Reductant Injection Valve Circuit/Open Bank 1 Unit 1
Table of contents
P2047 MERCEDES-BENZ Possible Causes
- Faulty Injector
- Injector harness is open or shorted
- Injector circuit poor electrical connection
How do I fix code P2047 MERCEDES-BENZ?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- There is a Factory Service Bulletin for the various Mercedes-Benz models.
- Mercedes-Benz Factory Service Bulletin OBDII Code P2047
Cost of diagnosing the P2047 MERCEDES-BENZ code
The cost of diagnosing the P2047 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P2047 MERCEDES-BENZ Description
Some manufacturers are now using a diesel exhaust fluid (DEF) system commonly called a selective catalytic reduction (SCR) system to reduce harmful oxides of nitrogen (NOx). The diesel exhaust fluid is a Urea based solution of approximately 32% Urea and 64% distilled water. The solution is injected into the exhaust gas stream upstream of the SCR catalyst. Once in the exhaust system it decomposes and becomes Ammonia (NH3) and Carbon dioxide (CO2). Within the catalyst the NH3 and CO2 react with the Nox to create Oxygen (O2) and harmless Nitrogen (N2).
The system requires a storage tank for the diesel exhaust fluid, a pump with integrated level sensor, pressure sensor and fluid quality sensor, an injector fitted to the exhaust system, fluid heater and the catalyst.
The system is closely monitored for correct operation as failure of the system will have a large impact on vehicle exhaust gas emissions of oxides of Nitrogen.