LEMON Manuals
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Toyota
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2003
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ECHO 2D Sedan, Standard
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Self Diagnostics
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Diagnostic Tests
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DTC P0121: Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem
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Possible Causes
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Possible Causes
Defective throttle position sensor.
Defective ECM.