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Home >> Lexus >> 2003 >> LS 430 >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 118 (Engine Control System Self Diagnostics) >> Diagnostic Tests >> DTC P0121: Throttle/Pedal Position Sensor/Switch "A"Circuit Range/Performance Problem >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2003 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set after vehicle speed has exceeded 19 MPH once and TP sensor output voltage is out of range while vehicle speed is 0-19 MPH. Possible cause is defective TP sensor.