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Ask Amedee Your Own Question
Amedee, Former ASE Master Technician
Category: Honda
Satisfied Customers: 26064
Experience:  ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
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Honda Odyssey EX: 2009 Odyssey, Flashing "D" check engine light

Customer Question

2009 Odyssey, Flashing "D" check engine light on, VSA light on, no automatic transmission shift...what's happening?
Submitted: 5 years ago.
Category: Honda
Expert:  Amedee replied 5 years ago.

The computer has detected a malfunction with the transmission control systems. If it was emission related, it would have turned the check engine light on. You will need to get your computer scanned for codes and have this checked out by either a Honda dealership or a transmission shop unless you want to try and pull codes yourself.
The VSA light is on because of the same reason.
Customer: replied 5 years ago.
I brought it to a repair shop and they say it is a bad altenator, but I do not believe and altenator would cause shifting problems
Expert:  Amedee replied 5 years ago.
This does happen from time to time. IF the alternator was over or under charging, then it could be possible. Just get a voltmeter and put it on the battery with the engine at idle. IT should read close to 14.0 volts.
Customer: replied 5 years ago.
Thanks for the reply. It was hard for me to believe it was the alternator so I took it to a Honda dealer. They discovered the main wiring harness in the engine compartment was chewed away by rodents. I had it replaced - ok now
Expert:  Amedee replied 5 years ago.
YUP! That will do it!

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