P2577 Possible Causes
- Faulty direct reduction ozone catalyst deterioration sensor
- Direct reduction ozone catalyst deterioration sensor harness open or shorted
- Poor electrical connection in direct reduction ozone catalyst deterioration sensor circuit
How to Fix Code P2577
Check the “Possible Causes” listed above. Visually inspect 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)
P2577 Meaning
The Engine Control Module (ECM) monitors the signal from the direct reduction ozone catalyst deterioration sensor. The ECM sets the OBDII code when the direct reduction ozone catalyst deterioration sensor signal falls outside factory specifications.