Comanche 4WD L6-242 40L VIN S MFI Engine Control Module: General Operation
Engine Control Module: Description and Operation
Limp-In Mode
NOTE: If the Check Engine Lamp (CEL), is illuminated during vehicle operation, the vehicle has entered limp-in.
PURPOSE
Allows reduced vehicle operation, if one or more inputs fail. (The vehicle should be driven to a service facility as soon as possible.)
OPERATION
In Limp-in mode the engine controller substitutes the input of an alternate sensor, for that of the failed sensor, and continues to monitor the faulty
sensor input.
If the faulty sensor input returns within limits, and remains within limits long enough, the engine controller will resume normal operation.