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DTC P0031, P0032, P0051, P0052 HO2S1 HEATER EC-703 [VG33E] C D E F G H I J K L M A EC DTC P0031, P0032, P0051, P0052 HO2S1 HEATER PFP:22690 Description UBS00DFM SYSTEM DESCRIPTION The ECM performs ON/OFF control of the heated oxygen sensor 1 heaters corresponding to the engine OPERATION CONSULT-II Reference Value in Data Monitor Mode UBS00DFN Specification data are reference values. On Board Diagnosis Logic UBS00DFO DTC Confirmation Procedure UBS00DFP NOTE: WITH CONSULT-II 1. Turn ignition switch ON and select “DATA MONITOR” mode with 2. Start engine and run it for at least 6 seconds at idle speed. 3. If 1st trip DTC is detected, go to EC-708, "Diagnostic Procedure" . Sensor Input Signal to ECM ECM function Actuator Camshaft position sensor Engine speed Heated oxygen sensor 1 Heated oxygen sensor 1 heaters Engine speed rpm Heated oxygen sensor 1 heaters Above 2,800 OFF Below 2,800 ON MONITOR ITEM CONDITION SPECIFICATION HO2S1 HTR (B1) ● Engine speed: Below 2,800 rpm ON ● Engine speed: Above 2,800 rpm OFF DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0031 Heated oxygen The current amperage in the heated oxygen ● Harness or connectors ● Heater oxygen sensor 1 heater P0051 P0032 Heated oxygen The current amperage in the heated oxygen ● Harness or connectors ● Heater oxygen sensor 1 heater P0052 SEF058Y |