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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 18 (Engine Control System - Diagnostic Codes (P0195-P0335)) >> SFI System >> DTC P0300-00: Random/Multiple Cylinder Misfire Detected; DTC P0300-27: Random/Multiple Cylinder Misfire Detected (Emission) Signal Rate of Change Above Threshold; DTC P0300-85: Random / Multiple Cylinder Misfire Detected (Over Temperature) Signal Above Allowable Range; DTC P0301-00: Cylinder 1 Misfire Detected; DTC P0302-00: Cylinder 2 Misfire Detected; DTC P0303-00: Cylinder 3 Misfire Detected; DTC P0304-00: Cylinder 4 Misfire Detected [08/2023 - ] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.
MISFIRE

Monitor runs whenever the following DTCs are not stored P0016 (VVT system - misalignment)
P0017 (Exhaust VVT system - misalignment)
P0101, P0102, P0103 (Mass air flow meter)
P0107, P0108 (Manifold absolute pressure)
P0112, P0113 (Intake air temperature sensor)
P0117, P0118 (Engine coolant temperature sensor)
P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor)
P0125 (Insufficient coolant temperature for closed loop fuel control)
P0327, P0328 (Knock control sensor)
P0335, P0337, P0338 (Crankshaft position sensor)
P0340, P0342, P0343 (Camshaft position sensor)
P0365, P0367, P0368 (Exhaust camshaft position sensor)
Auxiliary battery voltage 8 V or higher
VVT system Not operated by scan tool
Engine speed 6000 rpm or less
Either of the following conditions is met (a) or (b)
(a) Engine coolant temperature at engine start Higher than -7°C (19°F)
(b) Engine coolant temperature Higher than 20°C (68°F)
Fuel cut Off
MONITOR PERIOD OF EMISSION-RELATED MISFIRE (FOR THS-HEV MODEL)

First 1000 revolutions after engine start, or during check mode Crankshaft 1000 revolutions
Except above Crankshaft 1000 revolutions X 4
MONITOR PERIOD OF EMISSION-RELATED MISFIRE (FOR PHEV MODEL)

First 1000 revolutions after engine start, or during check mode Crankshaft 1000 revolutions
MONITOR PERIOD OF CATALYST-DAMAGING MISFIRE (MIL BLINKS)

All of the following conditions 1, 2, 3 and 4 are met Crankshaft 200 revolutions x 3
Except above (MIL blinks immediately) Crankshaft 200 revolutions
1. Driving cycles 1st
2. Check mode Off
3. Engine speed Less than 2430 rpm (for THS-HEV Model)
Less than 1980 rpm (for PHEV Model)
4. Engine load Less than 59% (for THS-HEV Model)
Less than 60% (for PHEV Model)
MISFIRE FOR MEXICO MODELS

Monitor runs whenever the following DTCs are not stored P0016 (VVT system - misalignment)
P0017 (Exhaust VVT system - misalignment)
P0102, P0103 (Mass air flow meter)
P0107, P0108 (Manifold absolute pressure)
P0112, P0113 (Intake air temperature sensor)
P0117, P0118 (Engine coolant temperature sensor)
P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor)
P0327, P0328 (Knock control sensor)
P0335, P0337, P0338 (Crankshaft position sensor)
P0340, P0342, P0343 (Camshaft position sensor)
P0365, P0367, P0368 (Exhaust camshaft position sensor)
Auxiliary battery voltage 8 V or higher
VVT system Not operated by scan tool
Engine speed Less than 6000 rpm
Engine coolant temperature Higher than 65°C (149°F)
Fuel cut Off
MONITOR PERIOD OF EMISSION-RELATED MISFIRE FOR MEXICO MODELS

First 1000 revolutions after engine start, or during check mode Crankshaft 1000 revolutions
Except above Crankshaft 1000 revolutions x 4
MONITOR PERIOD OF CATALYST-DAMAGING MISFIRE (MIL BLINKS) FOR MEXICO MODELS

MIL blinks immediately Crankshaft 200 revolutions x 3
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