Service Code Definitions
SERVICE CODE DEFINITIONS
| Service Code | Test Condition(s) | Definition | |
|---|---|---|---|
| 11 | KOEO/KOER/ CONTINUOUS | System Pass | |
| 12 | KOER | Unable to control RPM during Self-Test high RPM check | |
| 13 | KOER | Unable to control RPM during Self-Test low RPM check | |
| 14 | |||
| 7.3L Diesel | CONTINUOUS | Engine RPM Sensor circuit failure | |
| All Others | CONTINUOUS | PIP circuit failure | |
| 15 | KOEO | ECA Read Only Memory (ROM) Test Failed | |
| 15 | CONTINUOUS | ECA Keep Alive Memory (KAM) Test Failed | |
| 16 | KOEO | IDM signal not received | |
| 18 | |||
| 2.3L | KOER | SPOUT circuit open | |
| 2.3L | CONTINUOUS | Erratic IDM input to processor | |
| 4.0L | KOER | SAW circuit failure | |
| 4.0L | CONTINUOUS | Loss of IDM input to processor/IDM circuit failure | |
| All Others | KOER | SPOUT circuit open | |
| All Others | CONTINUOUS | Loss of IDM input to processor/SPOUT circuit grounded | |
| 19 | KOEO | Failure in ECA internal voltage | |
| 21 | KOER/KOEO | ECT sensor out of Self-Test Range | |
| 22 | KOEO/KOER/ CONTINUOUS | MAP/BP sensor input is out of Self-Test Range | |
| 23 | |||
| 7.3L Diesel | KOEO/KOER | Fuel Injection Pump Lever (FIPL) circuit is out of Self-Test Range | |
| All Others | KOEO/KOER | TP sensor input is out of Self-Test Range | |
| 24 | KOER/KOEO | ACT sensor input is out of Self-Test Range | |
| 25 | KOER | Knock not sensed during Dynamic Response Test | |
| 26 | |||
| 2.9L/4.0L | KOEO/KOER | MAF sensor is out of Self-Test range | |
| All Others | KOEO/KOER | Transmission Oil Temperature (TOT) Sensor out of Self-Test range | |
| 28 | CONTINUOUS | Loss of IDM - Right Side | |
| 29 | CONTINUOUS | Insufficient input from VSS | |
| 31 | KOEO/KOER/ CONTINUOUS | EVP circuit below minimum voltage | |
| 32 | KOEO/KOER/ CONTINUOUS | EVP voltage below closed limit | |
| 33 | KOER/CONTINUOUS | EGR valve opening not detected | |
| 34 | KOEO/KOER/ CONTINUOUS | EVP voltage above closed limit | |
| 35 | KOEO/KOER/ CONTINUOUS | EVP circuit above maximum voltage | |
| 39 | CONTINUOUS | AXOD lock-up failed | |
| 41 | KOER | HEGO sensor circuit indicates lean | |
| 41 | CONTINUOUS | No HEGO switching detected | |
| 42 | KOER/CONTINUOUS | HEGO sensor circuit indicates rich | |
| 44 | KOER | Thermactor air system inoperative | |
| 45 | |||
| 4.0L | CONTINUOUS | Coil 1, 2 or 3 failure | |
| All Others | CONTINUOUS | Thermactor air upstream during Self-Test | |
| 46 | KOER | Thermactor air not bypassed during Self-Test | |
| 47 | KOEO | 4X4 switch is closed (E4OD) | |
| 48 | CONTINUOUS | Loss of IDM - Left Side | |
| 49 | CONTINUOUS | 1-2 shift error (E4OD) | |
| 51 | KOEO/CONTINUOUS | ECT indicated -40°F/sensor circuit open | |
| 52 | KOEO | PSPS circuit is always open | |
| 52 | KOER | PSPS circuit did not change states | |
| 53 | |||
| 7.3L Diesel | KOEO/CONTINUOUS | Fuel Inj. Pump Lever (FIPL) circuit is greater than maximum voltage | |
| All Others | KOEO/CONTINUOUS | TP sensor input is greater than maximum voltage | |
| 54 | KOEO/CONTINUOUS | ACT sensor -40°F circuit open | |
| 56 | |||
| 2.9L/4.0L | KOEO/CONTINUOUS | MAF circuit above maximum voltage | |
| All Others | KOEO/CONTINUOUS | Transmission Oil Temperature (TOT) indicated -40°F circuit open (E4OD) | |
| 57 | CONTINUOUS | AXOD Neutral Pressure Switch (NPS) circuit failed open | |
| 59 | CONTINUOUS | 2-3 shift error (E4OD) | |
| 61 | KOEO/CONTINUOUS | ECT indicated 254°F circuit grounded | |
| 62 | CONTINUOUS | Converter Clutch error (E4OD) | |
| 63 | |||
| 7.3L Diesel | KOEO/CONTINUOUS | Fuel Inj. Pump Lever (FIPL) circuit is below minimum voltage | |
| All Others | KOEO/CONTINUOUS | TP sensor input is less than minimum voltage | |
| 64 | KOEO/CONTINUOUS | ACT indicated 254°F circuit grounded | |
| 65 | KOER | Overdrive Cancel Switch (OCS) not changing state (E4OD) | |
| 66 | |||
| 2.9L/4.0L | KOEO/CONTINUOUS | MAF circuit below minimum voltage | |
| All Others | KOEO/CONTINUOUS | Transmission Oil Temperature (TOT) indicated 290°F circuit grounded (E4OD) | |
| 67 | |||
| All Models | KOEO | Neutral Drive Switch (NDS) circuit open; A/C on | |
| All Others | CONTINUOUS | Manual Lever Position (MLP) is out of range; A/C on (E4OD) | |
| 2.9/4.0L | CONTINUOUS | Clutch switch circuit failure | |
| 69 | CONTINUOUS | 3-4 shift error (E4OD) | |
| 72 | KOER | Insufficient MAF or MAP change during Dynamic Response Test | |
| 73 | KOER | Insufficient throttle position (TP) change during Dynamic Response Test | |
| 74 | KOER | Brake ON/OFF (BOO) switch circuit failure (not activated during Self-Test) | |
| 77 | KOER | Operator error during Dynamic Response/Cylinder Balance tests | |
| 79 | KOEO | A/C On/Defrost on during Self-Test | |
| 81 | KOEO | Air Management 2 (AM2) circuit failure | |
| 82 | KOEO | Air Management 1 (AM1) Ckt failure | |
| 84 | KOEO | EGR Vacuum Regulator (EVR) circuit failure | |
| 85 | KOEO | Canister Purge (CANP) circuit failure | |
| 86 | KOEO | Shift Solenoid (SS) circuit failure | |
| 87 | KOEO/CONTINUOUS | Primary Fuel Pump circuit failure | |
| 88 | KOEO | Loss of Dual Plug input control | |
| 89 | KOEO | Converter Clutch Override (CCO) circuit failure | |
| 91 | KOEO | Shift Solenoid 1 (SS1) circuit failure (E4OD) | |
| 92 | KOEO | Shift Solenoid 2 (SS2) circuit failure (E4OD) | |
| 93 | KOEO | Coast Clutch Solenoid (CCS) circuit failure (E4OD) | |
| 94 | KOEO | Converter Clutch Control (CCC) solenoid circuit failure (E4OD) | |
| 95 | KOEO/CONTINUOUS | Fuel pump circuit open; ECA to motor ground | |
| 96 | KOEO/CONTINUOUS | Fuel pump circuit open; Battery to ECA | |
| 97 | KOEO | Overdrive Cancel Light (OCIL) | |
| 98 | KOEO | Electronic Pressure Control (EPC) driver open in ECA (E4OD) | |
| 98 | KOER | Hard fault is present | |
| 99 | KOEO/CONTINUOUS | Electronic Pressure Control (EPC) circuit failure (E4OD) | |
| NO CODES | Unable to initiate Self-Test or unable to output Self-Test codes | ||
| CODES NOT LISTED | Service codes displayed are not applicable to vehicle being tested | ||