Hi there ist post...Help code P2237 af sensor

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by 210PRIUS, May 1, 2018.

  1. 210PRIUS

    210PRIUS New Member

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    Lyndonville VT
    Vehicle:
    2010 Prius
    Model:
    Three
    Well I got my car inspected. They ran a scan on the obdii sytem. It passed but had a light on when done. Had no light prior..Code 2237.bank one AF o2 sensor..
    2010 54,000 miles.
    questions. Method for testing sensor bank one..anyone have resistance readings?
    2 white wires the heater?
    Can it be removed from the bottom?
    I'm guessing the signal from the sensor is not getting to the ecm?
    electrical diagram that is readable and usable. What I've seen is a joke.

    Thanks in advance....I've been a mechanic for 50 years experienced in electronics and auto systems..

    Dick
     
    #1 210PRIUS, May 1, 2018
  2. 210PRIUS

    210PRIUS New Member

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    bump. anyone?
     
    #2 210PRIUS, May 2, 2018
  3. NutzAboutBolts

    NutzAboutBolts Senior Member

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    Here you go, most likely you have a bad Air fuel ratio sensor... hopefully that's the only issue, or else it would be an ECM.
     

    Attached Files:

    #3 NutzAboutBolts, May 3, 2018
  4. m.wynn

    m.wynn Senior Member

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    Assuming it's a factory Denso A/F sensor, I think you're going to find the 2 black wires are the heater circuit.

    It may be possible to access from below but pulling the wiper tray makes for a completely unobstructed shot from above. Actual room to work and everything! BBB Industries' free tsb/wiring diagrams from their TECH section are usually decent but you do have to go through a short registration..

    54k miles on a 2010? I'd try the Italian tune-up for a day or 2. Hit some long climbs on 91 with your foot smashed to the floor. Seriously...:D
     
    #4 m.wynn, May 3, 2018
    NutzAboutBolts and Raytheeagle like this.
  5. Juan Carlos San miguel

    Juan Carlos San miguel New Member

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    ----USA----
    [QUOTE = "210PRIUS, publicación: 2718616, miembro: 164253"] Bueno, hice que inspeccionaran mi auto. Hicieron un escaneo en el sistema obdii. Pasó pero tenía una luz encendida cuando terminó. No tenía luz antes ... Código 2237.Banco un sensor de o2 AF ...
    2010 54.000 millas.
    preguntas. Método para probar el banco de sensores uno ... ¿Alguien tiene lecturas de resistencia?
    2 cables blancos el calentador?
    ¿Se puede quitar del fondo?
    Supongo que la señal del sensor no llega al ecm.
    diagrama eléctrico legible y utilizable. Lo que he visto es una broma.

    Gracias de antemano ... He sido mecánico durante 50 años con experiencia en electrónica y sistemas automotrices ...

    Dick [/ CITA]
     
    #5 Juan Carlos San miguel, Jul 17, 2021
  6. Juan Carlos San miguel

    Juan Carlos San miguel New Member

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    Hi! could you solve the problem?
     
    #6 Juan Carlos San miguel, Jul 17, 2021
  7. James Analytic

    James Analytic Member

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    Do you know if the spec is the same for the gen 2 AF sensor?

    Great to know for my 2013 if ever needing, though I was wondering with my 2006 since I grabbed one from the yard.
     
    #7 James Analytic, Mar 21, 2023
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