VOLVOUU 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
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