The actuator motor within the electronic throttle body may be failing.
If the code is triggered by an intake actuator fault, the vehicle may suffer from a rough, surging idle or stall unexpectedly when coming to a stop. p158b renault
It's also worth noting that code P158B is not exclusive to Renault. It can appear in other brands like BMW (where it relates to idle actuator governor monitoring), Mini, and even Volvo models that use Renault-sourced engines. The actuator motor within the electronic throttle body