Why does the brake dash warning light come on when engine is idling and go out when engine speeds up.

Asked by Mar 01, 2015 at 10:45 AM about the 2010 Jeep Liberty Sport 4WD

Question type: Maintenance & Repair

This seems to happen only when engine is cold. Stop at stop light -light comes on, leave
stop light - light goes out?

2 Answers

25,855

It could be something as simple as vacuum loss to the brake booster. When you are driving you are creating more vacuum. When you are at idle, you create less. If there is a small leak in a vacuum line, it will be noticeable when at idle and negligible when driving at speed.

2 of 2 people found this helpful.
69,485

Also check the fluid level in the master cylinder. It could be low. HTH. -Jim

1 of 1 people found this helpful.

Your Answer

Jeep Liberty Experts

  • #1
    fixmyjeep
    Reputation
    1,330
  • #2
    Tom Demyan
    Reputation
    1,150
  • #3
    rst429
    Reputation
    1,060
View All

Related Models For Sale

Used Jeep Patriot
328 Great Deals out of 15,459 listings starting at $2,395
Used Jeep Grand Cherokee
894 Great Deals out of 71,205 listings starting at $995
Used Jeep Wrangler
280 Great Deals out of 15,911 listings starting at $2,997
Used Ford Escape
1,107 Great Deals out of 84,744 listings starting at $999
Used Jeep Compass
246 Great Deals out of 33,865 listings starting at $2,000
Used Jeep Commander
72 Great Deals out of 1,752 listings starting at $2,490
Used Jeep Wrangler Unlimited
292 Great Deals out of 40,854 listings starting at $9,995
Used Honda CR-V
829 Great Deals out of 53,823 listings starting at $1,007
Used Toyota RAV4
873 Great Deals out of 58,800 listings starting at $1,690
Used Dodge Nitro
61 Great Deals out of 2,019 listings starting at $2,500
Used Toyota 4Runner
252 Great Deals out of 21,537 listings starting at $2,300
Used Nissan Xterra
78 Great Deals out of 3,314 listings starting at $1,995
Used Honda Civic
789 Great Deals out of 76,861 listings starting at $900

Used Cars For Sale

2012 Jeep Liberty Sport 4WD For Sale
27 Great Deals out of 636 listings starting at $5,995
2011 Jeep Liberty Sport 4WD For Sale
17 Great Deals out of 365 listings starting at $5,500
2010 Jeep Liberty Sport 4WD For Sale
14 Great Deals out of 358 listings starting at $5,395
2009 Jeep Liberty Sport 4WD For Sale
8 Great Deals out of 198 listings starting at $3,999
2008 Jeep Liberty Sport 4WD For Sale
23 Great Deals out of 516 listings starting at $3,990

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.