P2572 - Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
The P2572 code indicates a malfunction in the sensor circuit that monitors the deterioration of the direct ozone reduction catalyst. This catalyst is part of the emissions system, designed to reduce ozone-forming pollutants. The sensor detects the catalyst's efficiency; when its circuit fails, the PCM logs this code. Common causes include a faulty sensor, damaged wiring, or a poor electrical connection. This issue can lead to increased emissions and may trigger the check engine light.
01. Most Common Causes
- Faulty direct ozone reduction catalyst deterioration sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Open or short circuit in the sensor signal or reference voltage lines
- Failed PCM (rare)
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: Use an OBD2 scanner to confirm the code and check for other related codes.
Step 2: Visually inspect the sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and voltage according to manufacturer specifications.
Step 4: If the sensor and wiring are okay, check the PCM for faults or perform a circuit continuity test.
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 and the check engine light will remain on. It's recommended to diagnose and repair the issue soon to avoid potential catalytic converter damage.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the sensor price and labor rates. Most of the cost is for the sensor itself.