PCM replacement questions

[Jester420]

Ok so I had a code for my NE2 crankshaft position sensor so I check the sensor the wiring harness was worn through and I replaced it. The code was still being thrown and I checked everything before I eventually took it to the dealer for a diagnostic. It cost's me $200 for them to tell me that I had a faulty circuit in my pcm and it would cost me $1800 to replace it. Now my car runs just fine and the idle is even steady and smooth even though a faulty NE2 sensor is supposed to cause erratic idle. The only reason I need to fix the problem is to pass the california smog test b/c my check engine light needs to be functioning properly to pass the test. So does anybody have any ideas about how to fix this problem for an affordable price. I've thought about going to a junkyard and getting a PCM out of a wrecked car but honeslty I'm a little nervous about putting a junkyard PCM in my car. Any ideas on that and also how complicated is it to actually do the process of swapping the PCM I don't even know where it's actually located and I've searched this site for ever and found nothing on it. Any help, suggestions or comments would be greatly appreciated I"m in a really tight spot right now. Thankyou for anything you can do.

[TexasBlack6]

This may be a simple fix.

Have you cleared the code?

Some codes reside in the PCM memory until you clear them out. To clear the code, unhook the battery (make sure you know the code for your alarm if installed) and while the battery is disconnected press the brake pedal for about 10 secs. Leave the battery disconnected for a couple of minutes to be sure it gets cleared. Then reconnect the battery. Your car may idle a bit funny for a minute after reconnection while the PCM recalibrates all settings.

If you've done that and it's still a no go, then the PCM is located in the center console under the stereo and control panel. Make sure you are grounded when you handle it.

Only other advice I can give you is to get out of CA.

By the way, I've never heard of a $200 diagnostic fee, even from a dealer. Robbery.

[Jester420]

yes of course I cleared the codes. and I know that $200 is way too much to figure that out but thats how the dealer is their horribly shady and I hate it. thanks for your reply.