P0425Catalyst Temperature Sensor (Bank 1 Sensor 1)
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P0425 means
P0425
Catalyst Temperature Sensor (Bank 1 Sensor 1)
Generic · emissions
Data confidence90%
The control module detected a fault associated with the Catalyst Temperature Sensor (Bank 1 Sensor 1) circuit or function; the stored code identifies the affected component rather than a single failure mode.
Symptoms
MIL illuminated
Possible smell of unburnt fuel or reduced performance in severe cases
Possible causes
Wiring
poor connection
catalytic converter temperature sensor
ECM
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.
0
Generic SAE-standard code: same meaning on every make.
425
Specific fault index within the subsystem.
Frequently asked questions about P0425
What does P0425 mean?
Catalyst Temperature Sensor (Bank 1 Sensor 1). The control module detected a fault associated with the Catalyst Temperature Sensor (Bank 1 Sensor 1) circuit or function; the stored code identifies the affected component rather than a single failure mode.
Is P0425 generic or manufacturer-specific?
P0425 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0425 at file level?
If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.
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