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Home >> Toyota >> 2003 >> Matrix Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Engine Control System Self Diagnostics) >> Diagnostic Tests >> DTC P0121: Throttle/Pedal Position Sensor/Switch Circuit Range/Performance >> Diagnosis & Repair
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Diagnosis & Repair

WARNING: This page is about a different car, the 2003 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Using Toyota hand-held tester or scan tool, read FREEZE FRAME data. Freeze frame data records engine conditions when malfunction is detected.

Check for any other DTCs. If other DTCs exists, diagnose and repair those DTCs first and then retest. If only DTC P0121 exists, replace TP sensor. For removal and installation of components, see REMOVAL & INSTALLATION - 4-CYLINDER article.

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