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
    4,540
  • #2
    Bob Beaman
    Reputation
    1,250
  • #3
    COMETGUY61
    Reputation
    1,090
View All

Related Models For Sale

Used Dodge Charger
460 Great Deals out of 27,845 listings starting at $2,795
Used Chevrolet Corvette
249 Great Deals out of 22,275 listings starting at $2,500
Used Ford Mustang SVT Cobra
4 Great Deals out of 200 listings starting at $4,200
Used Ford F-150
2,225 Great Deals out of 182,703 listings starting at $1,500
Used BMW 3 Series
1,042 Great Deals out of 31,743 listings starting at $1,000
Used Jeep Wrangler
281 Great Deals out of 15,908 listings starting at $2,997
Used Chevrolet Silverado 1500
2,154 Great Deals out of 183,563 listings starting at $1,898
Used Honda Civic
849 Great Deals out of 78,667 listings starting at $900
Used Nissan 350Z
68 Great Deals out of 1,217 listings starting at $3,917
Used Honda Accord
1,029 Great Deals out of 63,283 listings starting at $999

Used Cars For Sale

2014 Ford Mustang V6 Premium For Sale
11 Great Deals out of 287 listings starting at $10,799

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.