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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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Generally "reflash" refers to a complete replacement of the PCM memory or a module ROM for some reason - electromagnetic interference or electrical spikes have contaminated some or all of the memory.

"Relearn" refers to a specific procedure to reset monitoring or parameters for a sensor or control - as in a CranKshaft Position sensor relearn (determines electronic timing offset between original and replacement CKP sensor(s)).
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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69,480 Posts
Depends on what you're looking for........BUT, relearns and reflashes are tied to the original car year and VIN. ("Hey, Joe, can you reflash my PCM to a Z rated STS program ???" Joe at the dealer: "No". "Hey Joe, when you install my new CKP's, will you do a relearn ???" Joe at the dealer: "Yes".)
 

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2000 STS/2002 H.D. nightrain
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53 Posts
Discussion Starter #5
the pcm is not the oem .the crank sensors have been replaced three times and now i guess i need a re-learn.does the dealer need the car or just the pcm.legally i cant drive the car because it failed state inspection for the check engine light.i'm between a rock and a hard place
 

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97 ETC x2, 04 GXP, 04 STS x2, 97 ESC, 99 Deville, 05 SRX
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2,603 Posts
They will need the car for sure. You'll either be getting a tow or taking your chances with the local law enforcement.
 
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