Diagnostic Trouble Codes - 1993
Ford
| 11 | System PASS. |
| 12 | Cannot control rpm during KOER Sell-Test high rpm check. |
| 13 | Cannot control rpm during KOER Self-Test low rpm check. |
| 14 | PIP Circuit failure. |
| 15 | PCM Read Only Memory (ROM) teat failed. |
| 16 | Rpm too low to perform H02S test. |
| 18 | SPOUT circuit open. |
| 18 | IDM circuit failure/ SPOUT circuit grounded. |
| 19 | Failure In PCM Internal voltage. |
| 21 | ECT out of Self-Test range MAP/BARO out of Self-Test range. |
| 22 | MAP/BARO out of Self-Test range. |
| 23 | TP out of Self-Test range. |
| 24 | IAT out of Self-Test range. |
| 26 | MAF out of Self-Test range. |
| 29 | Insufficient input from the Vehicle Speed Sensor (VSS). |
| 31 | EVP circuit below minimum voltage. |
| 32 | EVP voltage below closed limit. |
| 33 | EGR valve opening not detected. |
| 34 | EVP voltage above closed limit. |
| 35 | EVP circuit above maximum voltage. |
| 41 | HO2S circuit indicates system lean (right HO2S). |
| 41 | No HO2S switch detected (right HO2S). |
| 42 | HO2S circuit indicates system rich (right HO2S). |
| 44 | Secondary Air Injection system Inoperative (right side). |
| 45 | Secondary Air Injection upstream during Self-Test. |
| 46 | Secondary Air Injection not bypassed during Self-Test. |
| 51 | ECT Indicated -40 C (-40 F) /circuit open. |
| 53 | TP circuit above maximum voltage. |
| 54 | IAT Indicated -4000 (-40"F) /circuit open. |
| 56 | MAF circuit above maximum voltage. |
| 61 | ECT Indicated 123 C (254 F) / circuit grounded. |
| 63 | TP circuit below minimum voltage. |
| 64 | IAT indicated 123 C (254 F) I circuit grounded. |
| 66 | MAF circuit below minimum voltage. |
| 67 | Park/Neutral Position (PNP) switch circuit open - A/C on during Self-Test. |
| 77 | Brief WOT not sensed during Self-Test / Operator error. |
| 79 | A/C on/Defrost on during Self-Test. |
| 81 | Secondary -Air Injection Diverter (AIRD) solenoid circuit failure. |
| 82 | Secondary Air Injection Bypass (AIRS) solenoid circuit failure. |
| 84 | EGR Vacuum Regulator (EVR) circuit failure. |
| 85 | Canister Purge (CANP) circuit failure. |
| 87 | Fuel pump primary circuit failure. |
| 91 | HO2S circuit Indicates system loan (left HO2S). |
| 91 | No HO2S switch detected (left HO2S). |
| 92 | HO2S circuit indicates system rich (left HO2S). |
| 94 | Secondary Air Injection system Inoperative (left side). |
| 95 | Fuel pump secondary circuit failure. |
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
