Code 71, EGR Temperature Sensor Circuit (CALIF. Only)

Code 71 indicates that EGR temperature sensor has signaled ECM of a temperature greater or less than calibrated range.

1. ECM should provide 4-5 volts to the EGR temperature sensor.
2. ECM provides ground for EGR temperature sensor.

Fig 1: Code 71 Schematic (Calif. Except GSi), EGR Temp. Sensor Ckt.

Fig 2: Code 71 Flow Chart (Calif. Except GSi), EGR Temp. Sensor Ckt.