Question

2001 Nissan Frontier XE 2.4L with engine code P1126, where is the throttle control motor relay located?

Answer 1

Actuallyon this engine and year this code is for the engine coolant temp. Chances are the truck needs a new temp sensor or possibly a water pump.

Answer 2

The code P1126 for 2000-2001 Nissan modes is Thermostat Function

The thermostat is the most likely cause of the problem.

P1126 NISSAN - Thermostat Function
Read more: https://www.autocodes.com/p1126_nissan-2.html