Help anti theft not letting car start

Asked by Oct 28, 2016 at 05:07 AM about the 2002 Ford Mustang Convertible

Question type: Maintenance & Repair

I have a 2002 mustang 3 weeks ago my
alternator was changed later that day the
car died it would crank but not start
thought it was the PCM. Replaced PCM
did a parameter reset with keys car
started worked great for 2 days died
again. Towed it to a mechanic they
replaced the PCM they had the car 2
weeks. I picked it up yesterday the car
died 15x I had to have it towed back to
the mechanic. They test drove it and they
died on the highway. I was told the anti
theft was kicking in and that's why the car
is stalling. I think this was probably the
issue in the first place. Only nobody can
figure out why. Is it possible that
changing the alternator (even though the
battery and alternator seem fine) is
causing this to happen? Of not what is?
Please help I haven't had my car in
3weeks and have spend over 1000 btw
resetting the keys the pcm I got the pcm
the mechanic got. Labor ECT.

2 Answers

15

Have you taken it to ford to get re-flashed? Any Ford dealer should be able to run a diagnostic get you flashed & get you rolling in no time usually $75-$150 to get it done!

I had a similar problem .theft light started flashing 2 weeks prior to my 2004 limited edition mustang wouldn't start one night. Theft control activated somehow? it would crank but wouldn't start. so i held my old key that had broken earlier this year next to my new key as i turn ignition back & forth not attempting to start it. old key somehow reset or fixed new key cause theft light went off and car started with ease . could have been just lucky that day but it worked

Your Answer

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,880
  • #2
    F_O_R
    Reputation
    1,410
  • #3
    Bob Beaman
    Reputation
    1,390
View All

Related Models For Sale

Used Chevrolet Camaro
378 Great Deals out of 31,276 listings starting at $3,495
Used Chevrolet Corvette
124 Great Deals out of 16,131 listings starting at $3,995
Used Ford Mustang SVT Cobra
5 Great Deals out of 263 listings starting at $4,795
Used Ford F-150
3,018 Great Deals out of 230,446 listings starting at $1,300
Used BMW 3 Series
1,119 Great Deals out of 33,866 listings starting at $1,209
Used Chevrolet Silverado 1500
2,727 Great Deals out of 156,993 listings starting at $1,000
Used Jeep Wrangler
366 Great Deals out of 20,464 listings starting at $2,500
Used Nissan 350Z
23 Great Deals out of 1,135 listings starting at $3,495
Used Honda Accord
858 Great Deals out of 87,670 listings starting at $1,444

Used Cars For Sale

2018 Ford Mustang For Sale
16,761 listings starting at $19,995
2017 Ford Mustang For Sale
77 Great Deals out of 7,889 listings starting at $15,799
2016 Ford Mustang For Sale
43 Great Deals out of 2,468 listings starting at $12,391
2015 Ford Mustang For Sale
33 Great Deals out of 2,375 listings starting at $12,000
2014 Ford Mustang For Sale
45 Great Deals out of 2,209 listings starting at $8,998

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.