Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

From my understanding, OBD II does not directly tell if a car is in forward or reverse gear. I wonder what the best way to derive such information from OBD data if there is any.

Following the discussion in this post, specifically I would like to know if PID62 says forward when it is positive and reverse when it is negative. If not, is there any other other PID can reveal forward/reverse information with a foolproof mapping logic. If any, please specify the PID and the mapping logic.

share|improve this question
Sounds like from the thread you posted, what you are looking for is not open in the public realm in OBD-II info. – Pᴀᴜʟsᴛᴇʀ2 Mar 8 '14 at 0:43

As I know you could reach the negative value at PID62 even if you break with the gear box. It's not the best way to find out such a stuff. The reverse gear sensor is straight forward, and just open and close the circuit. Only the cars with this "efficient gear shift assistance stuff", that show you when to shift support this gear information ( Polo 6R and so one). But it's very special parameter and there is no official PID for it.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.