P2573
Generic (SAE) Basic entry
Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/Performance
Severity
Medium
Typical repair cost
60 – 500 EUR
System
Powertrain
What it means
P2573 is stored when the Direct Ozone Reduction Catalyst Deterioration signal is electrically valid but does not make sense compared with other sensors or the expected operating range. The circuit is usually fine; the component or what it measures is out of specification.
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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
- Direct Ozone Reduction Catalyst Deterioration worn, contaminated or out of calibration
- Mechanical problem in the system the sensor measures
- Air, vacuum or exhaust leak influencing the reading
- Wrong or low-quality replacement part
- Wiring resistance causing a small voltage offset
How to diagnose
- Compare the live Direct Ozone Reduction Catalyst Deterioration reading with a known-good value or a second sensor at idle and at 2500 rpm
- Check for air, vacuum or exhaust leaks that could skew the reading
- Inspect the component for contamination and clean it if the design allows
- Verify the part number is correct for the engine
- Replace the Direct Ozone Reduction Catalyst Deterioration if the reading remains out of specification
Frequently asked questions
Can I keep driving with P2573?
Usually yes for a short time, but expect reduced performance or higher fuel use. Have it diagnosed within a few days.
Will clearing P2573 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
- P2572Direct Ozone Reduction Catalyst Deterioration Sensor Circuit
- P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- P2571Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/Erratic
- P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
- P2570Direct Ozone Reduction Catalyst Temperature Sensor Circuit High
- P2576Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/Erratic
- P2569Direct Ozone Reduction Catalyst Temperature Sensor Circuit Low
- P2577Direct Ozone Reduction Catalyst Efficiency Below Threshold