Differences in test mode noted as:
(O) = Key On Engine Off test
(R) = Key On Engine Running test
(M) = Memory code
Code |
Definition |
11 | System checks OK |
12 | Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low) – ISC |
13 | (O) ISC did not respond properly (extends to touch throttle then retracts for KOEO) – ISC |
(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 – Ignition Systems |
E4OD Transmission diesel RPM sensor – 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 – IDLE or Idle Set Procedures |
2.3L – RPM’s too low – IDLE | |
(O) Electronic ignition – IDM circuit fault – Ignition Systems | |
17 | 1.9L & 2.5L – Throttle stop set too low – IDLE |
18 | (R) Check base timing & advance function – Timing Tests |
(M) Ignition TACH signal erratic – Ignition Systems | |
19 | (O) No Vehicle Power (pins 37 + 57) or bad PCM VPWR Diagnosis |
(R) Erratic idle during test (reset throttle & retest) – Idle Set Procedures | |
Electronic ignition Cylinder ID sensor/circuit problem – Ignition Systems | |
21 | Engine Coolant Temperature (ECT) sensor out of range – ECT |
22 | MAP (vacuum) or BARO signal out of range – MAP |
23 | Throttle sensor out of range or throttle set too high – TPS |
24 | Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range – IAT VAT |
25 | Knock sensor not tested (ignore if not pinging) – KS |
26 | Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range – MAF VAF |
Transmission Oil Temperature (TOT) sensor out of range – Transmissions | |
27 | Vehicle Speed Sensor problem – VSS |
28 | Vane Air Temperature (VAT) sensor out of range – VAT |
2.3L w/Electronic Ignition – Cyl ID, IDM low or right coil pack failure – Ignition Systems | |
29 | Vehicle Speed Sensor problem – VSS |
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
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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 – EVP |
EVR – (O, R, M) EVP signal is/was low – EVR | |
PFE – (O, R, M) PFE signal is/was low – PFE | |
32 | EVP – (R) EGR not responding properly during test – EVP |
EVR – (O, R, M) EVP signal is/was low – EVR | |
PFE – (R, M) PFE shows low pressure, EGR not seating or memory, not seating intermittently – PFE | |
33 | ALL – (O, M) EGR did not open/ respond during test or if memory code, did not open intermittently – EVP EVR PFE |
34 | EVP – (R) EGR did not respond properly during test – EVP |
EVR – (O, R, M) EVP sensor is/was high – EVR | |
PFE – (O, R, M) PFE sensor is/was out of range – PFE | |
35 | EVP – (R) Engine RPM’s too low to test EGR system – EVP |
EVR – (O, R, M) EVP sensor signal is/was high – EVR | |
PFE – (O, R, M) PFE sensor signal is/was high – PFE | |
38 | Idle Tracking Switch signal was intermittent – ISC |
39 | Transmission Torque Converter clutch not engaging – Transmissions |
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 – Fuel control |
(M) System was lean for 15 seconds or more (no HO2S switching) – Fuel control | |
42 | (R) System rich – Fuel control |
(M) System was rich for 15 seconds or more (no HO2S switching) – Fuel control | |
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 – Fuel control | |
44 | AIR system inoperative – Air Injection |
45 | AIR not Diverting (AIRD) – Air Injection |
Electronic Ignition – coil primary circuit failure – Ignition Systems | |
46 | AIR Bypass (AIRB) not working – Air Injection |
Electronic Ignition – primary circuit failure coil 2 – Ignition Systems | |
47 | Low flow unmetered air (check for small vacuum leaks, injector o’rings, gaskets etc.) |
E4OD transmission 4×4 switch/circuit problem – Transmissions | |
48 | High flow unmetered air (check for large vacuum leak, inlet hoses etc.) |
Electronic Ignition – coil primary circuit failure – Ignition Systems | |
49 | Electronic Ignition – spout signal circuit problem – Ignition Systems |
Transmission 1/2 shift problem – Transmissions | |
51 | Engine Coolant Temperature (ECT) sensor signal is/was too high – ECT |
52 | Power Steering Pressure Switch/circuit open – PSP |
(R) Did you turn wheel during test ? | |
53 | Throttle Position sensor too high – TPS |
54 | Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high – IAT VAT |
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 – VAF MAF |
Transmission Oil Temperature sensor too high – Transmissions | |
57 | Intermittent in Park/Neutral/ Switch or Neutral Pressure switch circuit – PNP or Transmissions |
1990 Scorpio – Octane jumper installed (information only code – to inform you if it is installed or not) | |
58 | Idle Tracking Switch (ITS) signal problem ISC |
Vane Air Temperature (VAT) sensor out of range or open – VAT | |
59 | AXOD 4/3 circuit fault – Transmissions |
3.0L SHO – Low speed fuel pump circuit problem – Power / Fuel Pump Circuits | |
Transmission 2/3 shift problem – Transmissions | |
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 – ECT |
62 | AXOD (KOEO only) 3/2 circuit short to ground – Transmissions |
AXOD (KOEO AND KOER) 4/3 circuit failure – Transmissions | |
E4OD excessive converter clutch slippage – Transmissions | |
63 | Throttle Position Sensor (TPS) signal too low TPS |
64 | Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded – IAT VAT |
65 | Check intermittent HO2S (signal or ground) – Fuel Control |
(R) E4OD truck – cycle OD cancel switch after engine ID is received – Transmissions | |
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 – VAF MAF |
Transmission Oil Temperature (TOT) signal low (possibly grounded) – Transmissions | |
67 | Park/Neutral circuit fault – PNP |
Transmission Manual Lever Position (MLP) sensor circuit – Transmissions | |
(M) Intermittent Park Neutral Position (PNP) sensor fault – PNP | |
68 | Idle Tracking Switch (ITS) circuit (possibly grounded) – ISC |
Vane Air Temperature (VAT) sensor out of range or grounded – VAT | |
3.8L AXOD -Transmission Temperature Switch (TTS) open – Transmissions | |
Electronic Transmission – Transmission Oil Temperature (TOT) sensor was overheated – Transmissions | |
69 | AXOD transmission (O) 3/2 switch closed (possible short circuit) – Transmissions |
AXOD (M) 3/2 switch open (poss short to power) – Transmissions | |
E4OD 3/4 shift problem – Transmissions | |
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 |
ISC motor problem or Idle Tracking Switch (ITS) signal wire shorted to ground – ISC | |
(M) 1.9L MFI – PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem – VPWR Diagnosis | |
(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 – MAP MAF |
(M) 1.9L MFI – VPWR circuit to PCM was intermittent – VPWR Diagnosis | |
(M) 2.3L T/C – PCM re-initialized. Possible electrical noise, case ground or intermittent VPWR problem – VPWR Diagnosis | |
(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 – TPS | |
74 | Was brake depressed after engine ID was received ? |
Brake On Off (BOO) signal open or short to ground – BOO | |
75 | Brake On Off (BOO) signal shorted to power – BOO |
76 | Vane Air Flow (VAF) did not respond to “goose” test – VAF |
77 | System did not receive “goose” test – see TESTS |
78 | (M) VPWR circuit to PCM was intermittent or the PCM is bad VPWR Diagnosis |
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
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81 | Boost control solenoid – Solenoids |
AIRD solenoid – Solenoids and Air Injection | |
3.0L SHO – Inlet Air Solenoid – Solenoids | |
82 | 2.3L TC – Fan Control wire shorted to ground – A/C and Fan Circuits |
AIRB solenoid – Solenoids and Air Injection | |
3.8L SC – Super Charger Bypass Solenoid – Solenoids | |
83 | High Electro Drive Fan circuit fault – A/C and Fan Circuits |
EGR Control solenoid – Solenoids | |
3.0L SHO – Low Speed Fuel Pump Relay circuit – Power / Fuel Pump Circuits | |
84 | EGR Vacuum Regulator – Solenoids |
EGR cutoff solenoid – Solenoids | |
EGR Vent solenoid – Solenoids | |
85 | 2.3L T/C Automatic – 3/4-4/3 Shift solenoid – Transmissions |
CANP solenoid (ALL 1989) – Solenoids | |
(M) 1.9L MFI – System has corrected rich condition – Fuel control | |
86 | 2.3L or 2.9L Truck – A4LD 3/4 shift solenoid – Transmissions |
(M) 1.9L MFI – System has corrected lean condition – Fuel control | |
87 | (O) Fuel pump circuit fault (check inertia switch) – Power / Fuel Pump Circuits |
Vehicles with 2BBL carb – Temperature Compensated Accelerator Pump Solenoid – Solenoids | |
(M) intermittent in fuel pump primary circuit – Power / Fuel Pump Circuits | |
NOTE: On some Escorts with automatic seat belts this code is normal IN MEMORY due to the wiring | |
88 | Throttle Kicker Solenoid – Solenoids |
Variable Voltage Choke relay circuit fault – VVC | |
Fan Control circuit fault – A/C and Fan Circuits | |
A4LD – Converter Clutch Override solenoid – Transmissions | |
Electronic Ignition – IDM, DPI or spout circuit fault – Ignition Systems | |
89 | A4LD – Converter Clutch Override solenoid – Transmissions |
AXOD Torque Converter Control solenoid circuit – Transmissions | |
Exhaust Heat Control (heat riser) solenoid circuit – Solenoids | |
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
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91 | (R, M) System running lean – Fuel control |
Transmission SS 1 circuit/solenoid problem – Transmissions | |
92 | (R) System running rich – Fuel control |
Transmission SS 2 circuit/solenoid problem – Transmissions | |
93 | (O) Throttle linkage binding or bad ISC motor ISC (R) HO2S not reading – Fuel control |
Transmission TCC circuit/solenoid problem – Transmissions | |
94 | AIR system inoperative – Air Injection |
Transmission TCC circuit/solenoid problem – Transmissions | |
95 | (O) Fuel pump: open, bad ground or always on – Power / Fuel Pump Circuits |
(R) AIR not Diverting (AIRD) – Air Injection | |
(M) Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) – Power / Fuel Pump Circuits | |
96 | (O) Fuel pump monitor circuit shows no power – Power / Fuel Pump Circuits |
(R) AIR Bypass (AIRB) not working – Air Injection | |
(M) (Service 87 code first if present) Fuel pump relay or battery power feed was open – Power / Fuel Pump Circuits | |
97 | E4OD OD cancel light circuit failure – Transmissions |
98 | (R) Did not pass KOEO yet (Get 11 in KOEO first) |
Transmission EPC circuit/solenoid failure – Transmissions | |
99 | (R) ISC needs to learn (Let idle for 2 minutes; Erase memory and retest) |
Transmission EPC circuit/solenoid failure – Transmissions | |
Definitions |
|
ACT | Air Charge Temperature Sensor / BP See MAP / |
EEC | Electronic Engine Control System |
ECT | Engine Coolant Temperature Sensor |
EGR | Exhaust Gas Recirculation Valve |
EVP | Valve Position Sensor |
EGR / HEGO | Heated Exhaust Gas Oxygen Sensor |
KOEO | Key On Engine Off |
KOER | Key On Engine Running |
MAF | Mass Air Flow Sensor |
MAP | Manifold Absolute Pressure Sensor |
MLP | Manual Lever Position |
PCM | Powertrain Control Module |
SPOUT | Distributor Jumper to Allow Initial Timing |
TP | Throttle Position Sensor |