DTC P0031: O2 Sensor 1/1 Heater Circuit Low & P0037: O2 Sensor 1/2 Heater Circuit Low: Notes

NOTE: For component location, see COMPONENT LOCATIONS . For connector identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see WIRING DIAGRAMS . In testing procedures Alpha/Numeric character in patientness i.e. (K4) designates circuit. After each repair procedure has been completed, reconnect all components. Perform POWERTRAIN VERIFICATION TEST VER-5 under VERIFICATION TESTS to ensure system is functioning properly.

The sensors are monitored for a low setting when the battery voltage is above 10.6 volts, ASD is powered up and O2 heater is on. DTC is set when desired state does not match actual state.