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355 slow down light

Discussion in 'Technical Q&A' started by 355Aloha, May 19, 2004.

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  1. 355Aloha

    355Aloha Karting

    Feb 15, 2004
    120
    Honolulu Hawaii
    Full Name:
    John N
    #1 355Aloha, May 19, 2004
    Last week in the middle of the day when I went out to lunch the Slow Down Light started to blink on after pushing the car a little hard in traffic. By the time I got to the 8th floor of the parkihg structure, it returned to normal.

    This AM after stopping for gas and driving a block or so the flashing light came back on and stayed on till I turned the car off at the office (about six blocks away)
    At 5:00 PM when I got back in the car and started the eng. the light started flashing and sTayed flashing for about 10 min and went out.

    Both times I cheched the water and oil temp, all normal.

    What gives? Why did it come on, on a cold eng? Does the software have a time out funtion before the light goes out? Why did it come on in the first place?
     
  2. Mitch Alsup

    Mitch Alsup F1 Veteran

    Nov 4, 2003
    9,741
    #2 Mitch Alsup, May 19, 2004
    Either the cat or the thermocouple or the Exhaust ECU (or real oxygen sensor) is going out.
     
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,931
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #3 Steve Magnusson, May 19, 2004
    "Both times I cheched the water and oil temp, all normal."

    When the warning light comes on immediately after a cold-restart it's surely an electrical gremlin/fault, but if after some driving the warning light comes on you should stop and visually inspect the exhaust system near where the thermocouple is located -- if it's a real over-temp fault, the exhaust flanges/tubes will be glowing red-hot (and nearby components might be smoking/burning a little). Water and oil temps will remain normal when the coachwork is on fire ;)
     

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