# P0137 on the 2016 Mazda Mazda6

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name P0137

- [10093366](https://open.wenmarpro.com/bulletins/10093366), 2017-03-01: IF YOU ENCOUNTER A VEHICLE WITH DTC P0137 \(CIRCUIT LOW INPUT\), CHECK THE REAR HARNESS AT THE RED CIRCLED AREA IN THE FOLLOWING DIAGRAM. IF AN AFTERMARKET ALARM SYSTEM IS INSTALLED, THE REAR HARNESS MIGHT HAVE RECEIVED DAMAGE FROM ELECTRO\-TAP CONNECTORS \(A\) OR TO THE PROTECTOR TUBE \(B\). THIS DAMAGE IS NOT COVERED UNDER WARRANTY.
- [10092342](https://open.wenmarpro.com/bulletins/10092342), 2017-02-21: SOME CUSTOMERS MAY COMPLAIN ABOUT A CHECK ENGINE LIGHT ON WITH DTC P0137 \(HO2S CIRCUIT LOW INPUT\) STORED IN PCM MEMORY. THIS MAY BE CAUSED BY REAR HARNESS DAMAGE FROM AN AFTERMARKET ALARM SYSTEM INSTALLATION.
- [10086522](https://open.wenmarpro.com/bulletins/10086522), 2016-12-17: IF YOU ENCOUNTER A VEHICLE WITH DTC P0137 \(CIRCUIT LOW INPUT\), CHECK THE REAR HARNESS AT THE RED CIRCLED AREA IN THE FOLLOWING DIAGRAM. IF AN AFTERMARKET ALARM SYSTEM IS INSTALLED, THE REAR HARNESS MIGHT HAVE RECEIVED DAMAGE FROM ELECTRO\-TAP CONNECTORS \(A\) OR TO THE PROTECTOR TUBE \(B\). THIS DAMAGE IS NOT COVERED UNDER WARRANTY.