P2056
Reductant Injection Valve Circuit/Open Bank 2 Unit 2
P2056 is an OBD-II diagnostic trouble code meaning: Reductant Injection Valve Circuit/Open Bank 2 Unit 2. Common causes: open or short circuit in valve circuit, reagent injection valve malfunction. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Possible reduction in engine power
- Increased NOx emissions
- SCR system fault message on the dashboard
- Increased AdBlue consumption
Causes
- Open or short circuit in valve circuit
- Reagent injection valve malfunction
- Problems with the wiring harness or connectors
- SCR control module malfunction
- Valve is dirty or clogged
How to Fix
- Check the integrity of the wiring and connectors in the valve circuit
- Check the resistance of the reagent injection valve
- Clean or replace injection valve if necessary
- Check the operation of the SCR control module
- Reset the error code and perform a system test
Related codes
Error P2056 by Vehicle Brand
FAQ
What does the P2056 code mean?
P2056 is an OBD-II diagnostic trouble code that indicates: Reductant Injection Valve Circuit/Open Bank 2 Unit 2
What causes a P2056 error code?
The most common causes of P2056 include: Open or short circuit in valve circuit; Reagent injection valve malfunction; Problems with the wiring harness or connectors; SCR control module malfunction.
How do I fix a P2056 diagnostic trouble code?
To fix P2056: Check the integrity of the wiring and connectors in the valve circuit. Check the resistance of the reagent injection valve. Clean or replace injection valve if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2056?
Yes, but get it checked soon
How much does it cost to fix P2056?
The estimated repair cost for P2056 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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