Inverter pump failure aftermath?

arniesalsared · 10-23-2009, 01:03 PM

Hi all
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??

Any thoughts appreciated.

Arnie

David Beale · 10-23-2009, 04:00 PM

If the inverter parts start failing you will get big time indication (red triangle etc.). I don't think it would affect mileage without some warning lamps/buzzers.

Is it cooler out now? That will drop your mileage.

Have the oil companies switched to oxygenated fuel recently? As I recall in your area this happens around this time of year.

10-23-2009, 01:03 PM	#1
arniesalsared Member Join Date: Aug 2004 Location: Phoenix, AZ Posts: 40 My Car: 2008 Prius Model: II Package: N/A Thanks: 0 Thanked 1 Time in 1 Post Friends: 0	Inverter pump failure aftermath? Hi all 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?? Any thoughts appreciated. Arnie __________________ '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.

10-23-2009, 04:00 PM	#2
David Beale Senior Member Join Date: Jul 2006 Location: Edmonton Alberta Posts: 3,441 My Car: 2007 Prius Model: Package: B Thanks: 5 Thanked 373 Times in 296 Posts Friends: 0	Re: Inverter pump failure aftermath? If the inverter parts start failing you will get big time indication (red triangle etc.). I don't think it would affect mileage without some warning lamps/buzzers. Is it cooler out now? That will drop your mileage. Have the oil companies switched to oxygenated fuel recently? As I recall in your area this happens around this time of year.

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