DETROIT — The U.S. government's auto safety agency has rejected a request to investigate unintended acceleration in Tesla electric vehicles, saying the acceleration was caused by drivers pushing the wrong pedal.

Brian Sparks of Berkeley, California, petitioned the National Highway Traffic Safety Administration in December of 2019 asking for an investigation. At the time the government had 127 owner complaints including 110 crashes and 52 injuries.

But on Friday, the agency said in documents that it did not find evidence to support opening an investigation. It said that in every case with data available for review, evidence showed the problem was caused by pedal misapplication.

The agency says there is no evidence of any fault in Tesla's accelerator pedal assemblies, motor control systems or brake systems in any of the incidents.

NHTSA says it is unlikely that an investigation would result in a recall.

Efforts to reach Sparks have been unsuccessful.

In documents posted Friday, NHTSA said Sparks later cited a total of 232 complaints about unintended acceleration, with the agency finding another 14. The agency said its review included analysis of event data recorder, Tesla log data and video data that it acquired during its evaluation.

The agency also wrote that there is no evidence of design factors that make it more likely for Tesla drivers to push the accelerator rather than the brake.

The petition alleged that there was a possible electronic cause for the sudden unintended acceleration, but NHTSA said it could not substantiate that. "The theory provided of a potential electronic cause of SUA in the subject vehicles is based upon inaccurate assumptions about system design and log data," the agency said.

NHTSA's initial evaluation covered more than 662,000 Tesla Model S, X, 3 and Y vehicles from the 2012 through 2020 model years.

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This story has been corrected to show that the petition seeking an investigation was filed in December of 2019. An inquiry was opened in January of 2020.