What are the common causes of P044E?

EGR sensor C sending a signal that jumps around. A loose or corroded pin at the EGR sensor C connector. A chafed EGR sensor C wire rubbing through to ground. Carbon or water inside the EGR sensor C housing. A failing reference voltage feed to EGR sensor C.

Wiggle test the EGR sensor C harness while watching live data. Inspect the EGR sensor C connector for corrosion or water. Test the EGR sensor C reference and ground wires. Read EGR sensor C voltage and look for dropouts. Replace EGR sensor C if the signal stays erratic. Clear the code and retest.

P044E

EGR Sensor C Circuit Intermittent/Erratic

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P044E means EGR Sensor C Circuit Intermittent/Erratic.

Where it lives

For P044E, the sensor sits on the circuit this code reports. The description of P044E reports a fault at the sensor.

Check these first

EGR sensor C sending a signal that jumps around
A loose or corroded pin at the EGR sensor C connector
A chafed EGR sensor C wire rubbing through to ground
Carbon or water inside the EGR sensor C housing
A failing reference voltage feed to EGR sensor C

What to do next

Wiggle test the EGR sensor C harness while watching live data
Inspect the EGR sensor C connector for corrosion or water
Test the EGR sensor C reference and ground wires
Read EGR sensor C voltage and look for dropouts
Replace EGR sensor C if the signal stays erratic
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.