Prius C :: MPG Dropped, Engine Would Come On In Idle


Jun 24, 2013

My Father In Law bought a 2012 Prius C last year in Houston, they are from El Paso. The car drove great for many months, he takes the same path to work and same speed every day and was consistently getting over 60 mpg. All of a sudden winter came and he lost MPG and the engine would come on more often, even while parked. I own a 2009 Prius and told him mine did that too during the winter, because for some reason, during winter the battery drains while parked and the engine comes on to charge.

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Prius V :: Oil Level Dropped - Engine Topped Off On The Dipstick

Up until my last oil change at 105,000 miles, I didn't notice any oil usage. When draining my oil, it didn't look like it was quite 4 quarts. After the oil change, I ensured that I had the engine EXACTLY topped off to the upper mark on the dipstick. Around 600 miles later, I parked in the same location and have noticed that the oil level has dropped enough to notice.

I am guessing that I will lose well over a quart between oil changes. Before I resign to the normal mechanical reasons (rings, cylinder wear, etc.), The loss doesn't seem to be gradual which has me looking for other explanations. I also had a Toyota mechanic go over the car and replace the other fluids and filters at 100,000 miles (coincidence I think ).

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Prius (Gen 2) :: 2005 Hybrid Battery Installed, Engine Code 2102 / Bars Dropped

I just bought 05 prius from a dealer I don't know the history was told all it needed was a hybrid battery.

Now I have a 05 that I drive with known good parts so I pulled my hybrid battery and installed it in the new car the monitor showed engine charging inverter then going to the battery. However the bars on the battery graph start dropping. only code is a engine code 2102.

I also noticed the old A/C condenser in the back.

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Camry :: 05 - High Idle Stuck On Then After About An Hour Gradually Dropped To Normal

I have a problem with my Camry 170k on the clock. Took it out a few nights back and the high idle was stuck on, after about an hour the idle gradually dropped to normal.

The next night it would not start and run unless I keep the accelerator pedal pressed slightly, after warming up it seems to run fine, The high idle has not returned

I have seen a few suggestion on cleaning the iac valve with Carbie cleaner, so I tried that and it made no difference.

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Corolla / Matrix 2009-13 :: Rough Idle With Headlights And AC Off - RPMs Dropped

I have a 2010 corolla s and I started to notice that when I was at red lights with the car in drive my rpm's would drop to around 600 but it would only do it randomly, or so i thought until one day I was at a light and turned the ac on and my rpm's went back up to 800 so I turned it off and the rpm's dropped again, turned on the headlights and they went back up.

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Prius (Gen 3) :: Voltage Dropped To 12.4V

On my battery poles I measure like 12.8v, my scangauge reports around 12.4v/. I have an additional voltmeter connected to the cigarette lighter cables & same thing there: 12.4v. The voltage go down soooo much. My first thought was that my battery is not getting fully charged, but after measuring directly at the poles, it's obvious that the voltage drop happens on the way.

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Prius (Gen 1) :: MPG Dropped After Some Maintenance

My 2007 Prius has about 105,000 miles on it. For awhile I was getting around 41-42 MPG which I thought was a bit on the low side, but the dealership never found any problems. I had the recommended 60k service done then after that stopped going to dealer for routine maintenance like oil changes and such. Lately though, my MPG has dropped to around 37. I use Chevron gas all of the time and I keep up with my oil changes. I try to also make sure my tires are inflated properly.

They had a special on oil changes at the dealer so I asked them what they thought might account for the drop in mileage. Their initial thought was cleaning out the fuel injectors. I do change my own air and cabin air filters.

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Prius (Gen 3) Fuel :: Mileage Has Dropped To 35 MPG

2011 Prius for wife. Mileage has always been upper 40s to low 50s until the last week or so, now she is seeing 35 mpg displayed.

I have asked for a check at fill up. I just pulled the car out to wash it and noticed the engine came on right away, same when I put it back into the garage. In the past we would get part way down the driveway before the engine came on. Also did a code check and no codes found

What are the approximate outside air temps? 40s am 70s pm.

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Prius (Gen 3) Fuel :: MPG Suddenly Dropped

Well I shouldn't say MPG since we canadians use L/100km.

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Prius (Gen 2) :: Code P0505 - MPG Dropped To 31

The engine light went on and I took it to my mechanics who is good on everything except Hybrid system.

Immediate after the lights on, I filled gas and the mpg dropped to 31, soon back to 37 on a hot day 85 degree. At red light, I feel the engine still running, not very smoothly. But the next day, it back to normal, mpg also back to 48 something.

My friend has a 2005 with 140K also got the same code. His mpg dropped to 40 and feel that engine power is lower now.

I would like to know if this is a common problem, what's the most probable cause, and if there are many possibilities, what's the best way to approach.

Here is problem area by OBD-II:

Engine and ECT

Hybrid Control

ABS/VSC/TRC

Air Conditioner

Immobiliser

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Prius V :: Mileage Appears To Be Dropped Without Any Cause

We recently got back from a 2800 mile trip. Our v now has 10,600 miles on it. We have been averaging 41 mpg until the last two tank fuls. For some strange reason we got 34.5 displayed on our last tank, 32 actual, and right now after 90 miles we are showing 30.5 displayed. My wife drives the car 98% of the time, but even when I use hypermiling techniques the car is not yielding the past displayed results. We are about to take it in for the 10,000 oil change.

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Prius C Fuel :: Mileage Dropped From 45 To 40 Mpg

I've had my car going at 45 mpg the past 2 years. I just hit my 45k mileage mark. I drive mostly on the highway to work so getting 45 mpg is pretty good for me. This last few fill ups, I noticed my gas mileage has gone down to 40 mpg. I thought it was a mistake if it was just once but the last 7 fill ups has been that way. It just went down all of a sudden and has stayed that way.

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Prius (2010-12) :: MPG Dropped From 55 To 45 After Service

so I recently had my 2012 Prius in for oil, tires and alignment. I was getting 55mpg all day and now I can't keep over 45mpg. Tire press is 38 all around with Goodyear assurance. Could the alignment be off causing higher rolling resistance. Maybe wrong oil.

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Lexus IS 2014+ :: Clip On Top Of Radiator Dropped Into Engine Bay?

I don't know if this is a minor issue or if it may be a actual problem. But basically I was showing the engine bay to a friend, and being the genius he is, he unclipped one of the clips that covers the top of the radiators and dropped it accidentally into the engine bay . Being my first car I really don't know if this will affect my car somehow if it gets into the wrong valve or what not.

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Prius C Fuel :: Millage Dropped Drastically

I have Prius 2010 and I was getting 20 km/l to 22 km/l until I repaired the part which is between two tires and when you revolve your steering it revolve due to that rod. Right after I drive my car as I came out of workshop, it seems that my engine keep running more and turn off less.

1- Can I check if my Hybrid battery is getting weak or what is the health of my hybrid battery ?

2- Is there any way if I can check my front tires are revolving without any friction and revolving freely ?

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Prius (2004-09) :: Mileage Dropped After Oil Change

I have an 05 Prius that I bought used. It has 59K miles on it. Recently I took it to the dealer for an oil change. They told me it didn't need an oil change, but did need an air filter. Afterwards, the mileage dropped from about 47 around town to about 42. Had the oil changed a week later, and the mileage is now about 40 around town. The dipstick when cold shows a little above the full mark.

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Prius (2004-09) :: HV Battery Dropped At 2 Bars

So I met my wife after work. I was killing some time with my son. We drove across the street, then to a neighboring shopping center. I changed the display to see the more accurate instant MPG and noticed my battery was at 2 bars. This is the first time that's happened, that I'm aware of. During normal operation, it stays at 2 bars above the halfway mark, or above.

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Prius (2004-09) :: MPG Dropped Over 10 Miles Per Gallon

We picked up our 2009 prius about a month ago from a local dealer. At the time it was getting about 52 miles per gallon. Since then, we have driven about 1000 miles and now we are getting only about 41 miles per gallon. Are we doing something wrong that made the MPG drop over 10 miles per gallon.

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Passat (B6) :: Thin Wire Dropped To The Left Bottom Of Engine Bay?

Accidentally dropped a thin wire to the left bottom of the engine bay, Will this cause any harm to the engine?

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Prius (Gen 2) :: Blue Bars Dropped After Only 3 Miles Drive

My neighbor stopped me this morning saying her 2005 prius was acting up.

When we started off the MFD was showing all blue bars, ac lights radio all turned off.

Drove less than 3 blocks and it dropped to one purple bar and had hesitation on acceleration.

Went around the neighborhood about 3 miles and it was showing full charge green , parked and restarted, it dropped to all blue bars.

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Prius (Gen 3) Fuel :: Mileage Has Dropped Significantly To High 20s / Low 30s

The last few days with snow and temps dipping below, my mileage has dropped significantly to high 20s/low 30s. I understand that (a) I park my car outside, (b) warm-up my car during the time I clean the snow, (c) no EBH, (d) no grill blocking, and (e) my drive to work is only ~15 miles round trip, but still mileage in the high 20s/low 30s is lousy, even lower than my break-in mileage (30s) that occurred in Jan. Even, my 1995 Corolla with 150k miles also gives about mid-20s during the winter with identical driving styles and conditions. So what's with the Prius?

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