Volvo All Engines (2017 Emissions) Fault Code: P220F93 PID: EMS NOx Sensor Incorrect Value at Startup

Volvo All Engines (2017 Emissions) Fault Code: P220F93 PID: EMS NOx Sensor Incorrect Value at Startup

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.

Conditions for diagnostic trouble code (DTC):
1) Calibration value out of range
2) Internal NOx sensor heating failure

Probable cause
1) NOx sensor