P2577 Direct ozone reduction catalytic converter - efficiency below threshold

Direct ozone reduction catalytic converter - efficiency below threshold. The control module calculated that Direct ozone reduction catalytic converter efficiency dropped below the calibrated threshold for this application.

P2577 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.