2005 Prius...113k miles...master warning light & a coolant temperature briefly light up several times while commuting. The inverter coolant tank stays full, but the motor coolant is empty every day after a 30 mile commute. I fill it up & 30 miles later it is empty. There are no puddles or evidence of a leak while parked in the garage.
View 3 RepliesThe master waning light came on while I was commuting on the freeway. There was no MIL. I've seen this a month or so ago and, as before, since nothing seemed wrong, I kept going. The last time this happened the warning went away after a day or so. This time it is sticking around. As before, there seems to be no problem with the car -- 80 mile commute, no loss of power, same gas mileage as before. I have a generic ELM327 OBD reader. I tried reading codes but there were none (at least none that it could read since there was no MIL).
Any second source for the Prius Mini-Scanner (or have one they want to sell)? Or, can a regular OBD scanner be trained to read the special prius codes?
Just bought a 2002 Prius for my daughter at an auction and the car has been driving fine the last few days even though the hybrid warning light has been on and off. Found no fault code with OBDII. Found out later from Toyota service history the cause of the hybrid warning light was a leaked hybrid battery. The previous owner disposed the car off at the auction before the problem was fixed.
I was driving today and the coolant high temperature came on and I can't rev/drive. Stopped engine and re-start after a while and coolant high temperature warning light gone. Drove a short distance and coolant high temperature warning light came back on. Used a OBDII and found no fault code. Radiator hose by the radiator cap is cold but hose at the top right side of radiator by the hybrid system is hot. Opened radiator cap and it is full of coolant.
The car has been serviced on 12/26/2012 before it went to the auction. Can air pocket trapped in the radiator cause this coolant high temperature warning light and can't rev/drive problem. Also today is the first time we didn't use the heater. We used the heater to defog the windscreen and heater work.
I was driving my 2007 Prius on the freeway this morning after picking it up from my mechanic and the high coolant temperature warning light came on for ~4-5 seconds but then disappeared. I was able to safely drive it another 5 miles to work and park. My mechanic changed the engine and transaxle fluids in my car (along with pcv valve and serpentine belt replacement, engine oil and filter change) just before, so we think this could have been due to an air pocket in the coolant system. I will need to check the coolant level once the engine has cooled down and refill if necessary. I plan on driving it around locally before going on the freeway in case the warning comes on again.
View 11 RepliesI have a 2005 with 168,000 miles on it. I just changed (well... about 3 weeks ago) the hybrid battery in it. Of course, the reason I did this was that I was getting the christmas tree lights and the codes - all pointed to the battery and since I knew it was about time, I succumbed! Just prior to that, I ran it for 2-3 weeks with it constantly going into limp mode, so I would have to pull over, shut it all down, power it back up and I was ok for several more miles. This went on until it got so bad that I had to replace the battery. Right around the same time, I accidentally backed up and hooked the right rear bumper on the curb - backed over the curb - so that it kind of ripped the right-rear side of the bumper off - broke the plastic clip/strip behind the bumper that held it on. Because of that, while my whole interior was ripped out, and my 'new' hybrid battery was installed, whenever it rained, water would enter into the 12V battery compartment in the right rear of the car, such that it would slosh around and you could hear it while driving. But during this same time, as I said above, after I put the replacement hybrid battery in there, the car ran great, except for 3-5 times a day when I am rounding an unusually sharp curve, when the red triangle warning light comes on for maybe 1-3 seconds and then goes off.
View 4 RepliesI've had this happen twice: I'm stopped at a light (on relatively level ground--only slight incline). My gas engine kicks off. OK, fine. As it should. But then it comes on again, maybe a second or two or maybe three or four later, while I'm still stopped. First time, it did this a few times back and forth, all while stopped, waiting for the light.
View 7 RepliesI'm still trying to get a manual for my recently acquired 2004 Prius, so I can't trace down what this means....
When I start the car, recently, a "Maint Required" light comes on and flashes about three or four times, then goes away. This is after all the other dash lights during the test phase go out. When I took it to have the codes read, the device said "No Codes" stored.
What does this mean? And is it a serious problem?
It was a cold winter in Boston in the last two months. And since then almost every time I started my 2005 Prius, the temperature was default to 75F. Also, the first time I start the car in a day, it almost show the outside temperature as Celsius instead of Fahrenheit unless I press the screen to display something else and then come back, then the Fahrenheit will come back.
View 9 RepliesOur 2005 Prius with 160,000 miles is displaying warning lights and the gasoline engine is reving at times and not shutting off when the car is at a stop light.
The dealer says it is throwing a P3000 and P0A80 codes. I asked for subcodes, the dealer doesn't know what I am talking about.
The dealer wants to replace the hybrid computer for $900 and if that doesn't fix it they want to replace the hybrid battery for $3500.
Purchased used 2006 and the left tail light does not work at times until I rotate the socket as if removing it. This happens frequently and then after about 3 weeks the bulb blows. I've confirmed the there is no socket terminal issue and no intermittent opens in the wiring to the socket. The buld internal glass blackens as if it is running too hot but the voltage measures slightly over 12V when I've measured it. The bulbs are rated at 13V. At this point the only thing I can think of is there must be an occasional high voltage spike that hits the left tail light but not the right tail light.
View 5 RepliesSo coming home from work the engine started misfiring and the Service engine light started blinking five times in staying on for five seconds and then blinking another five times in series. The car started writing very rough and stalled out every time I came to a stop which was not normal function for vehicle. Made it to the Toyota dealership. After paing the Service fee they told me it was possibly spark plugs, ignition coil pack, and an O2 sensor not functioning. I just changed the spark plugs and ignition packs three months ago. So I took the car home put new spark plugs in and a new ignition pack I ordered from Amazon and put it in cylinder for (which they told me at the Toyota dealership) and installed a new O2 sensor myself. Disconnected the battery to clear any trouble codes and restarted the engine. The problem still exists. The trouble code they gave me at the dealership was.p0304, p0138, p0110. The car is still miss firing and Service light keeps blinking.
View 1 Repliesfor the last three days, I had the big red master warning light come up four times during normal braking, also "Problem" was displayed on the LCD where "Add fuel" is displayed when fuel is low. But no error code showed on the OBD reader. I searched found that it might be related to 12V battery which I replaced two years ago.
2008 with 120K miles.
My "Maintenance Required" light on the dash is flashing 4-5-6 times when I start up the Prius every time, why?...
I went through all of my Maintenance menu items and most of them arent set to begin with, but the ones that ARE set, still have 4000+ miles til the next service...
Last night I went to drive my car and my coolant light went on. I checked the overflow and it was very low. There was barely any left in the overflow. I thought this was strange because I had just checked the coolant a couple days ago. The coolant that was in my car was an orange color (after searching I realized that I think this is g12 which I was unfamiliar with). Before searching I added Prestone 50/50 pre diluted green coolant. The bottle said it was mixable with any type of coolant color or kind. After reading more threads I'm seeing that I think the g12 just contracted with the cold weather and I should of just left everything. I have barely driven the car since adding the prestone. Am I doing harm mixing in the prestone? If so, How can I fix this?
On another note, With the cold weather my temp gauge seems to be acting a little funny. Once the car is up to operating temperature the gauge will then drop around 40-50 degrees. It will then stay like this while im driving, but then will go back to normal once the car is stopped and running.
I most recently drove my 2006 Prius around on Saturday Feb. 1, with no problems at all. I went out of town for a couple of days, and returned this afternoon to a car that will not start. I stepped on the brake, pushed Power, and things lit up, the "Ready" light flashed a few times but then went off. Power button light stayed orange.
Several warning lights on dash stayed on (!)/ABS/VSC/traction control, and a message came on the screen saying something about a problem with "P" parking, and that it should be parked level and the parking brake applied. It is sitting level with the parking brake applied already. Also, the door ajar warning light and beep start as soon as you open the car door to get in.
I'm thinking from what I've read that my 12v battery has died/is dying. I'm the original owner, bought car in March 2006, and it has just under 61,000 miles on it.
As a Prius driver, I have driven my 2012 Prius more than 110,000 miles. I love the car and have a suggestion on improvement - Create new software to allow the driver to monitor engine coolant temperature and RPM from either the dash display or touch screen display.
I like knowing if my car engine is up to temperature before punching it on the freeway ramp or about to overheat before an idiot light goes on.
I have replaced radiator and thermostat, awhile back.. I checked and there is antifreeze in the radiator and the reservoir. I don't drive it unless i really have to. and not to far,lots more work to do on it. But the coolant light started blinking the other day. Temperature gauge inside is ok. What could this be? what should I do? Still haven't got the blower working, heater / ac / defrost.
View 5 RepliesIt has been documented that the computer will let the ICE coolant cool to a lower temperature before mandating it to fire up again to maintain that lower limit.
Why isn't this done in other modes? Is this compromising anything when it comes to emission or engine protection? Since full power is available in ECO mode, one can force the ICE to drive with full output, even when it is a little cold.
For the past two days, the coolant temperature gauge has registered cold (far left) all of the time. Just the day before, it registered about center when the engine warmed up, it's typical location.
The vehicle seems to run just fine, and the coolant level looks good. Is it safe to drive it to a shop (~35 miles) to be fixed?
My wifes 2008 prius check engine light just came on. Its the control valve sensor. My question is, does that have any serious impact on safety? I've heard mixed on what this valve does (overheating etc).
View 6 RepliesI have a 2009 Prius and the check engine light came on last week. I decided to take it to a highly recommended auto repair shop instead of the dealer. The error cord was P1121 and they replaced some kind of coolant control valve. When I went to take the car home I noticed the check engine light was still on and they said there was another similar but different coolant valve that needed to be replaced. They replaced the other part and everything seemed fine.
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