Operation CHARM: Car repair manuals for everyone.

P0121

DTC P0121: TP Lower Than Expected

1. Turn the ignition switch ON (II).
2. Check the throttle position with the scan tool.

Is 12.1 % or higher indicated when the throttle is fully opened?

YES - Intermittent failure, system is OK at this time.

NO - Replace the throttle body (The TP sensor is not available separately).