P2575: Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
The P2575 code indicates that the Powertrain Control Module (PCM) has detected a high voltage signal from the Direct Ozone Reduction (DOR) catalyst deterioration sensor circuit. This sensor monitors the efficiency of the DOR catalyst, which reduces ozone emissions. A high voltage reading typically points to a short circuit, faulty sensor, or wiring issue. This code is common in vehicles with advanced emission control systems, such as certain Ford, Mazda, and Volvo models.
01. Most Common Causes
- Faulty DOR catalyst deterioration sensor
- Short circuit in sensor wiring or connector
- Corroded or damaged sensor connector
- PCM software or hardware issue
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Failed emissions test
- Possible decrease in fuel economy
- No noticeable drivability issues in most cases
03. Step-by-Step Diagnosis
Step 1: Connect an OBD2 scanner and confirm the code P2575. Check for any additional codes.
Step 2: Visually inspect the DOR sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Use a multimeter to test the sensor circuit for high voltage or short to power.
Step 4: If wiring is intact, replace the DOR catalyst deterioration sensor.
Step 5: Clear the code and test drive to verify repair.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is generally safe to drive, but the vehicle may fail an emissions test. It is recommended to diagnose and repair the issue promptly to avoid potential damage to the emission system.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, including parts (sensor) and labor. Diagnostic fees may apply.