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Home >> Hyundai >> 2004 >> Tiburon Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System (2.0L) >> DTC Troubleshooting Procedures >> DTC P0121: Throttle Position Sensor Circuit Range/Performance Problem >> Signal Waveform
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Signal Waveform

Fig 1: Signal Waveform
G00893284Courtesy of HYUNDAI MOTOR CO.

During acceleration, the TPS output voltage increases; during deceleration, the TPS output voltage decreases. As much as possible, TPS signal should be compared with the MAFS signal. And check whether TPS and MAFS signals are increased at the same time when accelerated.