I don't think there was any ECU protection for that model civic.
Quote:
all HX had the ability to "lean burn" only difference is that the California model had a different ecu.
this is the california ecu's part number 37820-P2N-L31 and the 49 state ecu 37820-P2N-A31.
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So something is different.
Also found one on ebay for 90 bucks.
://cgi.ebay.com/ebaymotors/2000-Honda-Civic-HX-ECU-Engine-Computer-Unit-Module-A32-/140511820324#ht_500wt_749]2000 Honda Civic HX ECU Engine Computer Unit Module A32 - eBay (item 140511820324 end time Mar-14-11 17:39:56 PDT)
Here is the list of all the Civic Ecu Codes as well.
Code: OBD: VTEC: Found In:
P05 1 no 1992-1995 Honda Civic CX
P06 1 no 1992-1995 Honda Civic DX
P07 1 yes 1992-1995 Honda Civic VX
P08 1 yes 1992-1995 Honda Civic D15B (JDM)
P27 1 yes 1992-1995 Honda Civic EG JDM1600 SOHC
P28 1 yes 1992-1995 Honda Civic EX/Si / del Sol Si
P2E 2 no 1996-1998 Honda Civic DX
P2M 2 yes 1996-2000 Honda Civic (NZ) SOHC VTEC
P2N 2 no 1996-2000 Honda Civic HX
P2P 2 yes 1996-2000 Honda Civic EX (D16Y8)
P2T 2b yes 1999-2000 Honda Civic Si
P30 1 yes 1992-1995 Honda del Sol DOHC VTEC EG/SiR