https://dev.z31library.com/index.php?action=history&feed=atom&title=Forums%2FZ31P%2Fz31-repairs-forums_engine-mechanical%2Fignition_module_transistor 2026-08-15T19:11:46Z Revision history for this page on the wiki MediaWiki 1.43.8 https://dev.z31library.com/index.php?title=Forums/Z31P/z31-repairs-forums_engine-mechanical/ignition_module_transistor&diff=6112&oldid=prev 2026-05-15T05:17:20Z

<p>Forum archive import (z31performance)</p> <p><b>New page</b></p><div>{{ForumImport<br /> |op_user=300zxanderson<br /> |op_date=2016-11-29 03:33:11<br /> |post_count=2<br /> |archive_url=/Z31performance_archive/forum/z31-repairs-forums/engine-mechanical/533501-ignition-module-transistor.html<br /> }}<br /> <br /> &#039;&#039;&#039;300zxanderson:&#039;&#039;&#039; &lt;small&gt;(2016-11-29 03:33:11)&lt;/small&gt;<br /> <br /> Error code 21 is popping up. I think i need to replace this component. Does anyone have a spare one of these. The only one I can find is over $100. If you think the error code 21 is something else please let me know.<br /> <br /> ----<br /> &#039;&#039;&#039;zachary.ard:&#039;&#039;&#039; &lt;small&gt;(2016-11-29 04:02:01)&lt;/small&gt;<br /> <br /> Well - code 21 could be a couple of things.<br /> <br /> If you think its the PTU (Power Transistor Unit) here is a how-to to use a newer, upgraded PRW-2 unit.<br /> <br /> https://z31performance.com/forum/z31…ransistor-unit<br /> <br /> If you think the issue is a faulty Crank Angle Sensor, they are available here -<br /> <br /> [http://store.acadianasportscars.com/en056-0002 http://store.acadianasportscars.com/en056-0002]</div>

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