Start by inspecting the connections of the harness to the body grounds.
You can try to clean the throttle body first before replacing anything. After clean or replacing the throttle body you will have to do an Idle Air Relearn and Throttle Valve Closed Position Learning
Idle Air Relearn
Throttle Valve Closed Position Learning
Check 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 pins.
The cost to diagnose the P1229 2006 Nissan Maxima code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The Engine Control Module (ECM) detects the voltage of the power source for the sensor is excessively low or high. The ECM stops the electric throttle control actuator control, and the throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return spring. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the voltage of the power source for the sensor is excessively low or high.
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Get the P1229 2006 Nissan Maxima code diagnosed by a professional: Find a repair shop in your area