Codes below: You need to correct/confirm operation of the codes in question. Then we can talk.
EEC IV 2 DIGIT CODES
[EEC Tests]
NOTE: When you see "is/was" listed for a code:
For a HARD fault code the sensor IS out of range right now.
For a MEMORY code, it WAS out of range at one time (possible intermittent wire etc.).
Some codes pertain to more than one system but there will be only one of the systems on the vehicle.
For example code 58. A vehicle with a VAT sensor will not have an Idle Tracking Switch.
Differences in test mode noted as:
(O) = Key On Engine Off test
(R) = Key On Engine Running test
(M) = Memory code
11 System checks OK -
12 Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low)
13 (O) ISC did not respond properly (extends to touch throttle then retracts for KOEO)
(R) Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too high)
(M) ISC sticking, open ITS circuit or TP sticking
14 Ignition pickup was erratic
E4OD Transmission diesel RPM sensor
15 (O) No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure)
(M) KAM (pin 1) was interrupted (was battery disconnected ?)
16 1.9L & 2.5L - Throttle stop set too high
2.3L - RPM's too low
(O) Electronic ignition - IDM circuit fault
17 1.9L & 2.5L - Throttle stop set too low
18 (R) Check base timing & advance function
(M) Ignition TACH signal erratic
19 (O) No Vehicle Power (pins 37 + 57) or bad PCM
(R) Erratic idle during test (reset throttle & retest)
Electronic ignition Cylinder ID sensor/circuit problem
21 Engine Coolant Temperature (ECT) sensor out of range
22 MAP (vacuum) or BARO signal out of range
23 Throttle sensor out of range or throttle set too high
24 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range
25 Knock sensor not tested (ignore if not pinging)
26 Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range
Transmission Oil Temperature (TOT) sensor out of range
27 Vehicle Speed Sensor problem
28 Vane Air Temperature (VAT) sensor out of range
2.3L w/Electronic Ignition - Cyl ID, IDM low or right coil pack failure
29 Vehicle Speed Sensor problem
EGR CODES DEPEND ON WHAT SYSTEM TYPE THE VEHICLE IS EQUIPPED WITH:
EVP is for vehicles equipped with EGR solenoid(s), with or without an EVP sensor
EVR is for vehicles equipped with an EGR Vacuum Regulator (EVR) and an EGR Valve Position (EVP) sensor
PFE is for vehicles with Pressure Feedback EGR (PFE) sensor and and an EGR Vacuum Regulator (EVR)
If you don't know what type of system you have, go to the EVP heading, which is the first one.
There are pictures under the different headings to help you identify the system.
31 EVP - (O, R, M) EVP signal is/was out of range
EVR - (O, R, M) EVP signal is/was low
PFE - (O, R, M) PFE signal is/was low
32 EVP - (R) EGR not responding properly during test
EVR - (O, R, M) EVP signal is/was low
PFE - (R, M) PFE shows low pressure, EGR not seating or memory, not seating intermittently
33 ALL - (O, M) EGR did not open/ respond during test or if memory code, did not open intermittently
34 EVP - (R) EGR did not respond properly during test EVR - (O, R, M) EVP sensor is/was high PFE - (O, R, M) PFE sensor is/was out of range
35 EVP - (R) Engine RPM's too low to test EGR system
EVR - (O, R, M) EVP sensor signal is/was high
PFE - (O, R, M) PFE sensor signal is/was high
38 Idle Tracking Switch signal was intermittent
39 Transmission Torque Converter clutch not engaging
40 SERIES FUEL/AIR INJECTION CODES ON VEHICLES WITH DUAL OXYGEN SENSORS REFER TO THE RIGHT OR REAR SENSOR. EXCEPT: 1984-1988 3.8L ENGINES: LEFT SENSOR
41 (R) System lean
(M) System was lean for 15 seconds or more (no HO2S switching)
42 (R) System rich
(M) System was rich for 15 seconds or more (no HO2S switching)
43 (R) HO2S sensor not reading (run at 2000 rpm's for 2 minutes and retest - check for HO2S switching)
(M) Was lean at WOT for 3 seconds or more
44 AIR system inoperative
45 AIR not Diverting (AIRD)
Electronic Ignition - coil primary circuit failure
46 AIR Bypass (AIRB) not working
Electronic Ignition - primary circuit failure coil 2
47 Low flow unmetered air (check for small vacuum leaks, injector o'rings, gaskets etc.)
E4OD transmission 4x4 switch/circuit problem
48 High flow unmetered air (check for large vacuum leak, inlet hoses etc.)
Electronic Ignition - coil primary circuit failure
49 Electronic Ignition - spout signal circuit problem
Transmission 1/2 shift problem
51 Engine Coolant Temperature (ECT) sensor signal is/was too high
52 Power Steering Pressure Switch/circuit open
(R) Did you turn wheel during test ?
53 Throttle Position sensor too high
54 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high
55 No or low (under 7.5 V) Key Power to PCM pin 5
56 Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high
Transmission Oil Temperature sensor too high
57 Intermittent in Park/Neutral/ Switch or Neutral Pressure switch circuit
1990 Scorpio - Octane jumper installed (information only code - to inform you if it is installed or not)
58 Idle Tracking Switch (ITS) signal problem
Vane Air Temperature (VAT) sensor out of range or open
59 AXOD 4/3 circuit fault
3.0L SHO - Low speed fuel pump circuit problem
Transmission 2/3 shift problem
1990 Scorpio - Idle jumper installed (information only code - to inform you if it is installed or not)
61 Engine Coolant Temperature (ECT) sensor is or was too low
62 AXOD (KOEO only) 3/2 circuit short to ground
AXOD (KOEO AND KOER) 4/3 circuit failure
E4OD excessive converter clutch slippage
63 Throttle Position Sensor (TPS) signal too low
64 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded
65 Check intermittent HO2S (signal or ground)
(R) E4OD truck - cycle OD cancel switch after engine ID is received
1984 3.8L ONLY - O, M Battery voltage high (check for electrical system overcharging)
66 Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low
Transmission Oil Temperature (TOT) signal low (possibly grounded)
67 Park/Neutral circuit fault
Transmission Manual Lever Position (MLP) sensor circuit
(M) Intermittent Park Neutral Position (PNP) sensor fault
68 Idle Tracking Switch (ITS) circuit (possibly grounded)
Vane Air Temperature (VAT) sensor out of range or grounded
3.8L AXOD -Transmission Temperature Switch (TTS) open
Electronic Transmission - Transmission Oil Temperature (TOT) sensor was overheated
69 AXOD transmission (O) 3/2 switch closed (possible short circuit)
AXOD (M) 3/2 switch open (poss short to power)
E4OD 3/4 shift problem
70 (M) 3.8L AXOD - Data link to instrument cluster fault. Service any other EEC codes, erase memory and retest.
If code is still present refer to instrument cluster diagnosis manual.
71 (M) 1.9L TBI, 2.3L TBI, 2.5L TBI - ITS signal was grounded when throttle should have been opening ITS
ISC motor problem or Idle Tracking Switch (ITS) signal wire shorted to ground
(M) 1.9L MFI - PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem
(M) 3.8L AXOD - Data link to instrument cluster fault - See code 70
72 (R) No MAP or MAF change in "goose" test - retest, check for frequency or voltage change
(M) 1.9L MFI - VPWR circuit to PCM was intermittent
(M) 2.3L T/C - PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem
(M) 3.8L AXOD - Message center data link circuit fault - See code 70
73 (O) Rerun test, if 73 is still output replace TPS
(R) No Throttle Position Sensor (TPS) change in "goose" test. Must get at least 25% throttle rotation
74 Was brake depressed after engine ID was received ?
Brake On Off (BOO) signal open or short to ground
75 Brake On Off (BOO) signal shorted to power
76 Vane Air Flow (VAF) did not respond to "goose" test
77 System did not receive "goose" test - see TESTS
78 (M) VPWR circuit to PCM was intermittent or the PCM is bad
79 A/C is on or pin 10 is shorted to power
80 SERIES CODES GENERALLY ARE CIRCUIT PROBLEMS THAT COULD BE WIRING, RELAY OR SOLENOID RELATED.
ONLY ONE OF THE CIRCUITS LISTED UNDER THE CODE IS USED ON EACH VEHICLE. THE FAULT IS IN WHICHEVER SOLENOID OR CIRCUIT IS PRESENT ON THE VEHICLE
81 Boost control solenoid
AIRD solenoid
3.0L SHO - Inlet Air Solenoid
82 2.3L TC - Fan Control wire shorted to ground
AIRB solenoid
3.8L SC - Super Charger Bypass Solenoid
83 High Electro Drive Fan circuit fault
EGR Control solenoid
3.0L SHO - Low Speed Fuel Pump Relay circuit
84 EGR Vacuum Regulator
EGR cutoff solenoid
EGR Vent solenoid
85 2.3L T/C Automatic - 3/4-4/3 Shift solenoid
CANP solenoid (ALL 1989)
(M) 1.9L MFI - System has corrected rich condition
86 2.3L or 2.9L Truck - A4LD 3/4 shift solenoid
(M) 1.9L MFI - System has corrected lean condition
87 (O) Fuel pump circuit fault (check inertia switch)
Vehicles with 2BBL carb - Temperature Compensated Accelerator Pump Solenoid
(M) intermittent in fuel pump primary circuit
NOTE: On some Escorts with automatic seat belts this code is normal IN MEMORY due to the wiring
88 Throttle Kicker Solenoid
Variable Voltage Choke relay circuit fault
Fan Control circuit fault
A4LD - Converter Clutch Override solenoid
Electronic Ignition - IDM, DPI or spout circuit fault
89 A4LD - Converter Clutch Override solenoid
AXOD Torque Converter Control solenoid circuit
Exhaust Heat Control (heat riser) solenoid circuit
90 SERIES FUEL/AIR INJECTION CODES ON VEHICLES WITH DUAL OXYGEN SENSORS REFER TO THE LEFT OR FRONT SENSOR. EXCEPT: 1984-1988 3.8L ENGINES: RIGHT SENSOR
91 (R, M) System running lean
Transmission SS 1 circuit/solenoid problem
92 (R) System running rich
Transmission SS 2 circuit/solenoid problem
93 (O) Throttle linkage binding or bad ISC motor (R) HO2S not reading
Transmission TCC circuit/solenoid problem
94 AIR system inoperative
Transmission TCC circuit/solenoid problem
95 (O) Fuel pump: open, bad ground or always on
(R) AIR not Diverting (AIRD)
(M) Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal)
96 (O) Fuel pump monitor circuit shows no power
(R) AIR Bypass (AIRB) not working
(M) (Service 87 code first if present) Fuel pump relay or battery power feed was open
97 E4OD OD cancel light circuit failure
98 (R) Did not pass KOEO yet (Get 11 in KOEO first)
Transmission EPC circuit/solenoid failure
99 (R) ISC needs to learn (Let idle for 2 minutes; Erase memory and retest)
Transmission EPC circuit/solenoid failure
[EEC Tests]