Thermo King SB3 + CODE 20 Vapor Motor CR

Discussion in 'Refrigerated Trucking Forum' started by Jezwa, Aug 14, 2019.

  1. Jezwa

    Jezwa Bobtail Member

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    Jul 26, 2019
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    Thermo King SB3 + Started throwing A Code 20 and will not start in auto start. I replaced the fuel Filter but it did not fix the problem, After I clear the Code I can start it in Manuel Mode. Any help?
     
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  3. 062

    062 Road Train Member

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    Oct 20, 2013
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    Several things can cause that code. When it starts does it sputter? What is the battery voltage?
    On the one I have it was a bad ground. You’ll have a main ground for the battery, then another with 3-4 wires. My problem was with the 3-4 wire ground.
     
  4. Jezwa

    Jezwa Bobtail Member

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    Jul 26, 2019
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    I will look and see. I thought maybe it was vapor locking . Once I clear the code and flip at the manual it starts just fine .
     
  5. Jezwa

    Jezwa Bobtail Member

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    Jul 26, 2019
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    Voltage is 13.6 oil is 63 psi coil 32.6 the Amb air don’t work. Rpm 1600 DDUR 43
    Hours 35218 water Temp 184.3F
    Amps 0.8
     
  6. reeferwrencher

    reeferwrencher Medium Load Member

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    Aug 4, 2018
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    Fuel solenoid isn't energizing in auto. Do you know if the engine is yanmar or isuzu ?
     
  7. Jezwa

    Jezwa Bobtail Member

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    1
    Jul 26, 2019
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    It’s a Isuzu
     
  8. Jezwa

    Jezwa Bobtail Member

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    Jul 26, 2019
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    It will start and run maybe 6 times then on the 7th it won’t I did notice the starter Grinds when it does it
     
  9. reeferwrencher

    reeferwrencher Medium Load Member

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    Aug 4, 2018
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    Is it starting on auto now
     
  10. Jezwa

    Jezwa Bobtail Member

    19
    1
    Jul 26, 2019
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    It does. However stops on the 6th or 7 runs then flashes the 20 Code
     
  11. Cattleman84

    Cattleman84 Road Train Member

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    The Sticks, Idaho
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    Run it on continuous until you can get it to a shop to have it fixed... Or until you can figure out how to fix it yourself.
     
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