p0121 code - help

[nicholas]

Hi Everyone

I need help with a code my engine keeps throwing - p0121 - throttle position sensor.
1 month ago my car threw this code, but was driving fine, nothing out of the ordinary. We have a trip coming up so I decided to replace the throttle body and tps, didn't want an problems on the trip.
Two weeks the car was fine and now the code has come back - I have check the connections and the voltage on both TPS's everything is fine - I am stumped\

Car is a 2008 Nissan Versa - and driving fine - no idle stumble or accel issues.

Is there anything else I should check?

Thanks
Nick

 

[Quest]

should still be within new car power train warranty, no?

Get dealership to look into this instead.

Q.

 

[OilNerd]

Originally Posted By: Quest
should still be within new car power train warranty, no? Get dealership to look into this instead. Q.


+1 on the warranty service, if available. If not...

My Altima manual (w/Versa, YMMV) lists three conditions the code is thrown, and possible causes:

Code:
A) An excessively low or high voltage from the sensor is sent to the ECM.



* Harness or connectors (the TPS circuit is open or shorted)

* TPS



B) A high voltage from the sensor is sent to the ECM under light load driving condition.



* Harness or connectors (the TPS circuit is open or shorted)

* TPS

* Fuel Injector

* Camshaft position sensor

* Mass airflow sensor



C) A low voltage from the sensor is sent to the ECM under heavy load driving condition.



* Harness or connectors (the TPS circuit is open or shorted)

* Intake air leaks

* TPS

 

[nicholas]

No luck with the warranty - still driving me nuts - I may need to bite the bullet and take er in.