OBDI compared to OBDII

[XaznPKdogX]

What is the difference between the two OBD? If a car has a OBDI, does the ECU have to be piggybacked or replaced still, if modifications are done to the car?

[90CRXZCSi]

OBDI for example would be the B16A. OBDII would be the B16A2. The B16A is JDM and uses only one sensor. The B16A2 on the other hand is USDM and uses 2 sensors. The OBDI is meant for example to be put in the 92-95 Civic and the OBDII for the 96+. Those are just examples though.

[Racing Rice]

Originally posted by XaznPKdogX
What is the difference between the two OBD? If a car has a OBDI, does the ECU have to be piggybacked or replaced still, if modifications are done to the car?

when you are talking about ECU being piggybacked are you talking about like the Greddy Turbo kit or something?

[91zc]

Originally posted by 90CRXZCSi
OBDI for example would be the B16A. OBDII would be the B16A2. The B16A is JDM and uses only one sensor. The B16A2 on the other hand is USDM and uses 2 sensors. The OBDI is meant for example to be put in the 92-95 Civic and the OBDII for the 96+. Those are just examples though.

Not exactly:

non_OBD or OBD0, whichever you prefer is 88-91
OBD1 is 92-95
OBD2 is 96-??

The difference is in the amount of smog equipment and sensors the ecu "looks" at for input. HTH

[drift]

also, OBD II is self correcting to improve emissions after driving. it constantly remaps it's own fuel curve based on sensor readings to minimize emissions based on driver input.