D4 light is constantly flashing. Replaced R 41 that cleared a prior shift issue. Replaced R 42 next for 41 but no change.
Thanks

Don

 

Is there a question?

Suggest posting codes by observing D4 light flashes w/ service check connector shorted. See DIY forum for guidance on Check Engine Light diagnostics (same procedure but d4 will flash codes).

good luck

 

Check engine light is not on. D4 is flashing. Only issue.
Thanks

Don

 

The D4 light flashing means the transmission computer detected a problem. You should check for transmission codes as TexasHonda suggested. The common diy thread on top of the gen tech help forum has a link to checking engine codes.

 

Thank you. Will commence chasing issue
Don