Toyota Prius Software Problems - READ ONLY

752 messages, Last post on Sep 10, 2006 at 5:54 PM

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#683 of 752 Fun With Math by mithrandir Mar 16, 2006 (7:51 pm)
One thing to keep in mind about mileage: it's a rate. Going from 50 mpg to 45 mpg represents the same increase in absolute fuel consumption as going from 25 mpg to 23.7 mpg. Even more telling, going from 60 mpg to 50 mpg is the same as going from 20 mpg to 18.75 mpg! But few people would readily complain about the latter because it doesn't look bad. Proof: If you drive 12,000 miles 60 mpg: 200 gallons 50 mpg: 240 gallons Increase: 40 gallons 20 mpg: 600 gallons 18.75 mpg: 640 gallons Increase: 40 gallons Doesn't matter how many miles you choose. The increase is the same. This also proves that you can't compare mileage specs using percentages, it's all about how much fuel you actually use.
#684 of 752 Re: MPG Problem? [jfc1] by dorisnichols Mar 18, 2006 (3:53 pm)
Replying to: jfc1 (Oct 19, 2005 7:18 pm) I own a 2004 Prius which was getting good mileage in 50's now it is started getting 36 to 40. This is after the recall. I think it is programed to make the engine run more on gas. The dealer said to change the air filter and clean the engine which we did but so far no change. Replies to this message: gagrice (Mar 18, 2006 5:46 pm) mrosa (Apr 19, 2006 11:59 am) abennett (May 06, 2006 5:39 pm) stevedebi (May 06, 2006 6:10 pm) devsienna (May 08, 2006 12:02 pm)
#685 of 752 Re: MPG Problem? [dorisnichols] by gagrice Mar 18, 2006 (5:46 pm)
Replying to: dorisnichols (Mar 18, 2006 3:53 pm) now it is started getting 36 to 40 Welcome to the forum. I would keep bugging the dealer. If you know you have not changed your driving style, there may be something wrong. You are not the only one that has claimed mileage went down after Toyota did the update to prevent stalling. If they keep telling you nothing is wrong. You might ask the service manager if he knows of another dealership that has more experience with the Prius. I would not let them off the hook. Your mileage has dropped close to 25% from what is normal mileage.
#686 of 752 LCD screen and Navigation problem by bri4 Apr 10, 2006 (5:05 pm)
I purchased a 2005 Prius with the navigation package version 04.2 on 6-22-05. On February 23, 2006; I witnessed the screen lose half the brightness, and road lines, instead of being smooth, are now segmented(jagged).The colors in other displays have also changed color and darkened. I would like to hear from anyone that has experienced this and what remedy Toyota offered. Replies to this message: jrct9454 (Apr 11, 2006 4:58 am) bri4 (Apr 12, 2006 4:38 pm) stevedebi (Apr 11, 2006 8:28 am)
#687 of 752 Re: LCD screen and Navigation problem [bri4] by jrct9454 Apr 11, 2006 (4:58 am)
Replying to: bri4 (Apr 10, 2006 5:05 pm) Isn't this covered under warranty? Have you asked a dealer for a diagnosis? Replies to this message: bri4 (Apr 12, 2006 4:38 pm)
#688 of 752 Re: LCD screen and Navigation problem [bri4] by stevedebi Apr 11, 2006 (8:28 am)
Replying to: bri4 (Apr 10, 2006 5:05 pm) Is your Prius under warranty? Don't bother asking - just take it in. It appears to be a simple failure of the LCD.
#689 of 752 Re: prius center console problems: check out TSB EL002-05 [looking4prius] by 2hybridfamily Apr 11, 2006 (9:24 am)
Replying to: looking4prius (Mar 07, 2006 2:38 pm) You can get a cover that matches the interior of the Prius on Ebay - designed for it, as a matter of fact. We have a Prius and just bought a Hightlander Hybrid we were so happy with the Prius. Glad we got the Highlander this year - I don't like the look of the 2007! I've got a question - Does anyone know if the 2007 Prius will have a moonroof option. I'm a bit afraid to go aftermarket on this vehicle. Not enough people know how to work on them that have been trained ... don't want to mess up anything on it. Let me know if you know. Thanks & Peace, Patty
#690 of 752 Prius Software problems by midnightcowboy Apr 12, 2006 (5:34 am)
A lot of problems have bee traced to HMI and reprogramming or retirement of the older HMIs has fixed the problems.
#691 of 752 Re: LCD screen and Navigation problem [jrct9454] by bri4 Apr 12, 2006 (4:38 pm)
Replying to: jrct9454 (Apr 11, 2006 4:58 am) I took the car to the dealership and they observed the condition. The service manager called the Toyota Service Rep. and responded back to me that they are aware of the problem. The dealer service department could not help me. An appointment was made with the Toyota Manufacturing Service Rep. We drove my car and another used 2005 Prius. The Rep. concluded that both systems have the same characteristics and I agree. My contention is that they tested it against a used car with the same problem instead of a new system of the same version. I was told that they don't have any. I told them that their test method is wrong. I have since had numerous conversations with Toyota headquarters Torrance. They say they can't help me and have forwarded papers for arbitration. I cannot understand the reluctance to fix the system that has degraded within seven months.
#692 of 752 Re: MPG Problem? [dorisnichols] by mrosa Apr 19, 2006 (11:59 am)
Replying to: dorisnichols (Mar 18, 2006 3:53 pm) I've had the same problems with my '04. It has been serviced numerous times by the dealer whose techs look lost when the issue is explained to them. They usually hook it up to some service-mandated computer propram that "updates" the computer software. But it is clear that few if any of these guys have any real experience working on this type of car. Its like my attempting to explain how a VCR works on the basis of my ability to program it by pushing a few buttons. I would suggest taking yours to a Toyota dealer and requesting a "computer software update" that they say can improve the mileage. I just did mine but I was not impressed by the results thus far. Hope this helps...