THE MIL IS ILLUMINATED WITH OXYGEN SENSOR FAULTS STORED: One of the following faults may be stored in the digital motor electronics (DME) either as part of diagnosing a different issue; and/or an illuminated malfunction indicator lamp (MIL). Fault code Control module Fault code text 13900 DME Oxygen sensor after catalytic converter from rich to lean: Delayed response Or: 12B011 DME Oxygen sensor 2 after of catalytic converter from rich to lean: Delayed response This situation is not associated with any drivability complaints. An unfavorable DME diagnostic calibration may cause a fault code to be erroneously stored. These faults will cause the MIL to illuminate.
