Testing of Readiness Codes

Your vehicle has readiness code as part of the onboard self diagnostic system.

Some states use these codes for testing to verify whether your vehicle’s emissions components are working properly.

The codes may not be read properly if testing is performed just after the battery has gone dead or been disconnected.

 

To check the state of the readiness codes, set the power mode to ON, without starting the engine. The malfunction indicator lamp will come on for 15 to 20 seconds. If the malfunction indicator lamp then turns off, the readiness codes are set. If the malfunction indicator lamp blinks five to ten times, the readiness codes are not set.

 

If you are required to have your vehicle tested and the readiness codes are not set, prepare the vehicle for testing by doing the following:

 

  1. Fill the gas tank to approximately 3/4 full.
  2. Drive the vehicle for about 10 minutes, reaching 50 to 70 mph (80 to 112 km/h) at least once during this drive, and make sure transmission is shifting throughout 10 available gears.
    ( If you want to make sure the top gear shifted properly, you can check the sequential mode gear selection indicator by using the + paddle shifter.)
  3. Park the vehicle and leave the engine off for 6 hours or more.
  4. Make sure the ambient temperature is between 40°F and 95°F (4°C and 35°C).
  5. Start the engine without touching the accelerator pedal, and let it idle for 20 seconds.
  6. Keep the vehicle in P. Increase the engine speed to 2,000 rpm, and hold it there for about 3 minutes.
  7. Let the engine idle with your foot off the accelerator for 20 seconds.
  8. Select a nearby, lightly traveled major highway where you can maintain a speed of 50 to 60 mph (80 to 97 km/h) for at least 20 minutes. Drive on the highway in D. Do not use cruise control. When traffic allows, drive for 90 seconds without moving the accelerator pedal. (Vehicle speed may vary slightly; this is okay.) If you cannot do this for a continuous 90 seconds because of traffic conditions, drive for at least 30 seconds, then repeat it two more times (for a total of 90 seconds).
  9. Drive in city or suburban traffic for at least 10 minutes. When traffic conditions allow, let the vehicle coast for several seconds without using the accelerator pedal or the brake pedal.
  10. Park the vehicle and leave the engine off for 30 minutes.
  11. If this procedure is done immediately after losing 12-volt battery power, several additional hours of driving may be required to set all codes.

 

If a testing facility determines that the readiness codes are not set, you may be requested to return at a later date to complete the test.

 

If the testing facility determines the readiness codes are still not set, see a dealer.