DTC 44 - EGR Pulse Width Error - "G" Series: Notes

PCM operates the normally-open solenoid to control the EGR valve. By providing a ground path the PCM energizes the solenoid allowing vacuum to pass to the EGR. During normal operation, the PCM compares EGR duty cycle signal with EGR control pressure/BARO signal and makes adjustments in duty cycle accordingly. If there is a difference in the PCM command and what is at the EGR valve sensed by the EGR control pressure/BARO sensor, PCM makes minor adjustments to correct. DTC 44 will set when no ignition voltage is present on the EGR control circuit when EGR solenoid is commanded on. PCM will default to shut down the EGR.

1. This step determines if DTC 44 is the result of a hard failure or an intermittent condition.
2. This step checks if PCM and wiring are okay.
3. This step checks the EGR solenoid.