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

5,855

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~

5,855

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.
5,855

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

1 of 1 people found this helpful.
5,855

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 10,421 nationwide CTS listings starting at $2,400.

ZIP:

Cadillac CTS Experts

  • #1
    Brandon Foster
    Reputation
    1,410
  • #2
    Gaetano Viesti
    Reputation
    1,020
  • #3
    RushIII
    Reputation
    700
View All

Related Models For Sale

Used Cadillac CTS-V
12 Great Deals out of 628 listings starting at $8,999
Used Cadillac SRX
529 Great Deals out of 9,736 listings starting at $2,750
Used Cadillac STS
38 Great Deals out of 948 listings starting at $2,800
Used Chrysler 300
336 Great Deals out of 18,646 listings starting at $900
Used Dodge Charger
342 Great Deals out of 30,046 listings starting at $2,000
Used Cadillac DTS
47 Great Deals out of 1,556 listings starting at $2,490
Used Cadillac Escalade
228 Great Deals out of 12,054 listings starting at $2,000
Used BMW 5 Series
472 Great Deals out of 15,627 listings starting at $1,500
Used Mercedes-Benz C-Class
734 Great Deals out of 29,030 listings starting at $1,500
Used BMW 3 Series
1,025 Great Deals out of 33,544 listings starting at $1,000

Used Cars For Sale

2017 Cadillac CTS For Sale
40 Great Deals out of 2,111 listings starting at $26,995
2016 Cadillac CTS For Sale
10 Great Deals out of 530 listings starting at $23,999
2015 Cadillac CTS For Sale
8 Great Deals out of 302 listings starting at $19,000
2014 Cadillac CTS For Sale
75 Great Deals out of 1,737 listings starting at $13,595
2013 Cadillac CTS For Sale
17 Great Deals out of 340 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.