Diagnostic Trouble Codes - 1992
Ford
| 111 | System "pass" |
| 112 | ACT sensor circuit grounded. |
| 113 | ACT sensor circuit open. |
| 114 | ACT sensor is out of Self-Test. |
| 116 | ECT sensor is out of Self-Test. |
| 117 | ECT sensor circuit grounded. |
| 118 | ECT sensor circuit open. |
| 121 | TP sensor is out of Self-Test. |
| 122 | TP sensor input is less than Self-Test minimum. |
| 123 | TP sensor input is greater than Self-Test maximum. |
| 124 | TP sensor input voltage is greater than expected. |
| 125 | TP sensor input voltage is less than expected. |
| 129 | Insufficient MAF input. |
| 136 | HEGO sensor circuit indicates system lean (Right HEGO). |
| 137 | HEGO sensor circuit indicates system rich (Right HEGO). |
| 139 | No HEGO switching (Front Side). |
| 144 | No HEGO switching (Left Side). |
| 157 | MAF sensor circuit open. |
| 158 | MAF sensor shorted to power. |
| 159 | MAF sensor is out of Self-Test. |
| 167 | Insufficient TP input change. |
| 171 | Lack of HEGO switching (Rear Side). |
| 172 | HEGO sensor circuit indicates lean. (Rear Side). |
| 173 | HEGO sensor circuit indicates rich. (Rear Side). |
| 175 | Lack of HEGO switching (Front Side). |
| 176 | HEGO sensor circuit indicates lean. (Front Side). |
| 177 | HEGO sensor circuit indicates rich. (Front Side). |
| 179 | Fuel system at part throttle lean adaptive limit, system rich (Rear Side). |
| 181 | Fuel system at part throttle rich adaptive limit, system lean (Rear Side). |
| 182 | Fuel system at idle lean adaptive limit, system rich (Rear Side). |
| 183 | Fuel system at idle rich adaptive limit, system lean (Rear Side). |
| 184 | MAF sensor input voltage is greater than expected, in range. |
| 185 | MAF sensor input voltage is less than expected, in range. |
| 186 | Closed loop injector pulse width longer than expected. |
| 187 | Closed loop injector pulse width shorter than expected. |
| 188 | Fuel system at part throttle lean adaptive limit, system rich (Front Side). |
| 189 | Fuel system at part throttle rich adaptive limit, system lean (Front Side). |
| 191 | Fuel system at idle lean adaptive limit, system rich (Front Side). |
| 192 | Fuel system at idle rich adaptive limit, system lean (Front Side). |
| 211 | PIP circuit failure. |
| 212 | Loss of tachometer/IDM input. |
| 213 | EEC SPOUT circuit open. |
| 214 | CID circuit failure. |
| 326 | PFE sensor circuit voltage lower than expected. |
| 327 | PFE sensor circuit voltage below Self-Test minimum. |
| 332 | Insufficient EGR flow. |
| 335 | PFE sensor circuit voltage out of Self-Test range. |
| 336 | PFE sensor circuit voltage higher than expected. |
| 337 | PFE sensor circuit voltage above Self-Test maximum. |
| 411 | Cannot control RPM during KOER low RPM check. |
| 412 | Cannot control RPM during KOER high RPM check. |
| 452 | Insufficient input from VSS. |
| 511 | ROM test failure. |
| 512 | KAM test failure. |
| 513 | EEC internal voltage failure. |
| 519 | PSPS circuit open. |
| 521 | PSPS circuit did not change. |
| 522 | Vehicle not in PARK or NEUTRAL during KOEO. |
| 536 | Brake On/Off circuit failure/not activated during KOER. |
| 538 | Insufficient RPM change during KOER Dynamic Response Test. |
| 542 | Fuel pump circuit open, EEC processor to motor ground. |
| 543 | Fuel pump circuit open, battery to EEC processor. |
| 556 | Fuel pump circuit failure. |
| 558 | Electronic Vacuum regulator circuit failure. |
| 563 | High speed Electro Drive Fan circuit failure. |
| 564 | Electro Drive Fan circuit failure. |
| 565 | Canister purge (CANP) circuit failure. |
| 621 | Shift solenoid #1 circuit failure. |
| 622 | Shift solenoid #2 circuit failure. |
| 624 | EPC solenoid or driver failure. |
| 625 | EPC solenoid driver open in EEC processor. |
| 628 | Lock-up solenoid circuit failure, excessive clutch slippage. |
| 629 | Lock-up solenoid circuit failure. |
| 634 | MLP sensor voltage out of Self-Test range. |
| 636 | Transmission oil temperature sensor voltage out of Self-Test range. |
| 637 | Transmission oil temperature sensor voltage above Self-Test maximum. |
| 638 | Transmission oil temperature sensor voltage below Self-Test minimum. |
| 639 | Insufficient input from turbine speed sensor. |
| 641 | Shift solenoid #3 circuit failure. |
| 645 | Incorrect gear ratio obtained for first gear. |
| 646 | Incorrect gear ratio obtained for second gear. |
| 647 | Incorrect gear ratio obtained for third gear. |
| 648 | Incorrect gear ratio obtained for fourth gear. |
| 649 | EPC range failure. |
| 651 | EPC circuit failure. |
| 998 | Hard faults present. |
To extract DTCs from the computer for diagnostic purposes, the Self Test connector is used.
- Start engine and bring to normal operating temperature. If engine will not start or stalls after starting, proceed with next step.
- Turn the key "OFF", then wait ten seconds.
- Activate the self test by grounding the Self-Test Input (STI) connector.
- Turn the ignition key "ON".
- Record all codes received.
- Turn ignition "OFF".
Data Link Connector (DLC)
(Located Underhood)
Analog Voltmeter Connection
© 2003 Vincent T. Ciulla
