subzero05

Drving over to the dealership actually to talk about the revised gas tank situation and the message center flashed "failsafe engine mode" and the CEL came on!..WTF? car lost most all of its power so I shut it off at the dealership and then when I went to start it up again to bring it into the service department there was no message and no light...car seemed fine again!..I and the tech though may be just a glitch so I took it home and no problem....Well, just went to get some dinner and Voila!..."failsafe mode" and CEL again!...NO POWER!..Any ideas?...Guess I'll be dropping her off tomorrow for the first actual service visit

2005MustangGT

Haven't experience this w/ my 05 GT, but a friend of mine has a newer Corvette, and has advised on the Corvette forums this happens repeatedly on the Corvettes, and is normally a ground wire or a corroded connection at the battery.
It's crazy how sensitive these newer vehicles are becoming.
Hope this helps.
Bucky

nicksolheim

Hey subzero, let us know what's up! That is when you find out.

steal101

It happened to me. It was a miss fire on 3 and 5 and the loss in power is a safe mode also called limp home mode.

HOTLAP

Probably not a terminal issue - just a sensor or something - could even be your gas cap not correctly installed! You would think the dealer could read it though - doesn't the computer store error codes?

2005MustangGT

that is f-ing crazy, not even 5,000 miles on these cars and they are acting stupid...
mine just triggered the service engine light-but I'm sure it is b/c I just hollowed out the catalytic converters, but my car has some serious problems after I get off the interstate (going about 70-80mph for a few minutes).
It starts bucking/loss of power when I try to accelerate...but doesn't trigger a light.
the dealer said if the light doesn't come on, then oh well...pretty much.

nicksolheim

I have 5,000 miles on mine, and no problems. Of course I haven't made any mod's yet! Hope the dealers don't turn you guys away.

2005MustangGT

my problems were happening before the mods, so i figured what the heck, might as well mod it if the dealership isn't going to be able to help any....LOL

HOTLAP

Wouldn't your missing cats trigger a light as the pre & post cat sensors can tell that the smog levels are not be properly reduced by the cats? Also, with a less restrictive exhaust - wouldn't the ECU be running too lean - and that may be causing issues as well?

2005MustangGT

c note right above yours HOTLAP, we were posting at the same time it appears.

HOTLAP

Sorry bout that and good luck getting things back to normal!! B)

2005MustangGT

no problem, I just responded to you post " your experiences/opinions please" also

subzero05

Steal, what did the dealership end up doing about yours?..Replacing the coil packs on 3 & 5 or ?..I am dropping the vehicle off today to have them fix it or screw it up more, depending on how you look at it =)

porsche

mine lost half power and wrench light went on then i restarted and was fine.

clintoris

if it's not related to the misfiring in the TSB post http://forums.bradbarnett.net/index.php?showtopic=16258 then I'd go to the dealer and whether or not the want to read the codes, tell them you want to do a drivability test. They'll put a lop top in the front seat, hook it up and catch it while it's happening instead of trying to read stored codes. If they bock, keep pushin'. I wouldn't settle for "can't help you."

joeuser42

That seems perfectly logical to me if you are screwing around with the emission control system.

S197 GT

Had my CEL on twice now. Once for a bad coil pack and another they said was just a bug in the system. Both times, the engine "powers down". I guess a safety feature.

subzero05

update; Got my car back from the dealership and they replaced the "TP sensor" and reprogrammed the ECM with a GENII upload so they call it on the invoice.Seems to be fine now.Dealer said some vehicles may experience a voltage drop in the TP sensor and will cause the vehicle to go into "limp mode" and the CEL will go on..

rhoover2

Glad to hear the dealer took acre of your problem without getting into a squable with you about your mods.

clintoris

I hope they changed the design on their T/P sensors.... the one that I replaced in my Bronco a bit ago was just craptacular.... easy to see how it could fail... or even break on installation.