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Old 02-19-2013, 02:20 AM   #14
Registered User
Join Date: Jul 2011
Location: Charlotte NC
Posts: 2,747
My Ride: 2001 BMW 330ci
Originally Posted by dslboomer View Post
You are miss informed.
Generic code readers will read all Generic OBDII codes (codes per SAE standard J/1979) and manufactures' specific codes. It may not have proper definitions for the manufactures' specific codes though.

SAE J/1979 defined codes:
P0001-P0099 - Fuel and Air Metering and Auxiliary Emission Controls
P0100-P0199 - Fuel and Air Metering
P0200-P0299 - Fuel and Air Metering (Injector Circuit)
P0300-P0399 - Ignition System or Misfire
P0400-P0499 - Auxiliary Emissions Controls
P0500-P0599 - Vehicle Speed Controls and Idle Control System
P0600-P0699 - Computer Output Circuit
P0700-P0899 - Transmission

Manufactures' specfic codes:
No, I believe I am correct. BMW specific readers will access codes that are not readable by an OBDII scanner. That is the whole reason why they exist. If an OBDII reader would give you the correct code, but an incorrect definition, then you would simply need a table to look up the correct definition. But that is not the case at all. These readers will show specific codes that are not available through an OBDII reader. there is a more thourough explanation here:
MJLavelle is offline   Reply With Quote