Volvo Engine Code MID 128 PPID 270 FMI 2

MID 128 PPID 270 NOx Sensor MID 233 Fault code sent by MID 128 Engine control unit. Type of fault: FMI 2 FMI Description: • Data erratic, intermittent or incorrect Fault Condition: • Removed • Plausibility Possible Symptoms: • Malfunction indicator lamp illuminated Possible Cause: • NOx sensor removed (measures surround air) • Exhaust system leakage • Air intake leakage • Faulty NOx sensor