Readiness Test Status

READINESS TEST STATUS
The ECM records whether a good or bad judgment has been made about the main diagnostic items given below after the completion of a previous monitoring operation.
This record can be read using the scan tool. (When using the scan tool, the word "Complete" appears on the display if the judgment operation has been completed.)
Furthermore, this record is reset if the battery terminals are disconnected or if the DTC is erased.
To complete the readiness test status which has been reset, the "OBD-II Drive Cycle" related to a diagnosis item should be carried out.

NOTE: If the vehicle is normal, the readiness test status will be complete by carrying out the "OBD-II Drive Cycle" once. If the ECM detects a malfunction of the vehicle, the readiness test status will be complete by carrying out the "OBD-II Drive Cycle" twice. In addition, after all readiness test statuses are complete, a DTC should be interrogated.
If a DTC is stored, perform repair by referring to the relevant DTC procedures. Then complete the readiness test status by repeating the "OBD-II Drive Cycle."
If a DTC is not stored, no further action will be needed.
- Catalyst: P0420 <2.0L Engine (Turbo), 2.4L Engine - Federal>, P0421 <2.4L Engine - California>
- Evaporative system: P0442, P0455
- Heated oxygen sensor: P0130, P0136
- Heated oxygen sensor heater: P0135, P0141
- EGR system: P0400