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B1503

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by schmuber, Feb 10, 2022.

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  1. schmuber

    schmuber Member

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    Have been getting a persistent B1503 for a few weeks now. No other codes, the car seems to function perfectly otherwise. No drop in MPG, no other noticeable ill effects…

    If I clear DTCs, B1503 comes back up almost immediately upon startup.

    What order of troubleshooting would y'all recommend?
     
    #1 schmuber, Feb 10, 2022
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  2. PriusCamper

    PriusCamper Senior Member

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    First of all, I had no idea we could upload an animated profile pic? You've changed my life on Priuschat forever!
     
    #2 PriusCamper, Feb 10, 2022
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  3. PriusCamper

    PriusCamper Senior Member

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    Second of all, Mendel has your answer here: B1503 code, under uphill load | PriusChat
     
    #3 PriusCamper, Feb 10, 2022
  4. douglasjre

    douglasjre Senior Member

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    What did you find was the cause?
     
    #4 douglasjre, Jul 17, 2023
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