try to go 55 my light comes on and I lose some power, give or take a minute it clears up a...

    2003 Chevrolet S-10 3 Dr LS Extended Cab SB

    -

    Maintenance & Repair

  • Flashing Service engine light 1 answer

    OK my light is on from what the scanner at auto zone says its evap problem(purging during non a non purge or faulty vent silinoid) but that's not why I'm here. When i take off from a dead stop the tru...

    2003 Chevrolet S-10 4 Dr LS 4WD Crew Cab SB

    -

    Maintenance & Repair

  • Service engine soon. Dash light 5 answers

    Service engine soon dash light is on BUT sporadically will go out for aday or two. How do I reset it ,or is this a warning that may require professional help??

    2003 Chevrolet S-10

    -

    Maintenance & Repair

  • What are possible causes for service engine soon light? 5 answers

    Service engine soon light is on. Why?

    1997 Chevrolet S-10

    -

    Maintenance & Repair

  • how do I reset service engine soon light? 1 answer

    Was within 200 miles of oil change. got oil changed but light still on.

    2002 Chevrolet S-10 3 Dr LS 4WD Extended Cab SB

    -

    Maintenance & Repair

Search Chevrolet S-10 Questions

Chevrolet S-10 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 2,340
#2 Trebor66
Trebor66
Reputation 990
#3 John Saffrahn
John Saffrahn
Reputation 980
View All

Related Models For Sale

Used Ford Ranger
176 Great Deals out of 5,676 listings starting at $950
Used Chevrolet Silverado 1500
1,765 Great Deals out of 181,201 listings starting at $250
Used Chevrolet Colorado
242 Great Deals out of 24,818 listings starting at $2,499
Used Toyota Tacoma
472 Great Deals out of 41,590 listings starting at $1,995
Used Ford F-150
2,059 Great Deals out of 207,339 listings starting at $1,499
Used GMC Sonoma
5 Great Deals out of 453 listings starting at $2,798
Used Dodge Dakota
137 Great Deals out of 3,796 listings starting at $1,495
Used Nissan Frontier
291 Great Deals out of 23,780 listings starting at $1,995
Used Dodge Ram 1500
410 Great Deals out of 10,833 listings starting at $1,400
Used Chevrolet Blazer
3 Great Deals out of 1,188 listings starting at $1,820
Used GMC Sierra 1500
760 Great Deals out of 69,126 listings starting at $1,850
Used GMC Canyon
81 Great Deals out of 10,547 listings starting at $2,495
Used Chevrolet Camaro
243 Great Deals out of 31,194 listings starting at $369
Used Toyota Tundra
438 Great Deals out of 34,677 listings starting at $2,990

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.