OBD Protocol Compatibility
Find which OBD protocol your vehicle uses — OBD-II CAN, KWP2000, ISO 9141, J1850 VPW/PWM, EOBD or JOBD — before you buy a scanner or adapter.
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Know your protocol
The protocol determines which scanner and adapter you need. Most modern cars use CAN; older ones use ISO 9141, KWP2000 or J1850.
- Pick your brand and model
- See the protocol, its speed and region
- General rules for cars 2008+, EOBD and JOBD
FAQ
If it is 2008 or newer, it is almost certainly OBD-II CAN. European petrol cars from 2001 use EOBD. Most scanners auto-detect anyway.
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