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Intermittent Code P2237 even after replacing both upstream O2 sensors. 2010 Taco 4.0 2wd

Discussion in '2nd Gen. Tacomas (2005-2015)' started by LogicalFool, Sep 18, 2021.

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Sep 18, 2021 at 4:25 PM

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LogicalFool [OP] Well-Known Member

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I'm really scratching my head on this one. Both sensors are Denso. The code comes on intermittently and performance seems unaffected.

LogicalFool, Sep 18, 2021

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Sep 18, 2021 at 4:46 PM

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TnShooter The TacomaWorld Stray

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That is a generic code for an Open in the B1S1 A/F Sensor.
I would check the connections first, then monitor sensor with a scan tool if you have one.
https://www.yourmechanic.com/articl...l-circuit-open-bank-1-sensor-1-by-jay-safford

TnShooter, Sep 18, 2021

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