Whether you are planning a Honda engine swap or planning a turbo VTEC build, you need to pick the right Honda ECU. If you have swapped a VTEC engine there are many reasons why you could use our Honda ECU list. With so many different Honda ECU part numbers and interchangeability, the proper planning can really help you save time and money.
If you own a Honda Civic and want to modify it, you’ll need the right ECU. Picking the right Honda engine to swap into your car is just one part of the equation. This Honda ECU guide can help you wire in a piggyback computer or similar engine management device like the Super AFC.
Today I’ll be showing you a complete listing of Honda ECU part numbers to pick from, the generation of vehicle they came in and where you can find them.
Honda ECU Master List
This comprehensive list of Honda engine computers is easy to use. We’ll kick off the listing with the OBD0 units below, and work through the different generations until ending at the OBD2 Hondas.
P0A – This OBD0 Honda ECU is found in the 1990-1995 Honda Accord. This generation of Accord utilized the SOHC 2.2 liter F22A Honda engine. It’s not a common Honda engine swap, but the chassis is still fairly popular today.
PG6 – Earlier OBD0 models of the Integra, this Honda ECU is found in the 1988-1989 Acuras.
PM5 – One of the most popular Honda vehicles on this list, the 1988-1991 Honda Civic was also known as the CRX. This vehicle like most in the first group of Hondas is another OBD0 vehicle.
PM6 – First groups of the CRX Si that is still a common Honda engine swap platform used this OBD0 Honda ECU. This unit is found in the 1988-1991 Honda CRX SOHC Si as well as the Civic.
PM7 – Our first JDM Honda on this list the PM7 Honda ECU is found in the 1988-1991 Honda EF, but only in the JDM models with the ZC Engine. This ECU is a OBD0 model and will require conversion if you are stepping up to a OBD1 or OBD2 engine.
PM8 – The 1988-1991 OBD0 Honda CRX HF is where you can find the PM8 ECU. Using the SOHC 1.5 liter engine, this vehicle is greatly desired for the light curb weight.
PR2 – The first EDM Honda on our list, the 1988-1991 Honda ZC engine is the one that uses this PR2 ECU.
PR3 – Earliest models of the Integra used this ECU, specifically the 1989-1991 Acura XSi/RSi trims. Of course this is another OBD0 Honda ECU and will require replacement for your Honda swap.
PR4 – You’ll be ditching this ECU when planning a LS VTEC conversion in your 1990-1993 Acura Integra LS or GS.
PR3-J00 – One of the earliest Integra DA models, the 1992 JDM Acura Integra used a DOHC engine. This Honda ECU is also found in the same year range of JDM B16A Honda CRX / EF
PS9 – Rare and difficult to find the 4 door 1988-1991 Honda Civic EX utitlized this ECU, and came with an automatic transmission.
PW0 – The last of the OBD0 ECUs on this list is found in the 1989-1991 Honda Civic as well as the CRX SiR. This ECU is also in the automatic transmission equipped 1990-1991 Integra XSi.
OBD1 Honda ECU List
P05 – The first group of OBD1 Civic EG chassis used this ECU, and was found in the 1992-1995 Honda Civic CX.
P06 – Found in the 1992-1995 Honda Civic DX, this ECU is usually discarded when stepping up to a VTEC engine swap.
P07 – Our personal favorite Honda Civic with the incredible curb weight and already VTEC, this ECU is in the 1992-1995 Honda Civic VX. The Civic VX averaged 48 mpg long before anyone knew what a Prius was.
P08 – The JDM 1992-1995 OBD1 Honda Civic with a 1.5 liter D15B engine used this ECU. It’s not very common here in the States however.
P0A – Commonly discarded by those looking to step up to the VTEC H22 Prelude engine, this ECU is found in the OBD1 1994-1995 Honda Accord EX.
P13 – Great for any Honda engine swap and easily modified and chipped, this unit is in the 1992-1995 Honda Prelude VTEC using the DOHC 2.2 liter H22A engine.
P14 – Known for the earliest of four wheel steering setups, the 1992-1995 Honda Prelude Si came with the 2.3 liter DOHC H23A.
P27 – This JDM ECU is in the 1992-1995 Honda Civic EG with a SOHC 1.6 liter engine.
P28 – Easily one of the most commonly chipped Honda ECU found in many Honda swaps, this VTEC ECU is in the 1992-1995 Honda Civic EX, Si as well as the VTEC Honda Del Sol Si.
P30 – Not quite as common as the P28 the P30 is still a very popular choice when it comes to Honda swaps and converting to VTEC. This one is found in the OBD1 1992-1995 Honda Del Sol with the 1.6 DOHC VTEC B16 as well as the SiR models.
P61 – The black sheep of the Integra DA, this ECU is in the 1.7 liter DOHC B17A. You will need to locate a 1992-1993 Acura Integra GSR to locate this unit.
P72 – The second most popular Honda ECU on our list. This ECU is commonly chipped and modified for turbocharged or supercharged purposes. You can source this ECU in the 1994-1995 Acura Integra GSR. There is a OBD2 version of this ECU as well which has completely different ECU wiring.
P74 – This OBD1 ECU is in the 1992-1995 Acura Integra with the non-VTEC DOHC B18 engine. The common trim type is the Integra LS or GS.
P75 – Much like the P74 this ECU is in the OBD1 1992-1995 Acura Integra LS or GS with the non VTEC B18 engine.
OBD2 Honda ECU List
P72 – From the 1996-2001 Acura Integra GSR with the VTEC B18C1, this ECU is extremely popular. Again there is an earlier model of this vehicle, so make sure not to get confused as the ECU wiring is very different.
P75 – This is the Honda ECU you’ll be removing when planning for a LS/VTEC Swap. It’s found in the 1996-2000 Acura Integra LS and GS.
PBA – Found north of the border the 1997-2000 Acura 1.6 EL is an OBD2 Honda that’s a Canada only model.
PCT – These JDM ECUS are in the OBD2 Honda from the year range of 1997 to 2001. It’s in the JDM DC5 or Type R as well as the Civic Type R.
PCX – In the early AP1 S2000, the Honda S2000 from the year range of 1999 to 2001. With the F20C engine with a rear wheel drive layout, the S2000 has lots to offer for Honda enthusiasts.
PR4 – The early non VTEC Integra LS used this unit, and it’s found in the 1.8 liter DOHC 1996-1999 Acura Integra with the B18B engine. It carries the LS, RS or GS trim and a commonly swapped ECU for LS VTEC swaps.
P5P – The Prelude got heavier and bulkier in the 1996-1999 Type SH and Type S models. This ECU is connected to the H22A 2.2L VTEC engine and used for anyone planning a H series swap.
P2E – The next generation of Honda Civic DX, this ECU is in the 1996-1998 model years.
P2N – This OBD2 Honda Civic HX is known for their lightweight wheel rims, and is in the 1996-2000 year ranges.
P2P – One of the rare SOHC VTEC Honda ECU is found in the 1996-2000 Honda Civic EX. This model features the 1.6 liter D16Y8 and can be modified although not as easily as the P28.
P2T – Rare to find and harder to source, this computer is in the OBD2 Honda Civic Si with the 1.6 liter B16 in it.
Common Honda ECU FAQ
How can I tell if my Honda ECU is an automatic or manual transmission model? – There are segments of three digit code that follows the ECU code. These groupings of identification numbers will tell you if you have a auto or manual transmission.
For all OBD0 Honda ECU units the three digit codes break down as follows. OBD0 Manual transmission ECUs will have these three digit groupings following the ECU code.
- 000
- 001
- 002
- A00
- A01
- A10
- J00
- J001
- C01
- C00
Automatic transmissions will have these codes :
- J51
- J50
- A50
- A51
- 900
- 901
- A60
- C50
- C51
- X30
- A80
OBD1 ECU’s with a manual transmission will have these groups of three digit codes 000, 001, 002, 003, A00, A01, A02, C00, C01, C02, J00, J01, J02 and the automatic transmissions will feature J50, J51, 900, 901, 902, C50, C51, C52, A50, A51, and A52.
Have any questions about our Honda ECU Master List? leave us a comment below and let us know!