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Car won’t start, only check engine light on

Discussion in 'Gen 2 Prius Technical Discussion' started by AVS1, Nov 23, 2018.

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  1. dolj

    dolj Senior Member

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    While technically correct, it is more like dipping down to 9V - 9.5V before you will see the master warning light (MWL) flash.

    I know this because I have wired in a voltmeter and observe my car dipping below 11V (typically 11.6V - 11.8V) on the initial startup and I never see the MWL flash at this high a voltage. (When I see the low voltage, though, I put my 12V battery on the charger at the next convenient opportunity.)

    Just for everyone's information.
     
    #61 dolj, Dec 23, 2020
    jerrymildred likes this.
  2. jerrymildred

    jerrymildred Senior Member

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    Same here and then some. My old 2005 got down under 9 volts. If I recall the exact number it was 8.7V. No MWL. The only sign something was amiss was that the brake accumulator was taking a very long time to make pressure when I got in the car to drive it.
     
    #62 jerrymildred, Dec 24, 2020
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