DTC P0031: Ho2S Heater Control Circuit Low Current (Bank 1, Upstream 1): Notes

NOTE: Bank 1 is located on right side of engine and may be referred to as Bank "A". Bank 2 is located on left side of engine and may be referred to as Bank "B". Early production vehicles have wire color codes that may be different. If wire color codes are different, use connector pin numbers for wire identification. See WIRING DIAGRAMS .

NOTE: After each repair, clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES/ECM RESET PROCEDURE under SELF-DIAGNOSTIC SYSTEM. Turn ignition off and then on. Read DTCs to verify repair is complete. For DLC and ECM connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams and all other terminal identification, see WIRING DIAGRAMS .