P158b Renault

Want me to expand this into a longer mystery or turn it into a script for a short film?

If the check engine light is on but performance feels normal, you can drive moderately to a workshop. However, avoid full-throttle accelerations until the fault is diagnosed. p158b renault

Inspect all vacuum hoses for cracks or disconnection. Want me to expand this into a longer

Over time, oil vapors and soot can create "gunk" in the intake, physically blocking the idle air valve from moving. p158b renault

The mechanical component itself may have seized or failed internally.

The fault code is officially described by some technicians as a "flywheel protection" mechanism.