What are the common causes of P044B?

A failed EGR sensor C. An erratic sensor C signal. Corrosion at the sensor C connector. A restricted EGR passage skewing the signal. An ECM fault on the sensor C circuit.

Compare the sensor C reading against the commanded EGR position. Inspect the sensor C connector for corrosion. Check the EGR passages for a restriction. Verify the sensor C is the correct part. Replace sensor C if the reading stays off. Clear the code and retest.

P044B

EGR Sensor C Circuit Range/Performance

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

What it means

P044B means EGR Sensor C Circuit Range/Performance.

Where it lives

For P044B, the part to look at first is the sensor named here.

Check these first

A failed EGR sensor C
An erratic sensor C signal
Corrosion at the sensor C connector
A restricted EGR passage skewing the signal
An ECM fault on the sensor C circuit

What to do next

Compare the sensor C reading against the commanded EGR position
Inspect the sensor C connector for corrosion
Check the EGR passages for a restriction
Verify the sensor C is the correct part
Replace sensor C if the reading stays off
Clear the code and retest

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Updated

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