Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC 44, EGR Pulse Width Error: Notes
PCM operates the normally-open solenoid to control EGR valve. By providing a ground path, PCM energizes solenoid allowing vacuum to pass to EGR. During normal operation, 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 PCM command and what is at EGR valve sensed by EGR control pressure/BARO sensor, PCM makes minor adjustments to correct. DTC 44 will set when:
- Ignition voltage is present on the EGR control circuit when EGR solenoid is commanded on.
Or
- No ignition voltage is present on EGR control circuit when EGR solenoid is commanded off.
PCM will default to shut down EGR.
- This step determines if DTC 44 is result of a hard failure or an intermittent condition.
- This step checks if PCM and wiring are okay.
- This step checks voltage at EGR solenoid.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.