Air Temperature Sensor ( Ambient / Intake ): Testing and Inspection
DESCRIPTIONA failure in the Manifold Air Temperature (MAT) sensor circuit should set either a Code 23 or Code 25. Once a trouble code is set, the Electronic Control Module (ECM) will use a default valve for MAT.
Refer to Computers and Controls / System Diagnosis / Procedures / Diagnostic Charts / Code 23 or 25. Testing and Inspection