Code result
P2575
Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
Moderate severity
What it means
The DOR deterioration sensor signal voltage reads above the upper limit — short to reference voltage or open signal return.
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
Signal wire shorted to reference voltage
highOne of the most commonly reported causes for this code — check this first.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Supply wire pinched against B+ source
lowLess common, but worth ruling out after the more likely causes.
Related help
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