Kia Sedona acceleration cuts out above 50 mph despite sensor and throttle body replacements on Kia Sedona

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Kia Sedona owners report experiencing persistent acceleration issues even after replacing the throttle body and throttle position sensor (TPS). These problems may stem from the new throttle body not functioning correctly or being incompatible with the vehicle model. Furthermore, if the TPS has been replaced, owners should verify that the new sensor is properly calibrated and effectively communicating with the engine control unit, as any issues here can lead to acceleration problems. Additionally, some owners find that inspecting the wiring between the TPS and the engine computer is crucial to rule out connectivity or wiring faults affecting throttle response. Understanding the type of throttle system in the Kia Sedona is also important, as failures in the drive-by-wire system can result in acceleration issues. Moreover, some Kia Sedona vehicles are known to face forced acceleration problems due to throttle malfunctions and sensor errors, making it essential to seek professional help for diagnosis and prompt resolution of these issues.

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