P158b Renault [exclusive]

To help narrow down the exact issue with your vehicle, could you share the of your Renault (e.g., 2018 Clio 1.5 dCi), or note whether any other fault codes appeared alongside P158B? Share public link

Because the Stop & Start system relies perfectly on knowing the precise cylinder and flywheel positions to restart the engine instantly, any signal error completely deactivates the system.

P0158 Code: Causes, Cost to Fix & Can I Drive? (2026) - Auto Barn p158b renault

The P158B code is a specific fault code that appears on Renault vehicles' onboard diagnostics (OBD) system. This code indicates a problem with the vehicle's cruise control system. Specifically, it relates to the adaptive cruise control system, which is designed to maintain a safe distance from the vehicle ahead.

Over time, carbon deposits and oil blow-by vapors build up inside the throttle body bore. This physical restriction prevents the internal valve plate from hitting its targeted angle, forcing the sensor voltages out of bounds. To help narrow down the exact issue with

The engine RPM may rise and fall unexpectedly at a stoplight or while idling, sometimes called "surging" or "hunting."

If you are dealing with this code on your own car, sharing the (e.g., Clio V, Captur Hybrid) or any other fault codes pulled alongside it would help pinpoint if it is an electrical glitch or a mechanical part failure. Share public link (2026) - Auto Barn The P158B code is

The Diagnostic Trouble Code (DTC) in Renault and Dacia vehicles stands for a specific manufacturer-controlled sensor error: "Informazione Segnale Volano" (Flywheel Signal Information / Flywheel Sensor Circuit Fault) .

If a P158B potentiometer fails, it can lead to erratic engine behavior or unresponsive climate controls.

linear resistance profile, ensuring that electrical output remains consistent and predictable throughout the dial's rotation, as noted on AliExpress .

: Hardware associated with this designation often involves a 1kΩ linear resistance potentiometer used in older or vintage Renault repair solutions to manage signal feedback. Potential Symptoms If your Renault is throwing this code, you may experience: