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P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER EC-555 < COMPONENT DIAGNOSIS > [VQ40DE] C D E F G H I J K L M A EC N P O P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER Description INFOID:0000000005273510 SYSTEM DESCRIPTION The ECM performs ON/OFF duty control of the A/F sensor 1 heater corresponding to the engine operating On Board Diagnosis Logic INFOID:0000000005273511 DTC Confirmation Procedure INFOID:0000000005273512 NOTE: 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: Start engine and let it idle for at least 10 seconds. 2. Check 1st trip DTC. 3. If 1st trip DTC is detected, go to Diagnosis Procedure INFOID:0000000005273513 1. CHECK GROUND CONNECTIONS 1. Turn ignition switch OFF. Sensor Input Signal to ECM ECM function Actuator Camshaft position sensor (PHASE) Engine speed Air fuel ratio (A/F) sensor 1 Air fuel ratio (A/F) sensor 1 heater Mass air flow sensor Amount of intake air DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0031 Air fuel ratio (A/F) sensor The current amperage in the A/F sensor 1 heater • Harness or connectors (The A/F sensor 1 heater circuit is • A/F sensor 1 heater P0051 P0032 Air fuel ratio (A/F) sensor The current amperage in the A/F sensor 1 heater • Harness or connectors (The A/F sensor 1 heater circuit is • A/F sensor 1 heater P0052 |