# Mini Cooper R56 P0137 code **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [January 21, 2019, 5:44pm UTC](https://community.cartalk.com/t/mini-cooper-r56-p0137-code/133048 "2019-01-21T17:44:59Z")\ **Posts on this page:** 1\ **Showing post:** 43
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [February 11, 2019, 12:38am UTC](https://community.cartalk.com/t/mini-cooper-r56-p0137-code/133048/43 "2019-02-11T00:38:09Z")
They’re referred to as _o2 sensors_ or _oxygen sensors_ in the service data I’m looking at. I’m not sure if that means they really are the traditional narrow band sensor, or they are in fact the wideband air-fuel-ratio sensor. On the electrical schematic, the section where the power-train control circuit is shown is referred to as “lambda control”. By the looks of the circuit, the pre-cat sensor has 3 _current outputs_, labeled - alsvr1 (GE) - Yellow - alsvp1 (WS) - White - ilsvp1 (GE) – Yellow Apparently GE mean “yellow” and WS means “white” in mini-speak , referring to the wire colors I guess. The current outputs are converted to voltages by transistors located on the “DME Control Unit”. Given that the outputs appear to be currents, I’m presuming these are wide-band air-fuel ratio sensors rather than narrow band sensors. The post-cat sensor is slightly different, and only has 1 output, and that appears to also be a current output, implying it is a wide-band air-fuel ratio sensor. I concur that the diagnostic process would be less ambiguous if the nomenclature used by the car manufacturers was consistent. --- _[View the full topic](https://community.cartalk.com/t/mini-cooper-r56-p0137-code/133048)._