ECU Families:

• "Pre-OBD" - Early fuel injection designs
• DualPoint - 88-91 (88-95 in Europe) OBD0-ish DPFI Civics
• "OBD0MPFI" (88-91 MPFI *Non*-Vtec Civics, Integras)
• "OBD0MPFI" (88-91 MPFI *Non*-Vtec Prelude/Accord B20A)
• 92-95 "OBD1" Civics and Integras
• OBD1 92-95 (ish) Prelude/Accord

"Pre-OBD" - Early fuel injection designs

• PG7 : 86-87 USDM/JDM Integra (D16A1 Vacuum Advance)
• PE7 : 85-87 EDM/USDM Civic/CRX Si (EW3/EW4 Vacuum Advance)
• PJ1 : 85-87 EDM Integra 1.6i-16, CRX MK1 1.6i-16

• PJ7 : 86-87 Prelude 2.0 Si (B20A3) (Vacuum Advance ?)
• PJ0 : 86-89 Accord A20 (Vacuum Advance)

• PL2 : 8?-88+ Honda/Acura/Rover V6 (C25/C27)

Dual Point - 88-91 (88-95 in Europe) OBD0-ish DPFI Civics

• PM5 : 88-91 Civic Std / CRX DX (??)
• PM9 : 88-91 Civic Std / CRX DX (??)
• P04 : 92-95 Euro EG DXi
• PW1 : ??-95 Euro Concerto 1.5i

"OBD0 MPFI" (88-91 MPFI *Non*-Vtec Civics, Integras)

The following ECUs all share a common circuit board design(with some minor differences):

• PG7 : 88-89 Integra (D16A1 - Electronic Advance)
• PM6 : 88-91 Civic/CRX SOHC Si (1.6l SOHC)
• PM7 : 89-91 Civic Si DOHC ZC (JDM EF3) (Euro A20A Also reported by Mark Lamond)
• PP5 : 88-94 inc PP4. Honda Concerto, UK Rover 216, 220, 416, 420, GSi, Gti, ???
• PR5 : 90-91 JDM Integra ZXi (1.6 sohc)
• PS9 : 90-91 USDM Civic EX (1.6L SOHC - usually auto)
• XE5 : 88-91 (dates questionable?) Mugen Race platform (ZC)

"OBD0 MPFI" (88-91 MPFI *Non*-Vtec Prelude/Accord B20A)

• PK2 : 88-91 Prelude Generation 3 B20A Engine
• PH3 : 86-89 Accord JDM B20A Engine

The PM8 and PR4 each have unique circuit boards, although their code is mostly compatible with the other ECUs in this family.

• PM8 : 88-91 CRX HF (Euro ZC also reported)
• PR4 : 90-91 USDM Integra LS/GS B18A1 (note: OBD1 PR4 exists too)

92-95 "OBD1" Civics and Integras

• P07 : 92-95 OBD1 Civic VX (D15Z1) scan (Thanks Katman!) 6 Wire O2 P07 6 Wire O2 P07 6 Wire O2 P07(thanks Deluded / Raver Motorsports)

• P05 : 92-95 OBD1 Civic CX (D15B)
• P06 : 92-95 OBD1 Civic DX (D15B) scan (Thanks Katman!)
• P28 : 92-95 OBD1 Civic Si/Ex (sohc vtec d16z6) scan of auto scan of auto (thanks turboef9) scan of ECU modded by Erick's racing scan of manual ECU USDM/JDM (Thanks Katman)
• P30 : 92-95 OBD-1 Del Sol? DOHC Vtec Si/EG Si R? ECU (Thanks Katman!)
• P61 : 92-93 OBD-1 USDM GSR B17A DOHC vtec
• PR3 : 92-93 OBD-1 JDM Integra RSi/XSi (B16A) ECU
• PR4 : 92-93 OBD1 Integra RS/LS/GS (DOHC) scan (Thanks Katman!)

• P72 : 94-95 OBD-1 Integra GSR (1.8L B18C? DOHC Vtec) identify scan funky AT ECU (Thanks Katman)
• P74 : 92-95 OBD-1 Integra LS/GS (1.8L B18B) scan (Thanks Katman!)
• P75 : 92-95 OBD-1 Integra LS/GS (1.8L B18B) scan (Thanks Katman!)

• P08 : 92-95 OBD1 Civic/CRX VTi/VXi (sohc vtec) scan (Thanks Katman!) manual scan manual scan auto scan auto scan (Thanks eg6ajk)
• P27 : 92-95 OBD1 Euro/Asian Civic (non-vtec 1.6l)
• P29 : 92-95 OBD-1 JDM Domani (Dohc zc)
• P54 : 92-95 OBD-1 JDM Domani/1.8l Accord (1.8L B18B DOHC) scan scan (Thanks eg6ajk)
• P70 : 92-95 OBD-1 Domani (sohc vtec zc - no oil pressure sensor reading)
• P71 : 92-95 OBD-1 Integra (sohc vtec d16a)
• P76: 94-95 OBD-1 JDM Integra (sohc zc)
• P84 : 92-95 OBD-1 JDM Civic ETi (VTEC-E auto)
• P91 : 92-95 OBD-1 JDM Civic Coupe (sohc vtec 1.6) identify scan (Thanks Katman)

• P1 J : 96-00 OBD-1 UK manufactured Civic with D14 engines - 75hp or 90hp
• P1 K : 96-00 OBD-1 UK manufactured Civic with D14 engines - 75hp or 90hp

OBD1 92-95 (ish) Prelude/Accord

• P0 A : 94-95 OBD-1 Accord EX
• P0 B? : 92-95 OBD-1 Accord 2.2L (??? F22B SOHC non-vtec)
• P0 C : 92-95 OBD-1 Accord 2.2L (??? F22B DOHC non-vtec)
• PT3 : 90-93 OBD-1 Accord F22A1
• PT5 : 90-93 OBD-1 EDM Accord F20A7
• PT6? : 91-93 Accord, non-VTEC OBDI Accord with F22A6 motor (IAB intake manifld)

• P11 : 92-95 OBD-1 Prelude 2.0i BB3 with F20A4 non-vtec
• P12 : 92-95 OBD-1 Prelude S F22Aa non-vtec
• P13 : 93-95 OBD-1 Prelude Vtec (H22A DOHC Vtec)
• P14 : 93-95 OBD-1 Prelude Si (non Vtec - H23A)
• P39 : 92-95 OBD-1 JDM Prelude BB4 DOHC Non-VTEC (F22B)