Alright guys, I really need help. I want to tune this weekend but I can’t get rid of code 21.
Long story short, I just finished my ls-vtec and at first I got code 22 which I canceled out using this diagram

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Now there is no more code 22 but I’m getting code 21 upon start up, even after resetting the ecu.

I am sure that the vtec solenoid is clean of derbies and that it is working. However, there are no wires hooked up to the vtec pressure switch. When using the diagram above does one need to hook up any wires to the vtec pressure switch? I think that’s where the problem might lie. Does anyone know if you’re suppose to hook up a ground to the vtec pressure switch when using the diagram above? Im going to try that tomorrow before I wire up the vtec pressure switch directly to the ecu.

My next question is, when wiring the vtec pressure switch directly to the ecu, where does the two vtec pressure switch wires to? I know that one goes to D6 but what about the other one?

If you know anything about this matter please speak up!
Thank you.

 

VTP is normally wired to the ecu & to a ground.

What ecu are you using?

 

po6 w/ vtec conversion.
The ecu is fine because i tired it on my friend's car and vtec hit. it also didnt throw any cels.

it's running off a base map right now.

It will be tuned with an s200 this weekend, i hope.

 

nvm, it was a wiring problem.