trouble codes 83.84 and 85 (1 Viewer)

[Cpt. Kirk]

Does anyone know if there is any concern over these ECM codes, the vehicle is running fine, should I just erase them.
thanks
1993-80- with 70 000 miles :

 

[cruiserdan]

Does anyone know if there is any concern over these ECM codes, the vehicle is running fine, should I just erase them.
thanks
1993-80- with 70 000 miles :

You need a new engine ECU to make it go away. The part number is 89661-60221. The current list price is $1,550.04


d-

 

[NorCalDoug]

I would hope that C-Dan is kidding...but the lack of smiley's would be a huge hint that he isn't.

:bummer:

 

[cruiserdan]

Nope, not kidding.

The only way to make it go away is to replace the ECM. I had to get one for mine. It happens on early 93's only.

 

[Cpt. Kirk]

ouch! I wonder if I can grab one from a junk yard?

 

[cruiserdan]

Be sure it's the number I posted above. That would be late 93 and 94 only. Do not get an 89661-60170 or 60220, you will be no better off.


D-

 

[anderaa13]

I got those three codes 4 or 5 years ago. I erased them and they never came back. However, I think other people have erased them and they just came back. Might as well try before you find a new computer.
aaron

 

[cruiserdan]

That may work for a time. Mine would come back almost immediately. It certainly wouldn't hurt to try re-setting it.

 

[alaskacruiser]

Just curious- what do these codes mean and what are the possible risks if you leave in the old ECU with these codes showing?

 

[cruiserdan]

They relate to TCM-ECM communications. I think it relates to the TCM telling the ECM that the transmission is about to shift gears. There is a momentary reduction in engine output when the transmission shifts gears. The TCM and ECM are combined in one assembly in 95-up. And no, you can not run a later ECM in the early vehicle.


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[robbie]

count down timer when it reaches 100 it blows up. robbie