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  1. #1
    Administrator SVOeric's Avatar
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    SVO's: 86-1C & 86-1E

    How to pull codes and code list

    Pulling codes without a code reader is pretty simple.
    This FAQ will go through the process of pulling codes, and how this needs to be done.

    Here is how to hook up the code reader

    There are 2 types of codes.
    KOEO -- Key on, engine off
    KOER -- Key on engine running

    Reading the codes --


    The first thing to do before reading codes on your computer is WARM UP. The engine must be warm, even for an accurate KOEO test.
    Ford suggests 2 minutes at 2000 RPM, Mike Flemming suggests a 10 minute drive (with extensive use of the accelerator pedal) to be sure everything is up to to temp.

    The codes will be displayed on your fancy tester, volt meter, or test light. Reading the codes from the fancy tester is self explanatory, but here is how you read from a test light, or volt meter.

    The codes will be displayed as flashes on the light, or needle sweeps on the volt meter. On SVO's all codes will be 2 digit.
    Codes are displayed as pulses, with .5 seconds between digits, and 2 seconds between codes. so code 22 would be displayed as :
    pulse (.5 seconds) pulse (2 seconds) pulse (.5 seconds) pulse
    there would then be a 4 second pause between codes, if more than one is present

    In KOEO mode, after current codes are displayed, a pause of 6-9 seconds will occur, and any stored codes will be displayed

    What's expected from YOU!

    After the engine is warm, and you begin your self test, there will be a series of outputs from the computer. Some of these outputs will be signals that the computer wants something. This section will explain what's required of you.
    KOEO tests don't have any expected inputs, so these all refer to KOER tests.

    Here are the outputs you will be seeing after you start the engine:
    • You will see 2 pulses, this is a engine ID code, no input is expected.
    • 6-20 seconds later, you will see a single pulse, this is the goose test indicator, you should do the goose test now.
    KOEO test codes
    (pulls 'current' codes, and codes stored in memory)


    (1) Make sure engine is fully warmed. (read above for suggestions)
    (2) Turn the engine OFF
    (3) Connect the scan tool (whatever it may be) to the self-test connectors.
    (4) Turn the ignition switch ON but don't start the engine.
    (5) The codes will be transmitted. Six to nine seconds after the last code, a single separator pulse will be transmitted. Six to nine seconds after this pulse, the codes from the Continuous Memory will be transmitted.
    (7) Record all service codes displayed.



    KOER codes.


    (1) Make sure engine is fully warmed. (read above for suggestions)
    (2) Turn ignition off. Make sure A/C is off and transmission is in Neutral.



    (3) Hook up light and jumper (or tester if you have one).
    (4) Set emergency brake, and and start engine.

    (5) Engine I.D. should be output.

    (6) When goose pulse is received, press accelerator pedal to the floor, wait for the tac to hit 3500 RPM, and release. -- If you want to be sure you don't get a code 25, have a buddy tap the intake a couple times GENTLY with something metal.

    (7) Fast Codes are output (ignore, these would be read by a star type reader).

    (8) Read codes, as above.













    a list of codes follows :
    Eric C
    SVOCA Webmaster

  2. #2
    Administrator SVOeric's Avatar
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    SVO's: 86-1C & 86-1E
    (O) = Key On Engine Off test
    (R) = Key On Engine Running test
    (M) = Memory code



    Code 11 System checks OK -

    Code 12 Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low)

    Code 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

    Code 14 Ignition pickup was erratic
    E4OD Transmission diesel RPM sensor

    Code 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 ?)

    Code 16 1.9L & 2.5L - Throttle stop set too high
    2.3L - RPM's too low
    (O) Electronic ignition - IDM circuit fault

    Code 17 1.9L & 2.5L - Throttle stop set too low

    Code 18 (R) Check base timing & advance function
    (M) Ignition TACH signal erratic

    Code 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

    Code 21 Engine Coolant Temperature (ECT) sensor out of range

    Code 22 MAP (vacuum) or BARO signal out of range

    Code 23 Throttle sensor out of range or throttle set too high

    Code 24 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range

    Code 25 Knock sensor not tested (ignore if not pinging)

    Code 26 Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range
    Transmission Oil Temperature (TOT) sensor out of range

    Code 27 Vehicle Speed Sensor problem

    Code 28 Vane Air Temperature (VAT) sensor out of range
    2.3L w/Electronic Ignition - Cyl ID, IDM low or right coil pack failure

    Code 29 Vehicle Speed Sensor problem

    Code 31 EVP - (O, R, M) EVP signal is/was out of range

    Code 32 EVP - (R) EGR not responding properly during test

    Code 33 ALL - (O, M) EGR did not open/ respond during test or if memory code, did not open intermittently

    Code 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

    Code 35 EVP - (R) Engine RPM's too low to test EGR system

    Code 38 Idle Tracking Switch signal was intermittent

    Code 39 Transmission Torque Converter clutch not engaging

    Code 41 System lean

    Code 42 System rich

    Code 43 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

    Code 44 AIR system inoperative

    Code 45 AIR not Diverting (AIRD)
    Electronic Ignition - coil primary circuit failure

    Code 46 AIR Bypass (AIRB) not working
    Electronic Ignition - primary circuit failure coil 2

    Code 47 Low flow unmetered air (check for small vacuum leaks, injector o'rings, gaskets etc.)
    E4OD transmission 4x4 switch/circuit problem

    Code 48 High flow unmetered air (check for large vacuum leak, inlet hoses etc.)
    Electronic Ignition - coil primary circuit failure

    Code 49 Electronic Ignition - spout signal circuit problem
    Transmission 1/2 shift problem

    Code 51 Engine Coolant Temperature (ECT) sensor signal is/was too high

    Code 52 Power Steering Pressure Switch/circuit open
    (R) Did you turn wheel during test ?

    Code 53 Throttle Position sensor too high

    Code 54 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high

    Code 55 No or low (under 7.5 V) Key Power to PCM pin 5

    Code 56 Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high
    Transmission Oil Temperature sensor too high

    Code 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)

    Code 58 Idle Tracking Switch (ITS) signal problem
    Vane Air Temperature (VAT) sensor out of range or open

    Code 59 AXOD 4/3 circuit fault

    Code 61 Engine Coolant Temperature (ECT) sensor is or was too low

    Code 62 AXOD (KOEO only) 3/2 circuit short to ground
    AXOD (KOEO AND KOER) 4/3 circuit failure
    E4OD excessive converter clutch slippage

    Code 63 Throttle Position Sensor (TPS) signal too low

    Code 64 Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded

    Code 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)

    Code 66 Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low
    Transmission Oil Temperature (TOT) signal low (possibly grounded)

    Code 67 Park/Neutral circuit fault
    Transmission Manual Lever Position (MLP) sensor circuit
    (M) Intermittent Park Neutral Position (PNP) sensor fault

    Code 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

    Code 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

    Code 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.

    Code 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

    Code 72 (R) No MAP or MAF change in "goose" test - retest, check for frequency or voltage change
    (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

    Code 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

    Code 74 Was brake depressed after engine ID was received ?
    Brake On Off (BOO) signal open or short to ground

    Code 75 Brake On Off (BOO) signal shorted to power

    Code 76 Vane Air Flow (VAF) did not respond to "goose" test

    Code 77 System did not receive "goose" test (SEE above directions)
    Code 78 (M) VPWR circuit to PCM was intermittent or the PCM is bad

    Code 79 A/C is on or pin 10 is shorted to power

    Code 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

    Code 81 Boost control solenoid
    AIRD solenoid
    3.0L SHO - Inlet Air Solenoid

    Code 82 2.3L TC - Fan Control wire shorted to ground
    AIRB solenoid
    3.8L SC - Super Charger Bypass Solenoid

    Code 83 High Electro Drive Fan circuit fault
    EGR Control solenoid
    3.0L SHO - Low Speed Fuel Pump Relay circuit

    Code 84 EGR Vacuum Regulator
    EGR cutoff solenoid
    EGR Vent solenoid

    Code 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

    Code 86 2.3L or 2.9L Truck - A4LD 3/4 shift solenoid
    (M) 1.9L MFI - System has corrected lean condition

    Code 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

    Code 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

    Code 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

    Code 91 (R, M) System running lean

    Code 92 (R) System running rich

    Code 93 (O) Throttle linkage binding or bad ISC motor (R) HO2S not reading

    Code 94 AIR system inoperative

    Code 95 (O) Fuel pump: open, bad ground or always on

    Code 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

    Code 97 E4OD OD cancel light circuit failure

    Code 98 (R) Did not pass KOEO yet (Get 11 in KOEO first)

    Code 99 (R) ISC needs to learn (Let idle for 2 minutes; Erase memory and retest)
    Eric C
    SVOCA Webmaster

  3. #3
    Boosted Raven855's Avatar
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    SVO's: 85 855 855 86 86 86
    Nice job Eric! Are the codes for the La3 computer the same?

  4. #4
    Administrator SVOeric's Avatar
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    SVO's: 86-1C & 86-1E
    yes, these codes are good for ANY ford computer that uses the 2 digit codes, however I have removed a lot of the info for auto trans cars, and other EGR systems.
    Eric C
    SVOCA Webmaster

  5. #5
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    EC, thanks for the keyboard aerobics!! That is a lot of time well spent.

    Just a note for the KOER test, BLOCK the wheels before you start the car. Most people know the condition of their parking brake system, but someone may assume that pulling on the handle just magically keeps the car from rolling.
    Not only that just 2 months ago, one of our members looked out his window to see his car in the neighbor's yard across the street, and he thought the brake was good to go..........just food for thought.

    Thanks again for the thread!

  6. #6
    14 PSI Boost Isaiah48's Avatar
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    Quote Originally Posted by NavySVO View Post
    EC, thanks for the keyboard aerobics!! That is a lot of time well spent.
    I agree, THANKS!!!
    Last edited by Isaiah48; 04-21-2009 at 01:40 PM.
    84 SVO

  7. #7
    Just a bit of BOOST
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    Where can I find this test port?

    Quote Originally Posted by SVOeric View Post
    Pulling codes without a code reader is pretty simple.
    This FAQ will go through the process of pulling codes, and how this needs to be done.

    Here is how to hook up the code reader













    a list of codes follows :

  8. #8
    Administrator SVOeric's Avatar
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    SVO's: 86-1C & 86-1E
    will be somewhere around the drivers side shock tower. if everything is in stock form, it will be under the coil cover, or right next to it
    Eric C
    SVOCA Webmaster

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