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I own a 2006 Prius. I love the engine braking feature ("B" on the shifter) and use it frequently instead of the regular brakes to slow down for red lights and on the highway. A week ago, the car started to act like it is in medium "B" mode when the car is in "D" drive. Instead of coasting after taking off the gas, the car slows down at a faster than normal rate. It also requires pushing the pedal farther down/more gas to keep the car moving at a consistent speed. I took it to my local Toyota dealership and they told me the car "operates as designed," did a fuel induction/coolant flush and the problem is still there. Any ideas from the prius experts?
Thanks in advance.
I am having the same problem now on my 2005 Prius with 110,000 miles, did you ever find out how to fix this problem with engine spinning and very little acceleration?
I have a 2005 Prius with 110,000 mi. Sometimes when I accelerate the gas engine simply spins (as if the clutch was slipping in a convention car) and there is little acceleration and the gas engine doesn't shut off when coasting or braking as it always has in past. The battery screen shows it is not charging when this happens and is at 1 bar. then sometimes the hybrid battery guage will go from 1 bar to fully charged in under a minute or 2 and then show discharging just as fast which isn't possible. It goes away after a restart sometimes but then happpens again soon. Is it the TP sensor, Hybrid battery computer or ? I have gotten all kinds of codes including P0a93, P0a80, P1400, P040a. Does anyone know what is the problem and how to fix it?
Doing a quick search for those codes... P0a93 is for the inverter cooling system, P0a80 seems to be a code to replace hybrid battery pack, P1400 is about a voltage in the DPFE sensor (an emissions item, but still an electrical issue), and P040a is also an emission item. (EGR)
Throw in your description of little acceleration and you might have something going on in the emissions system, but I'm no auto tech so definitely get another opinion. All the codes seem related to electrical issues as well, so it might even be one issue somewhere throwing a gremlin in the works. But I'd bet it's a bit more complicated than that.