U059E Code: Meaning, Causes, and Symptoms | OBD2 Codes

U059E – Invalid Data Received From NOX Sensor ‘A’


U059E Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


U059E Possible Causes


Faulty Nitrogen Oxide (NOx) Sensor,Nitrogen Oxide (NOx) Sensor harness is open or shorted,Nitrogen Oxide (NOx) Sensor circuit poor electrical connection


U059E Description


The Nitrogen Oxide (NOx) sensor measures the amount of nitric oxide and nitrogen oxide in the exhaust system. When the NOx sensor indicates that the storage capacity has been reached, the regeneration phase is initiated by the fueling management system. The Powertrain Control Module (PCM) monitors the NOx sensor and sets the code when the NOx sensor circuit voltage reading is not within the normal operating threshold for a specific engine bank.