Can't accelerate and warning light and the fail safe mode and check charging system message are showing. Please any advice.

Asked by Jul 02, 2016 at 05:56 PM about the 2005 Ford Mustang V6 Premium

Question type: Maintenance & Repair

Hello my car is a 2005 Mustang V6 with no modifications. I recently noticed I
had a battery leak from the negative terminal. I replaced the battery and went
to start my car, it started but will not allow me to accelerate. I am also now
getting the engine warning light and the fail safe mode and check charging
system message are showing. Please any advice.

2 Answers

45

Did you clean the terminals before you put them on the new battery? Could be a bad connection. Also check the grounds and clean them. These cars are known for weak alternators as well. Is there an engine light/code that you can pull? Fail safe can be cause by a number of things, typically when a sensor measures a parameter and it is out of spec.

My car is back on the road. The throttle body unit had to be replaced.

Your Answer

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,970
  • #2
    F_O_R
    Reputation
    1,490
  • #3
    Bob Beaman
    Reputation
    1,420
View All

Related Models For Sale

Used Dodge Charger
242 Great Deals out of 32,689 listings starting at $1,800
Used Chevrolet Corvette
101 Great Deals out of 15,518 listings starting at $3,900
Used Ford Mustang SVT Cobra
3 Great Deals out of 215 listings starting at $4,900
Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used BMW 3 Series
833 Great Deals out of 32,432 listings starting at $995
Used Chevrolet Silverado 1500
1,781 Great Deals out of 149,286 listings starting at $1,495
Used Jeep Wrangler
250 Great Deals out of 19,077 listings starting at $2,500
Used Nissan 350Z
26 Great Deals out of 984 listings starting at $3,500
Used BMW M3
12 Great Deals out of 1,668 listings starting at $6,995
Used Honda Civic
333 Great Deals out of 52,980 listings starting at $1,200

Used Cars For Sale

2014 Ford Mustang V6 Premium For Sale
3 Great Deals out of 189 listings starting at $9,995

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.