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What is OBD1 and OBD2 honda?

OBD1 and OBD2 are two different diagnostic systems used in Honda vehicles, each with its own set of features and capabilities. OBD1, or On-Board Diagnostics 1, was the first generation of on-board diagnostic systems introduced in the early 1990s, while OBD2 is the more advanced second-generation system that became mandatory for all vehicles sold in the United States starting in 1996.


OBD1 in Honda Vehicles


OBD1 was a basic diagnostic system that allowed mechanics to access and read diagnostic trouble codes (DTCs) stored in the vehicle's computer. These codes could be used to identify and diagnose various issues with the vehicle's engine and emissions systems. OBD1 systems were relatively simple and did not provide much detailed information beyond the DTCs.


In Honda vehicles, OBD1 was used from the late 1980s until the mid-1990s. To access the OBD1 system, mechanics would need to use a specific diagnostic tool or scan tool that could communicate with the vehicle's computer and retrieve the DTCs.


OBD2 in Honda Vehicles


OBD2, on the other hand, is a more advanced diagnostic system that provides much more detailed information about the vehicle's systems. OBD2 systems can monitor a wide range of sensors and components, and they can provide real-time data about the vehicle's performance and any issues that may be present.


Honda vehicles have used OBD2 systems since the mid-1990s, and all Honda vehicles sold in the United States since 1996 have been equipped with OBD2 systems. OBD2 systems use a standardized diagnostic connector and communication protocol, which allows mechanics to use a wide range of diagnostic tools and scan tools to access the vehicle's data.


Key Differences Between OBD1 and OBD2



  • Diagnostic Capabilities: OBD2 systems can monitor a much wider range of sensors and components than OBD1 systems, providing more detailed information about the vehicle's performance and any issues that may be present.

  • Standardization: OBD2 systems use a standardized diagnostic connector and communication protocol, while OBD1 systems were more proprietary and required specific diagnostic tools.

  • Emissions Monitoring: OBD2 systems are designed to monitor the vehicle's emissions systems more closely, helping to ensure that the vehicle is meeting emissions standards.

  • Real-Time Data: OBD2 systems can provide real-time data about the vehicle's performance, while OBD1 systems were limited to retrieving diagnostic trouble codes.


Overall, the transition from OBD1 to OBD2 in Honda vehicles has provided mechanics and owners with much more detailed and comprehensive information about the vehicle's systems, making it easier to diagnose and repair issues.

What year did cars get OBD2?


1996
OBDII included a series of standardized diagnostic trouble codes (DTCs). 1996 — OBD-II becomes mandatory for all cars manufactured in the United States.



What cars use 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.



What is the difference between Honda OBD1 and OBD2?


OBD1 systems are more basic and less comprehensive than OBD2 systems. OBD1 systems typically only monitor emission control systems, while OBD2 systems monitor a wide range of engine and emission control systems, as well as other systems such as the transmission, ABS, and airbags.



How do I scan my Honda OBD1?


And then after you count the flashes. You can you know just Google OBD 1 Honda ECU codes and then you'll just count the flashes. And figure your engine out engine. Light out that. Way.



What year did OBD1 stop?


It was used by General Motors between the years of 1994 and 1995 and was cataloged as either OBD-I or OBD-II at the time.



Is OBD2 still used?


OBD2 was introduced in 1996 and included many more features. This new standard was developed to be future-proof, unlike OBD1, and is still used today.



What year Hondas are OBD1?


Technical Information OBDI Vehicle Reference

ModelYearSuitable OBD1 ECUs
Civic96-99P74,P75,P06,PR4,P72,P28,P30,P61,P08J,P30J,P72J
Civic99-00P74,P75,P06,PR4,P72,P28,P30,P61,P08J,P30J,P72J
Integra XSi89-91P72,P28,P30,P61,P08J,P30J,P72J (OBD1 conversion required)
Integra LS/GS92-93P74,P75,P06.PR4,P72,P28,P30,P61,P08J,P30J,P72J



What year is OBD2?


1996
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.



How do I tell if my car is OBD1 or OBD2?


If your car was manufactured in 1996 or later, it definitely has an OBD2, so you need an OBD2 scan tool to communicate with the car's diagnostic system. Since OBD1 is not standardized, OBD1 scan tools are usually only available for specific brands and models. Therefore, the type of OBD1 scanner you need may different.



How do I know if my car has OBD2?


There will be a note on a sticker or nameplate under the hood stating "OBD II compliant" or "OBD II Certified".


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.