P2056Reductant Injection Valve Circuit/Open Bank 2 Unit 2
Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P2056 means
P2056
Reductant Injection Valve Circuit/Open Bank 2 Unit 2
Generic · emissions
Data confidence85%
The control module detected an interruption (open circuit) in the Reductant Injection Valve circuit, so the expected electrical continuity was not present.
Symptoms
MIL or SCR/AdBlue warning illuminated
Possible start-count-down or torque limitation on some applications
Possible causes
Wiring
reductant injector
Recommended checks
Read NOx sensor values and dosing system status
Check reductant level and quality data
Inspect dosing valve, lines and heater operation
Check wiring and connectors of the SCR components
Check for OEM technical bulletins and software updates
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
056
Specific fault index within the subsystem.
Frequently asked questions about P2056
What does P2056 mean?
Reductant Injection Valve Circuit/Open Bank 2 Unit 2. The control module detected an interruption (open circuit) in the Reductant Injection Valve circuit, so the expected electrical continuity was not present.
Is P2056 generic or manufacturer-specific?
P2056 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2056 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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