A broken or stuck-open purge valve can cause the intake pressure to be slightly off (e.g., 990 mbar instead of the requested 960 mbar), triggering the "incoherence" fault. Replace the purge valve or the entire EVAP canister , usually located below the air box housing. Throttle Body Contamination or Failure The Issue:
between the position of the motorized throttle housing (air mixer) and the inlet air pressure. This fault often triggers an engine management light (EML), "Limp Mode," or speed limiter failures. Common Fixes and Solutions p306d peugeot fixed
: Inconsistency between the measured throttle valve position and the intake manifold pressure. Common Symptoms : Activation of "Check Engine" light. A broken or stuck-open purge valve can cause
If your Peugeot is displaying the , you're likely dealing with a "coherence" error in the intake system. Specifically, this code indicates a mismatch between the throttle housing (air mixer) position and the inlet air pressure measured by the computer. This fault often triggers an engine management light
Peugeot electronics are highly sensitive; a failing battery can sometimes trigger unrelated sensor "coherence" codes. French Car Forum Are you experiencing any other symptoms, like rough idling when you come to a stop? P306D-22 coherence problem - French Car Forum