Ford Ford MCU Trouble Code Info

MCU

 

4 CYL

11

Continue With Testing

51

Low Temperature Switch

52 & 53

Idle Tracking Switch

53 Or 63

Wide Open Throttle Vacuum Switch

65

Vehicle Modified For Use At High Altitude

V6 OR V8

12

Improper Idle Speed

25

Knock Detection System Inoperative

41

EGO Always Lean

42

EGO Always Rich

44

Thermactor Check

45

Thermactor Check

46

Thermactor Air Bypass Check, Always Not Bypassing

51 Or 55

Vacuum Switch Open

53 Or 54

Open Temperature Switch

65

Vacuum Switch Closed