Peugeot ^new^ | P306d

The Engine Control Unit (ECU) constantly compares the angle of the electronic throttle butterfly valve with the readings from the Manifold Absolute Pressure (MAP) sensor. When the air pressure entering the engine does not match what the ECU expects for a given throttle position, it triggers this "coherence" fault.

Disconnect the plugs, inspect for "green" corrosion (copper oxidation), and use a high-quality contact cleaner. Immediate Next Steps p306d peugeot

The engine restricts power, limiting speed to around 30-40 mph. The Engine Control Unit (ECU) constantly compares the

Check the throttle body and MAP sensor for carbon buildup or electrical damage. Check the EVAP Solenoid: inspect for "green" corrosion (copper oxidation)