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P0130, P0150 A/F SENSOR 1 EC-205 < DTC/CIRCUIT DIAGNOSIS > [VK56DE] C D E F G H I J K L M A EC N P O P0130, P0150 A/F SENSOR 1 Component Description INFOID:0000000009886614 The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen- sor. The sensor element of the A/F sensor 1 is composed an elec- trode layer, which transports ions. It has a heater in the element. lean and rich range. Together with its control electronics, the sensor The exhaust gas components diffuse through the diffusion layer at the sensor cell. An electrode layer is applied voltage, and this current relative oxygen density in lean. Also this current relative hydrocar- bon density in rich. Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this electrode layer of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of about 800 °C (1,472 °F). On Board Diagnosis Logic INFOID:0000000009886615 To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal fluctuates according to fuel feedback control. DTC Confirmation Procedure INFOID:0000000009886616 Perform PROCEDURE FOR MALFUNCTION A first. If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B. NOTE: If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- ing the next step. Before performing the following procedure, confirm that battery voltage is more than 11V at idle. PROCEDURE FOR MALFUNCTION A 1. Start engine and warm it up to normal operating temperature. 2. Let engine idle for 2 minutes. 3. Check 1st trip DTC. 4. If 1st trip DTC is detected, go to PBIB3353E JPBIA5446GB DTC No. Trouble diagnosis name DTC detecting condition Possible Cause P0130 Air fuel ratio (A/F) sensor 1 A) The A/F signal computed by ECM from the A/F • Harness or connectors (The A/F sensor 1 circuit is open • Air fuel ratio (A/F) sensor 1 P0150 B) The A/F signal computed by ECM from the A/F |