Turbo Coupe Technical Articles Turbo Coupe Literature Contact
h23: Service Code 42/92: Fuel Control Always Rich: Check HEGO Signal for Short to Power
Steps _Key Off, wait 10 seconds
_Disconnect the appropriate HEGO sensor for Code 42/92
_DVOM on 20 volt scale
_Key On, Engine Off
_Measure voltage between HEGO Signal and PWR GND at the HEGO vehicle harness connector
Result Is voltage less than .5 volts?
Direction YES

GO to Continue


Reconnect HEGO sensor. Service HEGO circuit short to power. Rerun Quick Test

HEGO Information:
ComponentHeated Exhaust Gas Oxygen Sensor
DescriptionThe HEGO sensor supplies the EEC with a signal that indicates a rich or lean condition during engine operation.
LocationThreaded into the turbo outlet elbow
Wire ColorsDark Green with Purple stripe
Grey with Yellow stripe
Black with Light Green stripe