Ford F150 Pickup. Manual - part 1648

Fig. 1: Identifying PCM Calibration Codes - Protocol 1 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Vacuum Diagrams - Trucks

  

Fig. 2: Identifying PCM Calibration Codes - Protocol 2 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Vacuum Diagrams - Trucks

  

Fig. 3: Identifying PCM Calibration Codes - Protocol 3
Courtesy of FORD MOTOR CO. 

PROTOCOL 3 CODE DESCRIPTIONS 

Position 1 = Model Year 

Indicates last digit of model year in which calibration was first introduced. 

0 
 
2000 

1 
 
2001 

2 
 
2002  

Position 2 = Vehicle Code 

Identifies vehicle line. 

A3 
 
Windstar 

B3 
 
Expedition & Navigator 

E4 
 
Econoline 

F5 
 
F150 Pickup 

F7 
 
F250-550 Super Duty Pickup 

LQ 
 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Vacuum Diagrams - Trucks

  

Aviator 

L1 
 
Excursion 

M1 
 
Escape 

N1 
 
Blackwood 

R3 
 
Ranger 

S1 
 
Explorer Sport Trac 

U5 
 
Explorer & Mountaineer 

U7 
 
Explorer Sport 

Y3 
 
Stripped Motorhome Chassis  

Position 3 = Transmission Code 

Identifies transmission type. 

1 
 
Automatic Transmission 

2 
 
Manual Transmission  

Position 4 = Unique Calibration 

 

2003 Ford Pickup F150 

2003 ENGINE PERFORMANCE Vacuum Diagrams - Trucks