Forums/Z31P/z31-repairs-forums engine-mechanical/ignition module transistor
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300zxanderson: (2016-11-29 03:33:11)
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.
zachary.ard: (2016-11-29 04:02:01)
Well - code 21 could be a couple of things.
If you think its the PTU (Power Transistor Unit) here is a how-to to use a newer, upgraded PRW-2 unit.
https://z31performance.com/forum/z31…ransistor-unit
If you think the issue is a faulty Crank Angle Sensor, they are available here -