Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainFuelOBD2
What P0173 means
P0173
Fuel Trim Malfunction (Bank 2)
Generic · fuel
Data confidence90%
The control module detected a fault associated with the Fuel Trim Malfunction (Bank 2) circuit or function; the stored code identifies the affected component rather than a single failure mode.
Symptoms
MIL illuminated
Possible rough running or misfire
Possible increased fuel consumption
Possible causes
Intake leak
AIR system
fuel pressure/pump
injector(s)
EVAP canister purge valve
HO2S
Recommended checks
Read fuel trim / mixture adaptation values
Check injector circuits and compare cylinder balance
Powertrain: engine, transmission and driveline systems.
0
Generic SAE-standard code: same meaning on every make.
173
Specific fault index within the subsystem.
Frequently asked questions about P0173
What does P0173 mean?
Fuel Trim Malfunction (Bank 2). The control module detected a fault associated with the Fuel Trim Malfunction (Bank 2) circuit or function; the stored code identifies the affected component rather than a single failure mode.
Is P0173 generic or manufacturer-specific?
P0173 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P0173 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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