P2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2575 reports a deterioration-sensor signal above the valid range on a direct ozone reduction (DOR) catalyst - typical for an open circuit, a missing ground or a short to a supply voltage. No vehicle maker has published how it uses P2575, and no service bulletin naming it turned up in the NHTSA index. As an analogy, VW's 2014 CC book sends an open LIN line or a short to battery from the DOR radiator sensor to P2570. Because the DOR coating sits on the radiator, a radiator swap is the most likely moment for a connector to be left off or a wire to be damaged. P2574 covers the low side, P2576 brief dropouts. The engine runs normally; only emissions monitoring is affected.
- What you may notice
- Check engine light on
- No change in power or engine temperature
- Likely causes
- LikelyConnector left off or damaged during radiator work
- PossibleBroken signal or ground wire
- RareSignal wire shorted to a supply voltage
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €20 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.