P0128

DTC P0128: Coolant Thermostat




DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out with 2 persons, a driver and a tester, on a level road.

NOTE: Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Intake air temp.: 70 degrees C (158 degrees F) or less.
- Altitude (barometric pressure): 2500 m, 8202 ft or less (560 mmHg, 75 kPa or more)
- Engine coolant temp. at engine start: between -10 degrees C and 56 degrees C (14 degrees F and 133 degrees F)

1. With ignition switch turned OFF, connect scan tool to DLC.
2. Turn ON ignition switch and clear DTC using scan tool.
3. Start engine and drive vehicle in 40 - 60 km/h (25 - 40 mile/h) vehicle speed and 2000 - 3000 rpm engine speed for 20 minutes or more.
4. Stop vehicle and check DTC and pending DTC.

Step 1 - 2:

Step 3 - 6:

Step 7 - 8:

DTC Troubleshooting