![My 2008 Mazda 3 Hatchback is throwing a P0037 code at start up. The 02 sensor fuse is fine, and I replaced the rear 02 My 2008 Mazda 3 Hatchback is throwing a P0037 code at start up. The 02 sensor fuse is fine, and I replaced the rear 02](https://ww2.justanswer.com/uploads/DR/drivefast1971/2013-07-12_172819_1.gif)
My 2008 Mazda 3 Hatchback is throwing a P0037 code at start up. The 02 sensor fuse is fine, and I replaced the rear 02
![Amazon.com: Automotive-leader 234-4329 4-Wire Downstream Oxygen O2 Sensor 2 for 2011-2013 Mazda 2 1.5L, 2004-2009 Mazda 3 2.0L, 2006-2009 Mazda 3, 2006-2008 Mazda 6 2.3L 2344329 15914 15916 : Automotive Amazon.com: Automotive-leader 234-4329 4-Wire Downstream Oxygen O2 Sensor 2 for 2011-2013 Mazda 2 1.5L, 2004-2009 Mazda 3 2.0L, 2006-2009 Mazda 3, 2006-2008 Mazda 6 2.3L 2344329 15914 15916 : Automotive](https://m.media-amazon.com/images/I/41nDKfP6b0L._AC_.jpg)
Amazon.com: Automotive-leader 234-4329 4-Wire Downstream Oxygen O2 Sensor 2 for 2011-2013 Mazda 2 1.5L, 2004-2009 Mazda 3 2.0L, 2006-2009 Mazda 3, 2006-2008 Mazda 6 2.3L 2344329 15914 15916 : Automotive
![Downstream Oxygen Sensor 234-4329 O2 Sensor 2 Replacement for Mazda 3 2.3L Calif. Emission Non-Turbo 2006 2007 2008 2009 : Amazon.sg: Automotive Downstream Oxygen Sensor 234-4329 O2 Sensor 2 Replacement for Mazda 3 2.3L Calif. Emission Non-Turbo 2006 2007 2008 2009 : Amazon.sg: Automotive](https://m.media-amazon.com/images/I/61X-zXOS3zS._AC_UF1000,1000_QL80_.jpg)
Downstream Oxygen Sensor 234-4329 O2 Sensor 2 Replacement for Mazda 3 2.3L Calif. Emission Non-Turbo 2006 2007 2008 2009 : Amazon.sg: Automotive
![MAZDA 3 2005 P0037 Bank 1 Sensor 2 | Oxygen Sensor Fault Code and DataStream Confirmation #shorts - YouTube MAZDA 3 2005 P0037 Bank 1 Sensor 2 | Oxygen Sensor Fault Code and DataStream Confirmation #shorts - YouTube](https://i.ytimg.com/vi/zMlmE50n1jk/mqdefault.jpg)
MAZDA 3 2005 P0037 Bank 1 Sensor 2 | Oxygen Sensor Fault Code and DataStream Confirmation #shorts - YouTube
![P0037 Code: Heated Oxygen Sensor Heater Control Circuit Low (Bank 1, Sensor 2) - In The Garage with CarParts.com P0037 Code: Heated Oxygen Sensor Heater Control Circuit Low (Bank 1, Sensor 2) - In The Garage with CarParts.com](https://www.carparts.com/blog/wp-content/uploads/2020/08/car-emission-test-1024x683.jpeg)
P0037 Code: Heated Oxygen Sensor Heater Control Circuit Low (Bank 1, Sensor 2) - In The Garage with CarParts.com
![AT Warning Light came on just for a couple of seconds...Car has 68,000 klms ..code is PO138 02 CIRCUIT HIGH VOLTGAGE AT Warning Light came on just for a couple of seconds...Car has 68,000 klms ..code is PO138 02 CIRCUIT HIGH VOLTGAGE](https://ww2.justanswer.com/uploads/drivefast1971/2011-12-12_151223_1.gif)