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Geely Emgrand X7. Manual part - 212
DTC P0420 Yes DTC code other than P0420 No
2 Start engine and turn on the fault diagnosis tester.
3 Keep the engine speed at 2,500 rpm for more than 2 min to warm up the engine, until ℃
4 (d) Select on the fault diagnosis tester: Engine/Read Data Flow/Group 1 Oxygen Group 1 Oxygen Sensor Voltage 2 (Rear oxygen sensor)
GC02-0330b 0V 0V 0V 0V 1V 1V 1V 1V
Whether front oxygen sensor and rear oxygen sensor signal voltage is matching Normal TWC in 5 Observe front oxygen sensor and rear oxygen sensor output voltages. Next Next No Refer to 2.2.7.14 DTC Chapter Index. Yes Normal TWC Front oxygen sensor Rear oxygen sensor Deteriorated TWC 847 |