Used primarily as a position sensor (e.g., for throttle position, HVAC blend doors, or suspension leveling). Common Applications in Renault Vehicles
Controlling the brightness of the instrument cluster lights. Climate Control:
An uncontrolled air leak in the intake system (e.g., intake manifold gasket, vacuum hoses) can cause idle issues.
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.
What is the of your Renault (e.g., Duster, Clio)? Does it have a diesel (dCi) or petrol (TCe) engine? Are you experiencing rough idle or stalling ? p158b renault
P0158 Code: Causes, Cost to Fix & Can I Drive? (2026) - Auto Barn
He passed away that night. His heart simply stopped. Like an engine that had finally reached zero.
, or as a sensor for mechanical positions where a reliable electrical signal is needed based on manual rotation. Key Technical Specifications
is a vital "under-the-hood" hero for classic automotive enthusiasts. Specifically engineered for legacy electrical systems, this component acts as a variable resistor that translates mechanical movement into electrical signals—crucial for functions like throttle position sensing or interior dimming controls. : It features a Used primarily as a position sensor (e
Whether you're troubleshooting a rough idle or restoring a dashboard to its original glory, the
1. Activating the "Check Engine" or "Injection Fault" Warning
: Low voltage can often trigger ghost codes like DF038 (internal electronic failure), which may accompany other drivetrain errors. New Sandero stalling on purpose! - UK Dacia Forum
Whenever you clean or replace a throttle component on a Renault, the ECU must relearn the minimum and maximum stop positions. You can perform this manually on most models: It's also worth noting that code P158B is
Use the P158B potentiometer when you need a precise
"She’s not sulking, she’s confused," Elias muttered, wiping grease from his hands with a blue rag that had seen better days. "P158B. The database says 'Supply Voltage Circuit Low.' But I’ve checked the battery, the alternator, the ground straps. You’ve got twelve volts pumping through her veins like champagne."
If you need more specific advice, please share your car's make, model, and engine year. This will help narrow down the diagnostic path.