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Ford OBD Trouble Codes & Ford OBD I Diagnostic Codes

October 29, 2019 by 3635OBD2  

This article is available with Ford OBD-II Trouble Codes Ford OBD I Diagnostic Codes.

 

Ford OBD-II Trouble Codes:
https://www.obd-codes.com/trouble_codes/ford/

Ford OBD I Diagnostic Codes:

Full list of OBD I Diagnostic Trouble Codes for your Ford Vehicle. If your Check engine light is on you may have a serious problem. Scan your codes and follow the chart to determine what the code means. Some shops will scan your codes for free. Ford VCM2 IDS is the professional Ford Mazda diagnostic tool that will show you the trouble codes. Or do it yourself with the procedure posted below.

 

To read out the DTCs from the computer for diagnostic purposes, the Self Test connector is used.

  1. Start engine and bring to normal operating temperature. If engine will not start or stalls after starting, proceed with next step.
  2. Turn the key “OFF”, then wait ten seconds.
  3. Activate the self test by grounding the Self-Test Input (STI) connector.
  4. Turn the ignition key “ON”.
  5. Record all codes received.
  6. Turn ignition “OFF”.

ford-data-conector-01

IMG 1: Data Link Connector (DLC)(Located Under hood)

 

 ford-check-engine-light-self-test-02

IMG 2: Analog Voltmeter Connection

 

Ford Codes

 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.

 

3 Digit Ford Codes

111   System checks OK
112 (O,M) Intake Air Temperature (IAT) sensor is/was low or grounded – IAT
113 (O,M) IAT sensor is/was high or open – IAT
114 (O,R) IAT sensor out of range – IAT
116 (O,R) Engine Coolant (ECT) sensor out of range – ECT
117 (O,M) ECT sensor is/was low or grounded – ECT
118 (O,M) ECT sensor is/was high or open – ECT
121 (O,R,M) Throttle Position (TP) sensor out of range – TPS
122