hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
160,000 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2001 Toyota Prius engine problems

engine problem

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2001 Toyota Prius Owner Comments

problem #1

Jan 312012


  • 160,000 miles


If the Prius engine does not start immediately when the computer tells it to, the computer stops trying to start it and leaves you with only the battery power...very dangerous when this happens in fast traffic or on an on-ramp. It can be restarted if one pulls off the road and shuts off the car and restarts it. After numerous incidents and attempts to determine the reason for the occasional non-starts, it turned out that the air intake flap in the engine can get dirty and stick, which causes the engine to sometimes take several tries to restart. (this was initially misdiagnosed as a computer problem, however that was not the cause.) besides making the flap cleaning part of maintenance, the computer should also be fixed so that it will attempt to restart the engine while the vehicle is being driven, since things could cause the engine to not start on the first try (such as sloshing from low gas.) I don't know if this is still a problem on newer priuses, however as more of them have high mileage, this can be expected to be more of a problem.

- Crofton, MD, USA

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