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P0121 – 2003_TOYOTA_COROLLA

Code : P0121
Make : 2003_TOYOTA_COROLLA
Description : P0121 2003 TOYOTA COROLLA Throttle/Pedal Position Sensor/Switch ‘A’ Circuit Range/Performance 3ZZ-FE Engine
Possible causes :
– Faulty throttle position sensor
– Throttle position sensor harness is open or shorted
– Throttle position sensor circuit poor electrical connection
– Faulty Engine Control Module (ECM)
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

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