EGR Temperature Sensor: Testing and Inspection

EGR Gas Temperature Sensor Schematic:

A faulty EGR gas temperature sensor will set code 55 in the on-board diagnostic system. Refer to the schematic diagram and test the sensor with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

EGR Gas Temperature Sensor Diagnostic Chart (a):

EGR Gas Temperature Sensor Diagnostic Chart (b):

EGR GAS TEMPERATURE SENSOR DIAGNOSTIC CHART