What is a readiness monitor?
1998 and newer light-duty vehicles have built-in monitoring systems that can detect when emissions control systems have a fault that may cause excess emissions. These monitoring systems perform various checks under certain operating conditions and also give an indication of whether those checks have been performed or not. These indicators are called readiness monitors. If any of the readiness monitors are Not Ready, that means that the system cannot provide a complete picture of the vehicle’s emissions control system health. Resolving this situation requires that the vehicle be operated under the circumstances prescribed by the manufacturer that will allow all of the necessary self–diagnostic checks to complete. See your repair centre for more specific information. If all readiness monitors are set to Ready, that means that the various emissions control systems have been tested and the OBD system can provide a complete picture of the overall emissions control system health.
