Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P2574 means
P2574
Direct ozone reduction catalytic converter deterioration sensor - circuit low
Generic · emissions
Data confidence78%
The control module detected that the signal in the Direct ozone reduction catalytic converter deterioration circuit stayed below the expected operating range.
Symptoms
MIL illuminated
Possible smell of unburnt fuel or reduced performance in severe cases
Possible causes
Wiring short to ground
Recommended checks
Compare upstream and downstream oxygen sensor signals
Check for exhaust leaks
Check for stored misfire or mixture codes first
Verify catalyst temperature plausibility where available
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
574
Specific fault index within the subsystem.
Frequently asked questions about P2574
What does P2574 mean?
Direct ozone reduction catalytic converter deterioration sensor - circuit low. The control module detected that the signal in the Direct ozone reduction catalytic converter deterioration circuit stayed below the expected operating range.
Is P2574 generic or manufacturer-specific?
P2574 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2574 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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