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P1126 NISSAN - Thermostat Function

Possible causes
- Low engine coolant level
- Faulty Thermostat
- Leakage from sealing portion of thermostat
- Engine coolant temperature sensor
Tech notes
If no coolant leaks are present, replacing the thermostat usually takes care of the problem.

For Nissan vehicles other than the 2000-2001 models see: P1126 Nissan
When is the code detected?
The P1126 Code is detected when the engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1126 Nissan Description

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 open stuck.

Thermostat Function is for 2000-2001 Nissan models.

P1126 Nissan Information for specific Nissan models
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