P044E

Symptoms

• The Check Engine light is on (may go out and come back on)
• The code may be unstable - disappears and reappears
• Unstable operation of the EGR valve
• Increased NOx emissions
• Sometimes - rough operation of the engine under load
• Increased fuel consumption due to prolonged malfunction

Causes

• Poor contact in the EGR sensor connector C (oxidation, contact deformation)
• Frayed or broken wire with intermittent contact
• Incipient failure of the EGR valve position sensor C
• Vibration effect that periodically breaks the chain
• The connector is contaminated with oil or moisture
• Loose contact in the ECU connector

How to Fix

1. Read the codes and record the error conditions (heating, load, vibration)
2. Carefully inspect the EGR sensor connector C: check all contacts for oxidation and deformation
3. Check the wiring for bending: swing the harness with the engine running
4. Check the fastening of the connector - it should lock with a characteristic click.
5. Use an oscilloscope to monitor the sensor signal while driving
6. Replace the sensor or repair the wiring if a problem is detected
7. Reset the code and conduct a long test drive in different modes

Related codes

Error P044E by Vehicle Brand