What is readiness status?
To help ensure the OBD system is working properly, “readiness codes” are used to indicate whether or not monitored emissions control systems have been tested by the OBD system. Each emissions control system has its own monitor and related readiness code. If any of the readiness codes are set to “not ready” or “not complete,” the OBD system has not yet completed testing of that particular component or system. A component failure may exist, but has not yet been identified because the system testing has not been completed.
