P158b Renault ((new)) Instant
The vehicle might stall, especially when coming to a stop.
Diagnosing the P158B code requires a systematic approach to check both the component and the wiring.
DTC (Diagnostic Trouble Code) P158B is generally interpreted as an . In some Renault contexts, particularly in diesel engines like the 1.5 dCi, it can be linked to exhaust pressure sensor voltage issues. p158b renault
The Engine Control Module (ECM) sets this code when it detects that the actuator or sensor responsible for managing idle speed or exhaust pressure is operating outside its expected factory specifications. Renault (and Dacia) System: Powertrain / Idle Air Control Code Type: Manufacturer-Specific (P-Code) Common Symptoms of P158B
The component itself has failed.
You might experience sluggish acceleration or "limp mode" in some instances. Difficulty Starting: Engine cranks but struggles to start. Potential Causes for Renault P158B
In some diesel models, high voltage readings from the exhaust pressure sensor can trigger related codes. The vehicle might stall, especially when coming to a stop
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 ?
Inspect the wiring harness and connectors associated with the idle control actuator. Look for broken, bent, or corroded pins. In some Renault contexts, particularly in diesel engines