P2574 Possible Causes
- Faulty ozone reduction catalyst deterioration sensor
- Open or short circuit in ozone reduction catalyst deterioration sensor harness
- Poor electrical connection in ozone reduction catalyst deterioration sensor circuit
How to Fix Code P2574
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P2574 Meaning
The Engine Control Module (ECM) monitors the signal from the ozone reduction catalyst deterioration sensor. The ECM sets the OBDII code when the ozone reduction catalyst deterioration sensor signal falls outside factory specifications.