P22AFO2 Sensor Reference Voltage Performance Bank 1 Sensor 2
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P22AF means
P22AF
O2 Sensor Reference Voltage Performance Bank 1 Sensor 2
Generic · emissions
Data confidence65%
The control module detected a fault associated with the O2 Sensor Reference Voltage Performance Bank 1 Sensor 2 circuit or function; the stored code identifies the affected component rather than a single failure mode.
Symptoms
MIL illuminated
Possible increased fuel consumption
Possible unstable idle
Possible causes
Aged or contaminated oxygen sensor
Sensor heater circuit fault
Wiring or connector fault
Exhaust leak near the sensor
Mixture fault upstream of the sensor
Recommended checks
Read live sensor voltage/current and heater status
Inspect wiring and connectors
Check for exhaust leaks near the sensor
Check fuel trim values for upstream mixture faults
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
2AF
Specific fault index within the subsystem.
Frequently asked questions about P22AF
What does P22AF mean?
O2 Sensor Reference Voltage Performance Bank 1 Sensor 2. The control module detected a fault associated with the O2 Sensor Reference Voltage Performance Bank 1 Sensor 2 circuit or function; the stored code identifies the affected component rather than a single failure mode.
Is P22AF generic or manufacturer-specific?
P22AF is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P22AF 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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