OBD-II code family
Reductant Injection Valve Circuit Faults (12 codes)
12 related fault descriptions. Use each full code and the exact vehicle service information to identify its circuit, monitored condition, and required tests.
Codes in this family
This is the complete published member list for this guide. Each code retains its own page; shared diagnostic context does not mean that every member has the same test or repair.
- P2047Reductant Injector Circuit/Open (Bank 1 Unit 1)
- P2048Reductant Injector Circuit Low (Bank 1 Unit 1)
- P2049Reductant Injector Circuit High (Bank 1 Unit 1)
- P2050Reductant Injection Valve Circuit/Open (Bank 2 Unit 1)
- P2051Reductant Injection Valve Circuit Low (Bank 2 Unit 1)
- P2052Reductant Injection Valve Circuit High (Bank 2 Unit 1)
- P2053Reductant Injection Valve Circuit/Open (Bank 1 Unit 2)
- P2054Reductant Injection Valve Circuit Low (Bank 1 Unit 2)
- P2055Reductant Injection Valve Circuit High (Bank 1 Unit 2)
- P2056Reductant Injection Valve Circuit/Open (Bank 2 Unit 2)
- P2057Reductant Injection Valve Circuit Low (Bank 2 Unit 2)
- P2058Reductant Injection Valve Circuit High (Bank 2 Unit 2)
What these codes mean
These twelve published entries cover circuit/open, low, and high faults at the defined reductant dosing bank/unit addresses. The complete member list preserves every condition and address. A bank/unit number is not proof of four valves, two physical exhaust banks, downstream position, or a particular share of the dose.
Identify the installed controller, valve, driver design and circuit from exact vehicle service information. Circuit high and circuit/open are different definitions, not universal synonyms. Ford’s covered diesel monitors illustrate why the test state and calibration matter; their thresholds are not a universal diagnostic chart.
Check actual connectors, supplies, grounds and wiring before choosing a valve or module. Do not assume sibling valves are interchangeable, swap connectors, or substitute a generic test lamp. Use only the specified output/load and circuit tests.
Work only after the stated cooling, pressure-relief and electrical-isolation procedures. Diagnose electrical faults separately from DEF quality, nozzle blockage, and SCR efficiency. Warning stages, derates, restart restrictions and reset requirements are vehicle-specific; normal running is not proof of normal emissions operation.
Identify the circuit on your vehicle
Match the full DTC, reporting module, and any failure-type suffix to the service information for your exact year, make, model, engine, and equipment. An identifier alone does not establish installed hardware count, location, connector pinout, or a universal measurement.
Where the manufacturer publishes its own meaning for this code, that is the one to work from — it describes the actual component on your vehicle, which the generic definition cannot. Keep the generic description for what it is good for: it tells you which subject area the standard assigned the code to, which is useful context when the two appear to disagree. If they do disagree, follow the manufacturer.