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P0137, P0157 HO2S2 EC-679 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE FOR USA AND CANADA] C D E F G H I J K L M A EC N P O 7. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%. “HO2S2 (B1)/(B2)” should be above 0.71V at least once when the “FUEL INJECTION” is +25%. “HO2S2 (B1)/(B2)” should be below 0.18V at least once when the “FUEL INJECTION” is −25%. CAUTION: • Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one. • Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant. Without CONSULT 1. Start engine and warm it up to the normal operating temperature. ground. 6. Check the voltage when revving up to 4,000 rpm under no load at least 10 times. (Depress and release accelerator pedal as soon as possible.) The voltage should be above 0.71V and below 0.18V at least once during this procedure. If the voltage can be confirmed at step 6, step 7 is not necessary. 7. Keep vehicle at idling for 10 minutes, then check voltage. Or check the voltage when coasting from 80 km/ h (50 MPH) in D position with “OD” OFF(A/T), 5th gear position (M/T). The voltage should be above 0.71V and below 0.18V at least once during this procedure. 8. If NG, replace heated oxygen sensor 2. Refer to . CAUTION: • Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one. • Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant. JSBIA1351GB |