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What does the p0121 code indicate on a Chevy Silverado?
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★ Top Answer
When a Chevy Silverado shows the p0121 error code, it often points to a problem with the throttle position sensor. This code is activated when there are difficulties or a total breakdown in transmitting data to the Powertrain Control Module (PCM) through the throttle sensor. Typically, the throttle sensor sends messages through its A circuit, indicating a possible electrical problem within the circuit. The exact impact on your vehicle is uncertain without a full diagnostic test. If you notice frequent engine failure or stiffness while idling, it could mean the throttle sensor has fully malfunctioned. Therefore, it's wise to address any TPS issues promptly.
More answers
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Code P0121 is triggered when the powertrain control module (PCM) receives illogical information from the throttle or pedal sensor/switch "A" circuit.
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The error code p0121 in a Chevy Silverado indicates that the throttle position sensor has identified a problem.
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