definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
20,077 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.

2012 Toyota Prius fuel system problems

fuel system problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2012 Toyota Prius:

Unsubscribe any time. We don't sell/share your email.

2012 Toyota Prius Owner Comments

problem #4

Apr 092016


  • 31,703 miles


I was driving the 2012 Prius on a downhill parkway at about 40 mph when the warning light check hybrid system came on. Within 10 second, the vehicle totally lost power. It automatically shifted into neutral. There was no back up fail-safe/limp home mode. Fortunately the car was gliding downhill by gravity and eventually was steered into a driveway. Then it refused to go on ready or drive mode. On this Saturday afternoon the car had to be towed home. It had to be towed again to the dealership for service the following week. It took the mechanic two days to make a diagnosis that a fuse on the main drive battery had blown. Another day was spent waiting for the part. The dealership cannot guarantee that this event will not happen again. I contacted Toyota usa. An agent named michael was courteous enough to listened to me and gave me a case number 1604142245. To anyone with common sense, this total lack of an emergency alternative propulsion system for even a cheap car is unacceptable. The dealership cannot even come up with a plausible explanation as to what may have caused the fuse to blow. Was it over heating" was there a short in some internal battery cells" this past week, I noticed that the charging part of the operation no longer can fully charge the battery to the former 11.9 mile range. It only charges up to 9.8 miles. This is a sudden loss of 2 miles of charge. I suspect that some lithium cells have been damaged after the incident. I also suspect that there may be other issues as well such as something wrong with the inverter module related to a recall on other models of Prius during my search for an answer. I need assurance from someone that this vehicle is now safe to drive. Besides the case number from my complaint to Toyota usa, aaa has record of my recent towings on 04/09/16 and on 04/12/16.

- La Jolla, CA, USA

problem #3

May 202015


  • 20,500 miles
I was stopped at a red light on a hill. When the light turned green, I stepped on the gas with no response. The car slid back and I braked. The panel light affirmed that the car was supposed to be in drive. Yet there was no response at all. The car seemed to be in neutral. I put the blinkers on and the cars behind me passed. The panel lights and radio were on along with the blinkers. I turned the ignition off and then turned it on again. It worked without a problem. I called the dealer who stated he had no idea what happened and there was nothing he could check. I have driven the car to various hill tops and stopped. The problem did not repeat itself. Is this car safe to drive" is there a way to evaluate the transmission"

- Berkeley, CA, USA

problem #2

Jan 092013


  • 15,000 miles
The contact owns a 2012 Toyota Prius. The contact stated that whenever he made a U-turn, the vehicle made a loud noise. The vehicle was taken to the dealer. The technician diagnosed that the fuel sending unit needed to be replaced. The manufacturer was not made aware of the failure. The vehicle was repaired. The VIN was not available. The failure mileage was 15,000 and the current mileage was 16,400.

- Norwalk, CA, USA

problem #1

Sep 262012

Prius 4-cyl

  • 13,104 miles
Fuel indicator on the dash showed 3 bars for remaining fuel. Vehicle ran out of fuel despite showing 3 bars. Oftentimes after tank is filled it only illuminates to 1 or 2 under the top bar instead of showing a full tank. There is obviously a problem that the car is not accurately reporting the fuel level.

- Washington, UT, USA

Search CarComplaints.com for these popular complaint phrases...

Not what you are looking for?