Nissan Altima 2007-2012 Service Manual: P0128 Thermostat function

DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P0128 is displayed with DTC P0300, P0301, P0302, P0303 or P0304, first perform the trouble diagnosis for DTC P0300, P0301, P0302, P0303, P0304. Refer to EC-776, "DTC Logic".

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough.

This is due to a leak in the seal or the thermostat stuck open.

DTC CONFIRMATION PROCEDURE


DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:

    P0127 IAT Sensor
    Description The intake air temperature sensor is built-into mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM. The temperature sensing unit u ...

    P0130 A/F Sensor 1
    Description The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sensor. The sensor element of the A/F sensor 1 is composed an electrode layer, which transports ions. It has a he ...

    Other materials:

    Operating tips
    ● When the engine coolant temperature and outside air temperature are low, the air flow from the foot outlets may not operate for a maximum of 150 seconds. However, this is not a malfunction. After the coolant temperature warms up, air flow from the foot outlets will operate normally. ...

    Automatic door locks
    ● All doors lock automatically when the vehicle speed reaches 15 MPH (24 km/h). ● All doors unlock automatically when the ignition is placed in the OFF position. The automatic unlock function can be deactivated or activated. To deactivate or activate the automatic door unlock sys ...

    P0826 manual mode switch
    Description Manual mode switch is installed in shift control device. The manual mode switch sends shift up and shift down switch signals to TCM with CAN communication. TCM sends the switch signals to combination meter via CAN communication line. Then manual mode switch position is indicat ...