Help! 355 Air Bag & Fuel lights come on.

Discussion in 'Technical Q&A' started by 04-E55, Mar 6, 2004.

  1. 04-E55

    04-E55 Rookie

    Jan 20, 2004
    When driving my 355 at night with the headlights on the fuel and the airbag lights come on, as soon as I turn the lights off everything seems to work fine. I'm thinking it could be the alternator but not sure. Can anyone confirm this? Thanks in advance.
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  3. thecarreaper

    thecarreaper F1 World Champ
    Silver Subscribed

    Sep 30, 2003
    maybe my luck is good today as i replied to the other 355 thread , and it all seemed to work out. before you goto a dealer, if you are somewhat mechanically inclined, put a muti meter on your battery with the car off and get a reading. it should read 12.5 v or better with the car cold. if its less or WAY less then you were driving off the battery power , meaning your alternator/voltage regulator / diodes are bad. if you car was running on the battery, and say you goto start it up today and it has juice and runs, then i would reccommend doing the disconnect battery and wait 10 minutes like in the other thread.( to reset the ECU) start the car and check the battery voltage again, should be " around" 14.0 v +/- say .7 i am not a ferrari owner , this is coming from my general mechanic abilities for what its worth. if your warning lights are out and you drive the car ( daytime) with the lights on and they dont come back, goody goody!!! you should still get a dealer / whomever to pull the codes stored in the ECU in case there is a serious problem. airbag warning lights are not to be ignored !!!!!! if ( big if) the alternator is bad or has doiodes going bad, perhaps the ECU was fooled into showing those lights. for your safety and your cars i would be sure you get this resolved before jumping in for a fun weekend drive!!! if you need multimeter help pm and i will help you with it. i hate to see an unaswered " help me!" thread, so i hope i pointed you in a good direction. best wishes!!! michael " not a owner yet " car-reaper!!!!

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