View Full Version : code 21 vtec selonoid

03-28-2002, 11:49 PM
I have a 88 honda crx with a b16a and i just recently put a pwo ecu and now its got code 21 and the check engine on the whole time help me out here why is it there?

Hybrid Hatch
03-29-2002, 12:00 AM
http://www.hondata.com has info on ecu trouble shooting

03-29-2002, 01:29 AM
umm...... maybe your vtec isn't hooked up. Who did your wiring? How was the Vtec activated before the addition of the PW0 ecu?