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11.4 Front Oxygen Sensor Failure Failure codes: P0130, P0131, P0132, P0134, P0135 No. Operating steps Result Follow up steps 1 Put the ignition switch to “ON”.
Next step Yes Next step 2 Pull off the connector of harness of oxygen sensor. Check the voltage between pin 1# (+) and 2# (-) with multimeter and detect if it is around 12V. No 4 Yes Replace ECU 3 Use a multimeter to check if the resistance value between 1# and 2# pins of the oxygen sensor is between 2Ω and 5Ω at 23 . ℃ No Replace the sensor Yes Next step 4 Check if heating circuit of the oxygen sensor is normal.
No Check the circuit Yes Repair or replace harness 5 Check if it is short circuit or break circuit between the pin 2# of oxygen sensor and main relay 87# pin and between the sensor connector 1# pin and ECU 1# pin with multimeter. No Next step 6 Connect the oxygen sensor connector of harness and use neutral. Start the engine and leave it at idle speed until its coolant temperature reaches to the normal value.
Next step Yes Next step 7 Pull off the oxygen sensor connector of harness. Check the battery output voltage between pin 3# (+) and pin 4# (-) of the sensor with multimeter and detect if it is from 0.1 to 0.9V (after the engine warms up). No Replace the sensor Yes Repair or replace harness 8 Connect the adaptor between ECU and harness. Check if it is short circuit or break circuit between the pin 36# and pin 13# of ECU and the sensor connector pin 3# and pin 4# respectively with multimeter. No Replace ECU 9 Plug in the oxygen sensor connector of harness and use neutral. Start the engine and leave it at idle speed until its coolant temperature reaches to the normal value.
Next step Yes Next step 10 Connect special diagnostic tester for Chery to read part of data stream of the engine, and then observe if part of data stream of the sensor fluctuates between 100mv and 900mv. No Replace the sensor 11 Start the engine and let it run at idle speed until coolant temperature reaches normal value.
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