"OBD1" is generally used to refer to honda engine electronics from 92-95. Accords/Preludes used OBD1 connectors as early as 1990. This is not an official standard, unlike OBD2. OBDI ECUs (92-95)

• P05 : 92-95 OBD-1 Civic CX (D15B)

• P06 : 92-95 OBD-1 Civic DX (D15B)

• P07 : 92-95 OBD-1 Civic VX (D15Z1)

• P08 : 92-95 OBD-1 Civic/CRX VTi/VXi (SOHC VTEC)

• PR3 : 92-93 OBD-1 JDM Integra RSi/XSi (B16A)

• PR4 : 92-93 OBD-1 Integra RS/LS/GS (B18A)

• P27 : 92-95 OBD-1 Euro/Asian Civic (non-vtec 1.6l)

• P28 : 92-95 OBD-1 Civic Si/Ex (SOHC VTEC d16z6)

• P29 : 92-95 OBD-1 JDM Domani (SOHC zc)

• P30 : 92-95 OBD-1 USDM Del Sol DOHC VTEC Si/EG SiR

• P51 : 92-93 OBD-1 JDM Ascot Innova 2.3l Si-Z H23A CC-4 DOHC non-vtec

• P54 : 92-95 OBD-1 JDM Domani/1.8l Accord (1.8L B18B DOHC)

• P61 : 92-93 OBD-1 Integra GSR

• P70 : 92-95 OBD-1 Domani (SOHC VTEC zc - no oil pressure sensor reading)

• P71 : 92-95 OBD-1 Integra (SOHC VTEC d16a)

• P72 : 94-95 OBD-1 Integra GSR

• P74/75 : 94-95 OBD-1 Integra RS/LS/GS

• 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)

• P11 : 92-95 OBD-1 Prelude 2.0i BB3 (F20A4 non-vtec)

• P0 A : 94-95 OBD-1 Accord EX (F22B)

• P0 C : 92-95 OBD-1 Accord 2.2L (??? F22B DOHC non-vtec)

• P39 : 92-95 OBD-1 JDM Accord SOHC VTEC

• P13 : 93-95 OBD-1 Prelude VTEC (H22A)

• P14 : 93-95 OBD-1 Prelude Si (non VTEC - H23A)

• PT3 : 90-93 OBD-1 Accord SOHC F22A non-vtec OBD-1

• PK3 : 90-91 OBD-1 Prelude (B21a1 motor) OBD-1 Plugs

• PR7 : 91-94 OBD-1 NSX C-series V6