non-continuous flashing service engine light

Asked by GuruHCC2G Jul 17, 2019 at 09:41 AM about the 2003 Chevrolet Trailblazer LS RWD

Question type: Maintenance & Repair

For about a month my engine has been running hot when stopped at a light,
but cools down to 210 after moving on.  Now my service light is flashing
intermittently and it starts choking down at a stop, and is running rough while
in park.  I just put gas in yesterday, drove it around a lot, it ran great this
morning for about 4 miles in light traffic, then the light starts flashing.  Goes
off when not accelerating.  

1 Answer
11,575

FJ4072 answered 5 years ago

Sounds like 2 different issues, heating and rough idle. Catch the check engine light on a scanner, likely it's a misfire, bad to drive it while flashing. You'll probably find a bad coil. Once you find out which cyliinder is missing, swap the coil with another cylinder. Drive around, and try and catch the code again. Bet it will follow cylinders. May need a new coil there. As far as overheating, again, use a scanner to check real temperature, our gauges are not good at all. Could be anything from a bad temp gauge, stat, fan clutch, waterpump.

Mark helpful

Your Answer:

Related Questions

  • non-continuous flashing service engine light 1 Answer

    For about a month my engine has been running hot when stopped at a light, but cools down to 210 after moving on. Now my service light is flashing intermittently and it starts choking down at a stop...

    2003 Chevrolet Trailblazer LS RWD

    -

    Maintenance & Repair

  • Engine light flashing 1 Answer

    Engine light comes on and now it's flashing on and off, when I hit the gas it hesitates like doesn't want to pick up speed.

    2007 Chevrolet Trailblazer LT 4WD

    -

    Maintenance & Repair

  • Flashing check engine light. 7 Answers

    While driving on the road, I look at the instrument panel and the check engine light is flashing and then the cruise doesn't work. Although it stops flashing, it will happen again. Do you have any sug...

    2004 Chevrolet Trailblazer LS 4WD

    -

    Maintenance & Repair

  • Check engine light flashing 3 Answers

    Fi ed om thermostats and O2 sensor due to codes thrown when my check engine light was on. Before the fix car tan cold and would stall if you put it into drive to quickly. Right after the fix in my ...

    2003 Chevrolet Trailblazer LT 4WD

    -

    Maintenance & Repair

  • Flashing engine light 10 Answers

    I have a flashing engine light that comes on when the motor is under any kind of strain. I've scanned it and it's reading P0300. Multiple cylinder misfire. I've replaced the plugs and it still exis...

    2005 Chevrolet Trailblazer LT 4WD

    -

    Maintenance & Repair

Shortcuts

Search Chevrolet Trailblazer Questions

CarGurus Experts

  • #1
    FJ4072
    Reputation
    7,690
  • #2
    Gene Arnett
    Reputation
    3,180
  • #3
    bigdogracer
    Reputation
    2,760
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Blazer
19 Great Deals out of 872 listings starting at $19,499
Used Chevrolet Tahoe
24 Great Deals out of 911 listings starting at $11,900
Used Chevrolet Silverado 1500
202 Great Deals out of 5,975 listings starting at $2,975
Used Jeep Grand Cherokee
109 Great Deals out of 3,238 listings starting at $4,995
Used Toyota RAV4
108 Great Deals out of 2,083 listings starting at $3,888
Used Honda CR-V
103 Great Deals out of 3,896 listings starting at $1,795
Used Chevrolet Colorado
25 Great Deals out of 1,525 listings starting at $6,800
Used Ford Explorer
86 Great Deals out of 2,065 listings starting at $2,999
Used Ford Escape
124 Great Deals out of 4,594 listings starting at $1,995
Used Chevrolet Malibu
50 Great Deals out of 1,139 listings starting at $1,295
Used Toyota Camry
52 Great Deals out of 985 listings starting at $2,212

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.