P2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2574 is set when the deterioration sensor circuit of a direct ozone reduction (DOR) catalyst reads below its valid range, the usual signature of a short to ground or a failed sensor pulling the line down. No manufacturer documents P2574 publicly. The nearest documented analogue is P2569 on VW's 2.0 L TSI models, where the 2014 Tiguan book attributes a grounded LIN line of the radiator sensor to that code. A DOR catalyst only cleans the ambient air flowing through the radiator, so engine output, cooling and fuel use stay the same; the consequence is a warning lamp and possibly a failed OBD inspection. P2575 is the opposite fault, P2572 the general circuit code.
- What you may notice
- Check engine light on
- Car drives and cools as before
- Likely causes
- LikelySensor wire shorted to ground at the radiator
- PossibleDeterioration sensor failed internally
- 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: €40 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.