Wont shift into 5th gear, all the dash lights flashing

My 08 tundra dashlights flashing and wont shift into 5th gear.

 

Flashing dashlights are a Major signal from the ECU, usually telling to let off the throttle but a CEL code should have been set or pending. Have you read it?

 

You can try pulling off the negative battery cable for a few minutes and reconnect to see if you can reset system.

 

Could be a solenoid or a number of things. Best to hook up a scanner and pull the code(s) if you can.

 

Prob a solenoid.

Any recent trans service?

 

Had it scanned yesterday. No codes. Was told to have it scanned by a transmission shop. Pulled the negative, didnt help

 

Scanned with Techstream? Might be a code in another ECU than the main.

 

I have the same issue, repaired by replacing gas ⛽ cap, you need to hear the vacuum break when removing gas cap, and cleaned throttle body ,any issues hit me back.

 

Could it be going into "limp mode"? My tundra is having an issue with p0101 and when that code pops my traction and abs lights come on with others. Also I've seen it happen when something like the tail lights go out and a code isn't set. If you have a scan tool that can scan the ABS modul for codes and see if C1201 comes up or something similar.

 

Hi, I'm having the same issue (limp mode) won't shift into 5th or 6th.
CEL-ABS & TRACTION CONTROL lights on dash. I scan it and it gives me a P code stating the input shaft sensor is bad. I replaced it with a brand new. But did not help.
My next step is taking it to transmission shop.
Was hoping you found a remedy.