Code result
P2573
Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
Moderate severity
What it means
The DOR deterioration sensor is electrically intact but its readings drift or do not match the model — for example a deterioration value that does not move with km/h driven, or moves implausibly fast.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Aged sensor with offset drift
highOne of the most commonly reported causes for this code — check this first.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Sensor mounting loose - signal damping
lowLess common, but worth ruling out after the more likely causes.
Related help
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