Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
If no coolant leaks are present, replacing the thermostat usually takes care of the problem.
The cost to diagnose the P1126 2000 NISSAN ALTIMA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The P1126 Code is detected when the engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
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.
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