P1126

DIAGNOSTIC LOGIC
Even though the engine has been driven sufficiently to raise the engine coolant temperature, the engine coolant temperature is not raised to the specified temperature due to the thermostat having a leaking seal or being stuck open.

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

NOTE: If "DTC CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
- For best results, perform at ambient temperature of -10°C (14°F) or higher.
- For best results, perform at engine coolant temperature of -10°C to 60°C (14 to 140°F).




With Consult
1. Replace the thermostat with a new one. Refer to "Thermostat", "ENGINE COOLING SYSTEM". Use only a genuine NISSAN thermostat as a replacement. If an incorrect thermostat is used, the MIL may come on.
2. Turn ignition switch "ON".
3. Select "COOLANT TEMP/S" in data monitor mode with CONSULT-II.
4. Check that the "COOLANT TEMP/S" is above 60°C (140°F).
If it is below 60°C (140°F), go to the following step. If it is above 60°C (140°F), stop engine and cool down the engine to less than 60°C (140°F), then retry from step 2.
5. Drive vehicle for 10 consecutive minutes in the following conditions.
VHCL SPEED SE: 80 kph to 120 kph (75 MPH)
If 1st trip DTC is detected, CHECK COMPONENT INSPECTION of ENGINE COOLANT TEMPERATURE SENSOR.

OR

With Generic Scan Tools
1. Follow the above procedure "With CONSULT-II".