P2056 - Reductant Injection Valve Circuit/Open Bank 2 Unit 2
- Faulty Reductant Injection Valve
- Reductant Injection Valve harness is open or shorted
- Reductant Injection Valve circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P2056 DescriptionThe Reductant Dosing Valve (Reductant Injection Valve) is used to meter and atomize the reductant liquid before it is mixed with the exhaust gas. Normal operating frequency is between 3 Hz and .3 Hz. The cooling body contains heat sink fins to keep the injector and reductant below the boiling point. If the sensed temperature is nearing the maximum temperature threshold, reductant spray will be increased in quantity to actively cool the valve.
P2056 Information for specific makes
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