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Home >> Audi >> 2012 >> Q7 3.0 TDI >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (4.2L - Generic Scan Tool - Engine Code: Bar (General Information)) >> St Generic Scan Tool >> Description And Operation >> SCR NOX Catalyst System >> Reducing Agent Metering System Pressure Sensor -G686-

Reducing Agent Metering System Pressure Sensor -G686-

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The monitor checks if the pressure values measured in the SCR line before the pressure buildup phase are within the physically possible range. The pressure sensor measures the existing pressure in the SCR line and transmits the values to the SCR control module which then transmits them to the ECM where the pressure values are monitored.

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