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EEV-IV Codes

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    EEV-IV Codes

    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.).

    (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) - 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

    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 4x4 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

    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

    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

    #2
    Nice! Good Info...
    1983 Grand Marquis 2Dr Sedan "Mercules"
    Tremec TKO conversion, hydraulic clutch, HURST equipped!

    Comment


      #3
      no. NO! He has read my mind!

      I am working on a complete code list. It is huge.
      Pebbles-1968 Ford F250
      Pile of Junk! An Electronics Project Site (To get wet by)<---Clicky! NEW STUFF!!!!

      Comment


        #4
        Didn't mean for it to sound like that. I am working on a list of codes that my book didn't even have in it. I will post it when I am done.
        Pebbles-1968 Ford F250
        Pile of Junk! An Electronics Project Site (To get wet by)<---Clicky! NEW STUFF!!!!

        Comment


          #5
          looks good, I will sticky this for reference.

          Also keep in mind, I have several different reference manauls on testing and Diagnosing EEC-IV, so PM or e-mail if you have some specific info you need.
          2003 Town Car Signature - 3.27 RAR, Dual exhaust and J-mod - SOLD 9/2011
          89 Crown Victoria LX HPP -- SOLD 9/2010
          88 Grand Marquis LS - The Original -- Totaled 5/2006


          I rebuild AOD/AODE/4R70W/4R75E transmissions....Check out my Facebook page: https://www.facebook.com/pages/North...48414635312478

          Comment

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