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in fail-safe mode. Fail-safe mode continues until the ignition switch is turned off. The ECM provides a pulse width modulated control circuit to adjust the current through the heater. The Fig. 51: Air-Fuel Ratio Sensor - Circuit Diagram DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART HINT: Bank 1 refers to the bank that includes No. 1 cylinder. Bank 2 refers to the bank that does not include No. 1 cylinder. Sensor 1 refers to the sensor closest to the engine assembly. Sensor 2 refers to the sensor farthest away from the engine assembly. MONITOR DESCRIPTION The ECM uses information from the Air-Fuel Ratio (A/F) sensor to regulate the air-fuel ratio and keep it close DTC DTC Detection Condition Trouble Area P0031 Air-Fuel Ratio (A/F) sensor heater Open in A/F sensor heater A/F sensor heater (for Sensor Integration relay ECM P0032 Air-Fuel Ratio (A/F) sensor heater Short in A/F sensor heater A/F sensor heater (for Sensor Integration relay ECM
2009 Toyota Tundra 2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
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