DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 52 (Engine Control System (A25A-FXS) - Diagnostic Codes (P0128-P0171)) >> SFI System >> DTC P0128-00: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature); DTC P0128-07: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) Mechanical Failure [12/2019 - 10/2022] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
ALL

Monitor runs whenever the following DTCs are not stored P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module)
P0011 (VVT system - advance)
P0012 (VVT system - retard)
P0013 (Exhaust VVT oil control solenoid)
P0014 (Exhaust VVT system - advance)
P0015 (Exhaust VVT system - retard)
P0016 (VVT system - misalignment)
P0017 (Exhaust VVT system - misalignment)
P0031, P0032, P101D (Air fuel ratio sensor (sensor 1) heater)
P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side))
P0101, P0102, P0103 (Mass air flow meter)
P0107, P0108 (Manifold absolute pressure)
P0111, P0112, P0113 (Intake air temperature sensor)
P0116, P0117, P0118 (Engine coolant temperature sensor)
P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor)
P014C, P014D, P015A, P015B, P2195, P2196, P2237, P2238, P2239, P2252, P2253 (Air fuel ratio sensor (sensor 1))
P0171, P0172 (Fuel system)
P0201, P0202, P0203, P0204, P062D, P21CF, P21D0, P21D1, P21D2 (Fuel injector)
P0300, P0301, P0302, P0303, P0304 (Misfire)
P0335, P0337, P0338 (Crankshaft position sensor)
P0340, P0342, P0343 (Camshaft position sensor)
P0365, P0367, P0368 (Exhaust camshaft position sensor)
P0400 (EGR system)
P0401 (EGR system (closed))
P0489, P0490 (EGR control circuit)
P059F, P05A0, P05A2, P05A3, P05A4, P05A5, P05B2, P05B3, P05B4, U0284, U1293, (Active grille air shutter)
P107B, P107C, P107D (Fuel pressure sensor (for low pressure side))
P11EA, P11EC, P11ED, P11EE, P11EF, P219A, P219C, P219D, P219E, P219F (Air-fuel ratio imbalance)
P1235 (High pressure fuel pump circuit)
JUDGMENT BY SIMULATED ENGINE COOLANT TEMPERATURE

Auxiliary battery voltage 11 V or higher
Either of the following conditions is met 1 or 2
1. All of the following conditions are met -
Engine coolant temperature at engine start - Intake air temperature at engine start -15 to 7°C (-27 to 12.6°F)
Engine coolant temperature at engine start -10 to 56°C (14 to 133°F)
Intake air temperature at engine start -10 to 56°C (14 to 133°F)
2. All of the following conditions are met -
Engine coolant temperature at engine start - Intake air temperature at engine start Higher than 7°C (12.6°F)
Engine coolant temperature at engine start 56°C (133°F) or less
Intake air temperature at engine start -10°C (14°F) or higher
Accumulated time that vehicle speed is 128 km/h (80 mph) or more Less than 20 seconds
JUDGMENT BY ENGINE COOLANT TEMPERATURE AND NO. 2 ENGINE COOLANT TEMPERATURE CHANGES

Auxiliary battery voltage 11 V or higher
Engine coolant temperature at first engine start -10°C (14°F) or higher
Target engine coolant flow by engine water pump 1.5 L/min or higher
Engine coolant temperature sensor malfunction (P0117, P0118) Not detected
No. 2 engine coolant temperature sensor malfunction (P00B3, P00B4) Not detected
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