Can adding too much coolant cause the engine light to come on?

20

Asked by Feb 16, 2016 at 05:17 PM about the 2006 Cadillac CTS 3.6L Sport RWD

Question type: Maintenance & Repair

I added coolant because the coolant light came on.
20 mind later the engine light came on.

6 Answers

5,955

may be a co-incidence~ what happens is that fluid expands....that's how there is a COLD and HOT levels on the translucent reservoir tank~ but putting too much in...will percolate out the drip tube and push out the excess till HOT temps are reached...when you park the expansion will turn into contraction...and we can hope will settle down to the line for cold...exactly....what a perfect world...sign me up~

5,955

the Check engine may be because 1.) you left your gas cap off 2.) you filled up to the cap rather then stopping at the FIRST CLICK dammit~ 3.) the oxygen sensor is all used up or malfunctioning~ 4.) maintenance schedule says "Now's the time to bring it in for the 30,000 mi checkup could be anything really...sure hope you do not solve it with the famous BLACK TAPE solution...that is bad and will cause MORE pollution!~

20

Thanks for responding. I checked the gas cap and that wasn't the culprit. I checked the level in the reservoir and it is well above the cold line. Thats why I thought maybe it was that. I have 13% oil life, 36%transmission life and 14.5% battery life. Could be one of those as the culprit too right?

1 of 1 people found this helpful.
20

That's transmission fluid life.

1 of 1 people found this helpful.
5,955

please you did not fill it up past the first click...that would have choked the evaporative system and the light would come on~

2 of 2 people found this helpful.
5,955

that's all I got...thank you...for the positive energy you brought me today am giving you one of my 1/288 paintings...gonna make 1000 of them....in time~

Your Answer

CTS

Looking for a Used CTS in your area?

CarGurus has 10,030 nationwide CTS listings starting at $2,000.

ZIP:

Cadillac CTS Experts

  • #1
    Brandon Foster
    Reputation
    1,430
  • #2
    Gaetano Viesti
    Reputation
    1,040
  • #3
    Msparker1121
    Reputation
    710
View All

Related Models For Sale

Used Cadillac CTS-V
4 Great Deals out of 589 listings starting at $8,995
Used Cadillac SRX
437 Great Deals out of 9,748 listings starting at $2,995
Used Chrysler 300
398 Great Deals out of 19,056 listings starting at $2,200
Used Cadillac Escalade
311 Great Deals out of 11,485 listings starting at $2,500
Used Dodge Charger
448 Great Deals out of 34,718 listings starting at $2,000
Used Cadillac STS
19 Great Deals out of 899 listings starting at $2,500
Used Cadillac DTS
46 Great Deals out of 1,553 listings starting at $2,500
Used BMW 3 Series
1,103 Great Deals out of 33,000 listings starting at $1,200
Used Chevrolet Corvette
139 Great Deals out of 16,114 listings starting at $3,000

Used Cars For Sale

2017 Cadillac CTS For Sale
38 Great Deals out of 1,704 listings starting at $24,999
2016 Cadillac CTS For Sale
8 Great Deals out of 447 listings starting at $24,977
2015 Cadillac CTS For Sale
16 Great Deals out of 320 listings starting at $17,950
2014 Cadillac CTS For Sale
67 Great Deals out of 1,419 listings starting at $11,570
2013 Cadillac CTS For Sale
18 Great Deals out of 324 listings starting at $7,997

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.