Engine light - code P0121


Asked by Jan 20, 2017 at 07:45 PM about the 2004 Kia Spectra LS

Question type: Maintenance & Repair

Hello ,
My  check engine light  just came on today.
I went to PepBoys and got a free check for
the Code, but that is as far as free will go.
Is there anybody here willing to help out
with their knowledge and past experience?

The code was P0121, and it said the word  
'throttle' on the display...
What does that mean and what do I need
to check ?

Thank you in advance ,

2 Answers


Try this link on youtube. https://www.youtube.com/watch?v=jtNtJSFd_mg

1 people found this helpful.

Replace the Throttle Positioning Sensor, and check the wiring harness for broke wires at the plugin into the TPS...... P0121 KIA - Throttle Position Sensor Circuit Range/Performance Problem... Possible causes; Faulty throttle position sensor, Throttle position sensor harness is open or shorted, Throttle position sensor circuit poor electrical connection, Faulty Engine Control Module (ECM)....

2 people found this helpful.

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