Renault 'link' - P158b

Test the actuator for proper operation. If the wiring is sound, the actuator likely needs replacement. Potential Fixes

In some diesel models, high voltage readings from the exhaust pressure sensor can trigger related codes. p158b renault

You might experience sluggish acceleration or "limp mode" in some instances. Difficulty Starting: Engine cranks but struggles to start. Potential Causes for Renault P158B Test the actuator for proper operation

If on a dCi engine, check the exhaust pressure sensor for high voltage readings, particularly with the ignition on. particularly with the ignition on.