| | ||||||
| This is a discussion on Inverter pump failure- aftermath? within the Gen II Prius Care, Maintenance and Troubleshooting forums, part of the Gen II (2004-2009) Toyota Prius Forums category; Hi all Posted this in the Gen Tech section possibly wrong place so, again- We have three GenII Pri's in ... |
Inverter pump failure- aftermath?
![]() |
| | LinkBack | Thread Tools |
| | #1 |
| Member Join Date: Aug 2004 Location: Phoenix, AZ
Posts: 39
My Car: 2004 Prius Model: Package: #8 Thanks: 0
Thanked 1 Time in 1 Post
Friends: 0 | Hi all Posted this in the Gen Tech section possibly wrong place so, again- We have three GenII Pri's in the family. The three located in Arizona have had Inverter pump failures each during a peak heat month. All have been replaced on warranty, mileage from 35k to 85k with assurance that no long term damage has occurred. My '04 has 85k and it's failure occurred a few months ago. A few weeks ago noticed that one tank average had dropped from 50 +/- 1 to 43 +/- 1 MPG. Checked tire pressure, oil level, brake drag, DTC's etc and all good. Could the inverter semi-conductors be going bad with no DTC's? What else could it be??
__________________ '04 Salsa Red EV CAN-view, Pioneer Nav, Backup Cam Approx 70,000 miles and close to 50 MPG avg. Wife has '06 w/35,000 miles and only gets 44 MPG! Two daughters have 07's getting 50 MPG. |
| | |
| The Following User Says Thank You to arniesalsared For This Useful Post: | dave77 (10-24-2009) |
| | #2 |
| DIY Enthusiast Join Date: Mar 2008 Location: Green Valley, AZ
Posts: 4,053
My Car: 2004 Prius Model: N/A Package: #9 Thanks: 21
Thanked 213 Times in 184 Posts
Friends: 44 | Usually a semiconductor acts in a binary function: it either works or it doesn't. So if your car becomes READY and there are no warning lights, I would look elsewhere for the reason for an mpg decline. Also, having mpg low with one tank is not enough to be worried. Who knows, you might have been shortchanged at the pump, the energy content of the fuel might be below normal, etc. |
| | |
| The Following User Says Thank You to Patrick Wong For This Useful Post: | dave77 (10-24-2009) |
| | #3 |
| Destination: Eschaton Join Date: Mar 2004 Location: United States
Posts: 5,512
My Car: 2004 Prius Model: N/A Package: #6 Thanks: 99
Thanked 93 Times in 66 Posts
Friends: 0 | [mis-information deleted] Last edited by richard schumacher; 10-24-2009 at 12:25 PM. |
| | |
| The Following User Says Thank You to richard schumacher For This Useful Post: | dave77 (10-24-2009) |
| | #4 |
| Senior Member Join Date: Apr 2004 Location: Kunming Yunnan China
Posts: 2,411
My Car: 2001 Prius Model: Package: Pioneer #1 Thanks: 1
Thanked 39 Times in 39 Posts
Friends: 14 | Does Phoenix switch to a winter fuel blend right about now? |
| | |
| The Following User Says Thank You to tochatihu For This Useful Post: | dave77 (10-24-2009) |
| | #5 |
| Senior Member Join Date: Apr 2007
Posts: 147
My Car: 2007 Prius Model: Package: #6 Touring Thanks: 3
Thanked 12 Times in 10 Posts
Friends: 1 | What was that news I recently heard? Something about the gas expanding in underground tanks when temps outside become high, thereby making pumps indicate more fuel was pumped than what actually flowed into tank. |
| | |
| The Following User Says Thank You to ibmindless For This Useful Post: | dave77 (10-24-2009) |
| | #6 |
| Senior Member Join Date: Mar 2005 Location: Bahstahn
Posts: 3,625
My Car: Model: Package: Thanks: 0
Thanked 216 Times in 118 Posts
Friends: 0 | Even if the little processors on the inverter electronics module are flash-based, I seriously doubt a dealer has any way to reload them. Main ECUs, yes, something as embedded as that, no. I spotted nothing that looks like a programming interface on the control board. . _H* |
| | |
| The Following User Says Thank You to hobbit For This Useful Post: | dave77 (10-24-2009) |
| | #7 |
| Gen III Forums Moderator Join Date: Dec 2003 Location: Surprise, AZ (Phoenix)
Posts: 4,074
My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 216
Thanked 437 Times in 196 Posts
Friends: 18 | Not to support anecdotal theories, but I kinda noticed the same thing after mine went at 101k miles. MPG was never quite the same after. I kinda thought it was the overpriced injector cleaner they put through as well. |
| | |
| | #8 |
| Senior Member Join Date: Mar 2009 Location: USA
Posts: 438
My Car: 2009 Prius Model: Package: #2 Thanks: 246
Thanked 20 Times in 19 Posts
Friends: 19 | I think it is possible for transistors to degrade after operating at too high temperatures. The dopants could diffuse away from where they are supposed to be. |
| | |
| | #9 |
| Member Join Date: Aug 2004 Location: Phoenix, AZ
Posts: 39
My Car: 2004 Prius Model: Package: #8 Thanks: 0
Thanked 1 Time in 1 Post
Friends: 0 | The '04 has now had at least 4 tanks of fuel and still 45 or so average on MFD and by tank calculation. Slightly better due to the cooler weather. 10 % MPG reduction is not worth a huge effort but it's got to be related to the pump change. Now it's comparable to my wife's '06 fuel efficiency. |
| | |
![]() |
| Tags |
| aftermath, failure, inverter, pump |
Similar Threads | ||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Inverter pump failure aftermath? | arniesalsared | Gen II Prius Technical Discussion | 1 | 10-23-2009 04:00 PM |
| Gen II inverter failure | toyautoman | Gen II Prius Technical Discussion | 7 | 08-05-2009 11:49 AM |
| How critical is the inverter pump? | hobbit | Gen II Prius Technical Discussion | 18 | 07-22-2009 02:00 PM |
| inverter pump failure - dodged the bullet | k5rcr | Gen II Prius Main Forum | 3 | 07-19-2009 11:14 AM |
| Drives Perfectly but inverter failure? | Nick900 | Gen II Prius Care, Maintenance and Troubleshooting | 61 | 07-12-2008 09:39 AM |
| Bookmarks |
« Previous Thread
|
Next Thread »
| Thread Tools | |
| |












