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.

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