What Does P2575 Mean?
The PCM is receiving a voltage signal from the Direct Ozone Reduction catalyst deterioration sensor that exceeds the acceptable threshold. This indicates a high voltage condition in the sensor circuit.
Common Causes
35%
Open circuit in sensor signal wire or ground wire
30%
Failed deterioration sensor with internal open circuit
20%
Disconnected or damaged sensor connector
10%
Short to voltage in sensor signal circuit
5%
PCM internal fault causing biased high reading
Diagnostic Steps
1
Step 1: Verify sensor connector is fully seated and not damaged or corroded
2
Step 2: Measure sensor output voltage (reading near 5V indicates open circuit)
3
Step 3: Disconnect sensor and check for continuity in signal and ground wires from sensor to PCM
4
Step 4: Check for short to battery voltage using multimeter with sensor disconnected
5
Step 5: Test sensor by measuring its internal resistance and comparing to specifications
Estimated Repair Cost
$150 - $550
Parts + labor, varies by vehicle and location
The PCM is receiving a voltage signal from the Direct Ozone Reduction catalyst deterioration sensor that exceeds the acceptable threshold. This indicates a high voltage condition in the sensor circuit.
The most common cause of P2575 (Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High) is: Open circuit in sensor signal wire or ground wire
Typical repair costs for P2575 range from $150 to $550, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to operate vehicle. Emissions monitoring capability is reduced and may result in emissions test failure.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2575 to identify the root cause.
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Quick Info
Category
Powertrain
System
Emissions Control System
Difficulty
Type
Generic (SAE)
Recommended Tools
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