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FAQ: GM Code Scanner CP9001
 
How do I know if my vehicle is OBD I or OBD II on-board diagnostics equipped?
 
What is the difference between OBD I and OBD II cars?
 
What is OBD?
 
What are DLCs?
 
Common Chrysler OBD II (P1) Enhanced Codes
 
Will the Actron Code Scanners and/or Scan Tools retrieve Anti-Lock Brake or Airbag codes?
 
Do I need adapters for different vehicles?
 
What are I/M Monitors?
 
What is MIL Status?
 
What are Pending Codes?
 
What is the Erase Codes function?
 
Which Actron Code Scanners and/or Scan Tools work on 1994 & 1995 GM vehicles?
 
What are PIDs?
 
What are DTCs?
 
What are Enhanced OBD II codes?
 
Common Generic OBD II (P0) Codes
 
Common GM OBD II (P1) Enhanced Codes
 
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  What is the difference between OBD I and OBD II cars?
  The first generation of OBD systems - known as "OBD I" - was introduced in 1981. Because each vehicle manufacturer developed its own system, there was no standardization among this generation of technology.
As a result, manufacturer-specific OBD I systems required a variety of diagnostic software and hardware. In general, OBD I vehicles were built through model year 1995.

In search of a better solution, the Environmental Protection Agency (EPA) later established standards for improved vehicle diagnostics. The resulting standards -- known as "OBD II," "Global OBD II" or "Generic OBD II" – are part of a system the Society of Automotive Engineers (SAE) developed to regulate automotive electronic diagnosis. OBD II is required for all vehicles (imported and domestic) sold in the U.S. beginning in 1996 which dictates the use of a common diagnostic link connector and software for monitoring fuel and emission systems. Technicians are able to use the same tool to test any OBD II compliant vehicle without special adapters or manufacturer-specific tools which are necessary for OBD I vehicles. This allows one tool design such as the Actron PocketScan Code Reader CP9125, OBD II AutoScanner CP9135 or SUPER AutoScanner CP9145 to connect with any passenger vehicle sold in the U.S. that is 1996 newer, thereby ensuring greater convenience and lower cost for tool manufacturers, technicians and DIYers.

OBD II systems are more sophisticated than OBD I - they seek out potential problems sooner and alert the driver to these issues through the "Check Engine" light or Malfunction Indicator Light (MIL). By alerting the owner of malfunctions as they occur, repairs can be sought promptly, which results in fewer emissions from the vehicle.

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