Retrieving codes – Equus 3145 - Digital Ford Code Reader (1981 - 1995) User Manual
Page 51
Retrieving Codes
FAULT CODE DEFINITIONS FOR EEC-IV SYSTEMS (25 - 33)
Chapter 4
48
TEST
CODE
CONDITION
FAULT CODE DEFINITION
25
R
Knock not sensed during Dynamic
Response Test
26
O, R
(Cars ONLY): Mass Air Flow (MAF) sensor
or Vane Air Flow (VAF) sensor or
Transmission Oil Temperature (TOT)
sensor out of range
26
O, R
(Trucks ONLY): MAF sensor or circuit
fault (4.0L models)
26
O, R
(Trucks ONLY): Transmission oil
temperature sensor fault (ex. 4.0L)
27
C
(Cars ONLY): Vehicle speed sensor or
EDIS fault
27
C
Coil #2 primary circuit failure
28
O, R
(Cars ONLY): Vane Air Temperature
(VAT) sensor; EDIS or DIS fault
28
C
Loss of primary tachometer (IDM), right
side
29
C
Insufficient input from the Vehicle Speed
Sensor (VSS)
29
C
Insufficient input from programmable
speedometer/odometer module
31
O, R, C
(Cars ONLY): EVP or PFE circuit below
minimum voltage
31
O, R, C
(Trucks ONLY): EGR valve control sensor
fault (ex. V8 models)
31
O, R
(Trucks ONLY): EVAP control system
below minimum voltage
32
R
(Cars ONLY): EGR valve control system
signal out of specification
32
R, C
(Cars ONLY): EGR valve not seated
32
R, C
(Trucks ONLY): EGR pressure feedback
fault (1985-89 models)
32
O, R, C
(Cars ONLY): EVP voltage low (SONIC) or
EPT circuit voltage low (PFE)
33
R, C
(Cars ONLY): EGR valve not opening
properly
33
R, C
(Trucks ONLY): EGR valve fault / not
closing properly / TPS fault (Diesel)
4