Trouble Code P0121 overview

This page collects available information about Trouble Code P0121 and organizes it in an easy-to-read reference format.

Key information

Think your car's throttle has a mind of its own? Could a bad throttle position sensor (TPS) be to blame for limp mode, rough idling, ...

In this video I have a Jaguar XK8 that intermittently will go into fail-safe mode. This usually happens when i hit a bump and also ...

Context and analysis

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