Volvo All Engines (2017 Emissions) Fault Code: P103C00 PID: EMS SCR NOx Catalyst Efficiency Inducement

Volvo All Engines (2017 Emissions) Fault Code: P103C00 PID: EMS SCR NOx Catalyst Efficiency Inducement

Circuit description
The NOx sensor measures the amount of NOx in the exhaust system. The NOx sensor is connected in the J2284/ISO data link. This diagnostic trouble code (DTC) indicates a NOx monitoring failure. For example; NOx sensor short- or open circuit, NOx sensor removed, NOx sensor missing signal..This function indicates that the NOx conversion efficiency is not correct

Conditions for diagnostic trouble code (DTC)
Too high NOx emissions

Probable cause
1) Contaminated fluid
2) Faulty Combined tank unit
3) Aftertreatment diesel exhaust fluid (DEF) line
4) Exhaust leakage
5) Selective catalytic reduction (SCR) catalyst
6) Aftertreatment diesel exhaust fluid (DEF) dosage valve