Code 25, Mat Sensor Temp. High - 1992 2.5L & 4.3L Turbo: Notes

Fig 1: Code 25, MAT Sensor Circuit Diagram (1992 2.5L & 4.3L Turbo)

Courtesy of GENERAL MOTORS CORP.

NOTE: Test numbers refer to test numbers on diagnostic chart.

1. Code 25 will set if signal voltage indicates a intake air temperature above 302° for 2 seconds, time since engine start is one minute or longer or vehicle speed signal is present.