Performing a Readiness Monitor Check

Back to automobile emissions inspection 

Some vehicle manufacturers show you how to see if the On Board Diagnotics (OBD) system is ready for an emissions inspection.

The following manufacturer-specific procedures can help determine if the required monitors are set to “Ready.” NOTE: This list is not all-inclusive, and may not work for all vehicles from that manufacturer.

Some newer Ford, Lincoln, and Mercury vehicles:
Turn the ignition switch to the “ON” position for 15 seconds without starting the engine:

  • If the “Check Engine” light blinks eight (8) times, then the monitors are “Not Ready”
  • If the “Check Engine” light stays on solid, then the monitors are “Ready”

Some Jeep, Chrysler, and Dodge vehicles:
Turn the ignition switch to the “ON” position without starting the engine. The “Check Engine” light will turn on, and one of two things will happen about 15 seconds later:

  • If the “Check Engine” light blinks for about ten (10) seconds and then stays on solid, the monitors are “Not Ready”
  • If the “Check Engine” light does not blink at all and stays on solid, then the monitors are “Ready”

Some Honda and Acura vehicles:
Turn the ignition switch to the “ON” position without starting the engine.
The “Check Engine” light will come on for 20 about seconds, and then one of the following things will happen:

  • If the “Check Engine” light blinks five (5) times, then the monitors are “Not Ready”
  • If the “Check Engine” light goes off, then the monitors are “Ready”

Vehicles with known Readiness Monitor issues

Colorado Emissions Technical Centers 

The State of Colorado operates six Emissions Technical Centers which can also check Readiness Monitors: 888-861-2646