2003 Toyota Prius Repair Question
Topics covered: Dealer, Check engine light, Engine.
Mileage: 158,013 miles.
Mileage: 158,013 miles.
Asked on November 28, 2011
What causes codes P0300, P0301, P0303, P0304 on 2003 Prius
The car will run fine for 10 to 20 minutes then the check engine light comes on & it starts to vibrate. Had it checked for codes got: P0300, P0301, P0303, & P0304. Changed plugs & checked coils. Still has the same problem. Sprayed cleaner on MAF & reinstalled with the same results. Took to a local garage & they couldn't figure out what was wrong either & recommended I take to dealership problem is dealership is about 45 mile away & I'm afraid to go that far in it as the vibration gets worse the longer it is on.
Asked by KSkipperAnswer
Replied on November 28, 2011
Have you checked fuel pressure?
Replied on November 29, 2011
No I assumed that the garage did though. Will have to check to see how it is done. I know that they disconnected one of the coils & it started running fine but don't know if it would have continued to do so. Was a little cooler today & I was able to go for 30 minutes without it starting to misfire.
Replied on November 29, 2011
That sounds electrical. But, the fuel pump is electric too. Also, I have seen crank sensors do this when they get hot.