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What Causes A P0121 Code? [Solved]
When code P0121 occurs, it means that your Engine Control Module (ECM) recognized that your throttle position “A” circuit’s expected output voltage has either gone above or below the sensor’s expected range. When code P0121 is triggered, your ECM will go into failsafe mode.3 Mar 2022
Causes and Fixes P0121 Code Chevy Silverado
Quick overview of a
P0121 Throttle Postition Sensor troubleshooting tips
A tps can also act like a bad iac so one simple trick is to unplug it and see if it makes a difference. Throttle Position Sensor
DTC P0121 Overview: Throttle/Pedal Position Sensor/Switch “A” Circuit Range/Performance Problem
DTC
