but at higher engine speeds and loads, they may not spray enough fuel to maintain the proper air/fuel ratio. The effect on fuel trim would be the same as a weak fuel pump - close to normal at idle but going more positive
Given the cooling system problems, it's a good idea to check the engine coolant level regularly and have the cooling system test done if the level is very low or the engine overheats or leaks are suspected. A badEGR valveis a common cause for the Check Engine light with the code P0401...
Supercharger Overboost Condition The PCM disables (bypasses) the supercharger boost and sets a diagnostic trouble code (DTC) to keep from damaging the powertrain (engine or transmission) during potential harmful operating conditions. Brake torque (brake on and throttle at wide open) Transmission oil...
Damaged EGR vacuum regulator solenoid Damaged PCM A DPFEGR PID reading that is greater at idle than during key ON and engine OFF by 0.5 volt or a rough engine idle, may indicate a hard fault. P0403 EEGR Electric Motor Windings Or Circuits To The PCM Shorted Or Open The EEGR system is...