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How many miles to reset a Honda readiness code?

There is no set number of miles that will reset a Honda readiness code. The readiness codes are set when the vehicle's emission control system detects a problem. The codes will remain set until the problem is fixed and the vehicle has been driven through a drive cycle that allows the emission control system to test itself.

The drive cycle varies depending on the vehicle model and year. Generally, you will need to drive the vehicle for at least 20 minutes, including a mix of city and highway driving. You will also need to make sure that the vehicle reaches operating temperature and that the fuel tank is at least half full.

If you have reset the readiness codes and they come back on, it means that the problem has not been fixed. You will need to take the vehicle to a qualified mechanic to have the problem diagnosed and repaired.