Difference Between OBD1 and OBD2 Honda
OBD1 and OBD2 are two different types of onboard diagnostics systems used by Honda vehicles. OBD1 was introduced in the early 1990s, while OBD2 was introduced in the mid-1990s. Both systems are designed to diagnose and troubleshoot engine problems, but there are some key differences between them.
The main difference between OBD1 and OBD2 is that OBD2 has more sensors and monitors than OBD1. This means that it can provide more detailed information about your vehicle’s performance. OBD2 is also more “smog” friendly and has better signaling protocols and messaging formats.
OBD1 Honda ECUs (Engine Control Units) are relatively simple to chip, while the construction of OBD2 Honda ECUs makes them tougher to chip. OBD2 includes a diagnostic port that can be connected to a reader, allowing for easier diagnosis of issues. OBD2 also includes a “learning” capability that can negate any changes in ignition timing made by spinning the distributor.
Some people prefer OBD1 because it is simpler and easier to use, while others prefer OBD2 for its more advanced diagnostic capabilities.
In terms of compatibility, OBD1 and OBD2 are not directly interchangeable. However, it is possible to convert an engine from OBD2 to OBD1 by exchanging the distributor, fuel injectors, and alternators with the correct ones.
To summarize:
– OBD1 was introduced in the early 1990s, while OBD2 was introduced in the mid-1990s.
– OBD2 has more sensors and monitors than OBD1, providing more detailed information about a vehicle’s performance.
– OBD2 is more “smog” friendly and has better signaling protocols and messaging formats.
– OBD1 Honda ECUs are simpler to chip, while OBD2 Honda ECUs are tougher to chip.
– OBD2 includes a diagnostic port for easier diagnosis of issues.
– OBD2 includes a “learning” capability that can negate changes in ignition timing made by spinning the distributor.
– OBD1 and OBD2 are not directly interchangeable, but it is possible to convert an engine from OBD2 to OBD1 by exchanging certain components .
Please note that the information provided here is based on the search results and may not cover all possible differences between OBD1 and OBD2 Honda systems.
Contents
What year did OBD1 stop?
If a car was made after 1996, it most likely has an OBD-II port so an OBD-I scanner won’t work with it. Another change between OBD-I and OBD-II is in the trouble codes. OBD-II systems access diagnostic trouble codes for Powertrain (Engine and transmission) and Emission Control Systems.
How do I know if I have OBD1 or OBD2?
one good way is to know the year of the car. 92-95 is obd1 and 96 and up is obd2. another way is to pull your cup holder and there should be a service port there. if so, then you have an obd2 car but if not then its obd1 (courtesy of slipknot95758 ).
What Hondas have OBD1?
Technical Information OBDI Vehicle Reference
| Model | Year | Suitable OBD1 ECUs |
|---|---|---|
| Civic DX | 92-95 | P72,P28,P30,P61,P08J,P30J,P72J |
| Civic Si/EX/ | 92-95 | P72,P28,P30,P61,P08J,P30J,P72J |
| Civic HX | 96-99 | P74,P75,P06,PR4,P72,P28,P30,P61,P08J,P30J,P72J |
| Civic Si | 99-00 | P72,P28,P30,P61,P08J,P30J,P72J |
How do I know if my Honda ECU is OBD1 or OBD2?
just look at the plugs. OBD1 has 3 plugs continuous and OBD2A has 3 plugs with a space between 1 of them. look for the code 37820-p72-A00 or A01…. A02 also?
What year did Honda switch to OBD2?
Does my car have OBD II? All 1996 and newer model year gasoline and alternate fuel passenger cars and trucks are required to have OBD II systems. All 1997 and newer model year diesel fueled passenger cars and trucks are also required to meet the OBD II requirements.
What year does OBD1 start?
1988 — Standardization of on-board diagnostics came in the late 1980s after the 1988 SAE recommendation that called for a standard connector and set of diagnostics. 1991 — The state of California required all vehicles to have some form of basic on-board diagnostics. This is referred to as OBD I.
When did Honda start using OBD1?
In 90-91 fuel injected Honda Preludes were produced with B20A/B21A motors that were predecessors to the current popular B-series and H-series. As I understand Hondata system will run on a 4-cylinder Honda with OBD1 harness. From the research I have determined that OBD1 Preludes were made starting in 1990 model year.
What cars have OBD1?
OBD1 was used in vehicles up to as late as 2006 and anything newer will be OBD2. Some vehicles manufactured earlier than 2006 are still OBD2 For example: You own a 2003 Toyota Corolla, this is OBD1.
Is a 1995 Honda Civic OBD1 or 2?
Almost all hondas 92-95 Run OBD1. The 90-93 Accord are all OBD1 as well. OBD1 is Super Reliable and if something does go wrong its easy to check codes. OBD2 has two sub versions, OBD2a( 96-98 ) and obd2b( 99-01+ ) After 01 Some Hondas went to CAN based computers and some stayed OBD2b for a while.
What years are OBD1?
On-Board Diagnostics – First Generation (OBD1)
With the exception of some 1994 and 1995 vehicles, most vehicles from 1982 to 1995 are equipped with some type of first-generation On-Board Diagnostics.
