Typical Enabling Conditions

Monitor runs whenever following DTCs are not present

P0011 (VVT System 1 - Advance)

P0012 (VVT System 1 - Retard)

P0031, P0032 (A/F Sensor heater - Sensor 1)

P0037, P0038 (O2 Sensor heater - Sensor 2)

P0100 - P0103 (MAF meter)

P0115 - P0118 (ECT sensor)

P0120 - P0223, P2135 (TP sensor)

P0125 (Insufficient ECT for Closed Loop)

P0136 (O2 Sensor - Sensor 2)

P0171, P0172 (Fuel system)

P0300 - P0304 (Misfire)

P0335 (CKP sensor)

P0340 (CMP sensor)

P0351 - P0354 (Igniter)

P0500 (VSS)

P2196 (A/F Sensor - rationality) P2A00 (A/F Sensor - slow response)

Battery voltage

11 V or more

Intake air temperature

-10°C (14°F) or more

Engine coolant temperature

75°C (167°F) or more

Atmospheric pressure

76 kPa (570 mmHg) or more



Engine RPM

Less than 4,000 rpm

A/F sensor status


Fuel system status

Closed loop

Engine load

10 to 80 %

All of the following conditions (a), (b) and (c) are met


(a) Mass air flow rate

2.5 to 50 g/sec.

(b) Estimated front catalyst temperature

650 to 840°C (1,202 to 1,544°F)

(c) Estimated rear catalyst temperature

400 to 770°C (752 to 1,418°F)

Rear HO2 sensor heater monitor


Shift position

4th (Automatic transaxle) 3rd or higher (Manual transaxle)

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