lizzard-t. Last code P0399 = cylinder number 1 pressure sensor circuit erratic state incorrect mounting . Basically you have a pressure sensor built into the glow plug the pressure sensor measure the pressure in the cylinder on overrun to determine correct timing of fuel delivery .the sensor may have a carbon build up on its tip or the sensor
Replaced EGR valve on 2014 Vauxhall Movano 2.3tdci, same as Renault Master 2.3dti Cleaned egr and removed carbon build up using Mr Muscle foaming oven cleane
P0403 on 1997 Dodge Intrepid I have trouble code P0403 - EGR FLOW CIRCUIT MALFUNCTION on a 1997 Dodge Intrepid, 3.5L engine. I replaced the EGR valve. The new valve came in 2 parts, it included a differential pressure sensor attached with hoses. The engine light is on most of the time, but it goes out some times. One of the t