P2576
Generic (SAE) Basic entry
Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
Severity
Medium
Typical repair cost
40 – 350 EUR
System
Powertrain
What it means
P2576 is stored when the Direct Ozone Reduction Catalyst Deterioration signal drops out or jumps erratically for short periods. Intermittent faults are almost always connector, wiring or vibration related.
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Symptoms
- Check engine light on
- Rough or unstable idle
- Hesitation or poor acceleration
- Increased fuel consumption
- Possible limp mode with reduced power
Common causes
- Damaged, chafed or corroded wiring in the Direct Ozone Reduction Catalyst Deterioration circuit
- Corroded, loose or water-damaged connector terminals
- Failed Direct Ozone Reduction Catalyst Deterioration component (sensor, solenoid or actuator)
- Poor ground connection for the module or component
- Faulty control module driver (rare, confirm all else first)
How to diagnose
- Read freeze frame data and note when the code set (cold start, under load, after rain)
- Inspect the Direct Ozone Reduction Catalyst Deterioration connector for bent pins, corrosion and water; wiggle the harness with the engine running and watch live data
- Measure supply voltage and ground at the connector with the key on
- Check the signal wire for shorts to ground or battery and for continuity to the control module
- Test or substitute the Direct Ozone Reduction Catalyst Deterioration only after wiring and connectors are confirmed good
- Clear the code and complete a drive cycle to confirm the repair
Frequently asked questions
Can I keep driving with P2576?
Usually yes for a short time, but expect reduced performance or higher fuel use. Have it diagnosed within a few days.
Will clearing P2576 fix it?
No. Clearing only erases the stored code; it returns as soon as the monitor runs again unless the cause is repaired.
Related codes
Nearby codes in this group
- P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
- P2577Direct Ozone Reduction Catalyst Efficiency Below Threshold
- P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- P2573Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
- P2572Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
- P2571Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic
- P2570Direct Ozone Reduction Catalyst Temperature Sensor Circuit High
- P2569Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low