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Geely Emgrand X7. Manual part - 192
2.12.7.23 DTC P0135 1. DTC description: DTC P0135 Front oxygen sensor heater fails The pre-catalytic heated oxygen sensor (HO2S) is used for fuel control. The sensor compares the The front oxygen sensor heating coil voltage is provided by the main Relay, which is controlled by 2. Conditions For Setting DTC and The Fault Location: DTC DTC Detection Conditions For Setting The Fault Locations P0135 Hardware Circuit 1. Engine Running Longer than 60 s. 2. At idle Running Condition. 3. Pre-Catalytic Oxygen Sensor Heating 4. Pre-Catalytic Oxygen Sensor Heating Control 5. Duration Less Than 20s. 1. Sensor Circuit 2. Sensor 3. ECM. 3. Circuit sketch Refer to 2.12.7.22 DTC P0131 P0132 P0133 P0134. 4. Diagnostic Steps: Note: Before carrying out this diagnosis step, observe the data list on fault diagnosis tester and Step 1
Initial Inspection Inspect the existence of following factors that will affect the heated type oxygen sensor working (a) Exhaust system leakage or blockage. (b) Water enters into the heated oxygen sensor connector. (c) After engine working in high temperature, whether exhaust pipes are too hot or not. 767 |