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Ford Diagnostic Codes, Trouble Codes and Descriptions

WesTech Auto

Diagnostic Codes

Ford

Electronic Engine Control IV (EEC-IV)
Key On, Engine Off Codes
11 System Pass.
13 Idle Speed Control Motor did not move.
15 Readout Memory Test failed.
16 Ignition Diagnostic Module (2.9L, 3.0L & 4.0L).
19 Power Processor Check (2.3L HSC EFI).
21 Engine Coolant Temperature (ECT) Sensor out of self test Range.
22 Manifold Absolute Pressure (MAP) Sensor circuit failure or out of range..
23 Throttle Position Sensor out of range..
23 Fuel Injector Pump Lever Sensor Input is out of self test Range (Diesel).
24 Intake Air Temperature/Air Charge Temperature Sensor is out of self test Range.
26 Mass Air Flow/Vane Air Flow Sensor out of self test Range.
26 Transmission Fluid Temperature Sensor Input out of self test Range (5.0L, 5.8L, 7.3L & 7.5L Truck).
28 Vane Air Temperature Sensor Input out of self test Range (1.9L EFI).
31 EGR Valve Position/Pressure Feedback EGR circuit below minimum voltage.
32 EGR Valve Position/Pressure Feedback EGR voltage below closed voltage (other vehicles).
34 Defective EGR Pressure Transducer Sensor (1.9L CFI, 2.3L HSC EFI & 3.0L).
34 EGR Valve Position/Pressure Feedback EGR voltage above closed Limit (other vehicles).
35 EGR Valve Position/EGR Pressure Feedback. EGR circuit above maximum voltage.
47 4x4 Switch is closed.
51 Engine Coolant Temperature circuit open.
52 Power Steering Pressure Switch circuit open.
53 Throttle Position Sensor circuit above maximum voltage.
53 Fuel Injector Pump Lever Sensor Input is Greater than self test (Diesel).
54 Intake Air Temperature/Air Charge Temperature circuit open.
56 Transmission Fluid Temperature circuit open.
56 Mass Air Flow/Vane Air Flow Sensor circuit above maximum voltage.
58 Idle Tracking Switch circuit open or grounded (CFI).
58 Vane Air Temperature Sensor Input Greater than self test maximum (EFI).
59 Low Speed Fuel Pump circuit failure, Battery to PCM (3.0L SHO).
59 AXOD 4/3 Pressure Switch circuit failed closed.
61 Engine Coolant Temperature Sensor circuit grounded.
62 AXOD 4/3 or 3/2 Pressure Switch circuit grounded.
63 Throttle Position Sensor circuit below minimum voltage.
63 Fuel Injection Pump Lever Sensor Input is less than self test minimum (Diesel).
64 Intake Air Temperature/Air Charge Temperature circuit grounded.
66 Vane Air Flow Sensor Input less than self test minimum (1.9L MFI & 2.3L Turbo).
66 Transmission Fluid Temperature circuit grounded (other vehicles).
67 Park Neutral Position Switch circuit open - A/C on.
67 Manual Lever Position Sensor out of Range - A/C on.
67 A/C Input High (2.5L TBI).
68 Idle Tracking Switch closed (1.9L, 2.3L, 2.5L & 3.8L CFI).
68 Vane Air Temperature Sensor Input less than self test minimum (1.9L MFI & 2.3L Turbo).
69 AXOD 3/2 Pressure Switch failed closed (3.8L SFI).
73 Insufficient Throttle Position change during Dynamic Response Test.
79 A/C on/Defrost on during self test.
81 Secondary Air Diverter circuit failure.
81 Turbo Boost (2.3L Turbo).
81 Insufficient IAS Output voltage change When Solenoid is Activated (3.0L SHO).
82 Secondary Air Bypass circuit failure.
82 Integrated Relay Control Module (2.3L Turbo).
82 Supercharger Bypass circuit failure (3.8L SC).
83 Integrated Relay Control Module (2.3L Turbo & 2.5L).
83 High Electric Drive Fan circuit failure (1.9L & 2.5L SFI).
83 EVP/EGRC/EGRV (2.3L OHC & 3.8L CFI).
83 Low Speed Fuel Pump Relay circuit open (3.0L SHO).
83 Integrated Relay Control Module (3.8L Turbo).
83 High Electric Drive Fan circuit failure (3.8L SFI & 3.8L SC).
84 EGR Valve Position/Pressure Feedback EGR/EGR Control circuit failure.
85 Shift Solenoid 3/4-4/3 (2.3L Turbo).
85 CANP circuit failure (other vehicles).
86 Shift Solenoid circuit failure (2.9L 3.0L & 4.0L).
87 Primary Fuel Pump circuit failure.
87 Integrated Relay Control Module (2.3L Turbo, 2.5L & 3.8L MFI).
88 Shift Solenoid 3/4-4/3 (2.3 Turbo).
88 Integrated Relay Control Module (2.5 L HSC & 3.8L EFI).
88 Electric Drive Fan circuit failure (2.5L, 3.0L SHO & 3.8L SFI).
89 Converter Clutch Override circuit failure (2.9L, 3.0L & 4.0L).
89 Exhaust Heat Control (3.8L CFI).
91 Shift Solenoid 1 circuit failure.
92 Shift Solenoid 2 circuit failure.
93 Throttle Position Sensor Input Low at maximum D.C. Motor Extension (1.9L, 2.3L & 2.5L TBI).
93 Converter Clutch Solenoid circuit failure (other vehicles).
94 Torque Converter Clutch Solenoid circuit failure.
95 Integrated Relay Control Module (2.5L HSC & 3.8L EFI).
95 Fuel Pump circuit open-PCM to Motor Ground (other vehicles).
96 Integrated Relay Control Module (2.5L HSC & 3.8L EFI).
96 High Speed Fuel Pump Relay circuit open (3.0L SHO).
96 Fuel Pump circuit open - Battery to PCM (other vehicles).
97 Transmission Control Indicator Lamp circuit failure.
98 Electronic Pressure Control Driver open In PCM (Diesel).
99 Electronic Pressure Control circuit failure.
111 System Pass.
112 Intake Air Temperature/Air Charge Temperature Sensor circuit below minimum voltage.
113 Intake Air Temperature/Air Charge Temperature Sensor circuit above maximum voltage.
114 Intake Air Temperature/Air Charge Temperature Higher or Lower than Expected.
116 Engine Coolant Temperature Higher or Lower than Expected.
117 Engine Coolant Temperature Sensor circuit below minimum voltage.
118 Engine Coolant Temperature Sensor circuit above maximum voltage.
121 Closed Throttle voltage Higher or Lower than Expected.
121 Indicates Throttle Position voltage Inconsistent with Mass Air Flow Sensor.
122 Throttle Position Sensor circuit below minimum voltage.
123 Throttle Position Sensor circuit above maximum voltage.
126 Manifold Absolute Pressure/Barometric Pressure Sensor Higher or Lower than Expected.
158 Mass Air Flow Sensor circuit above maximum voltage.
159 Mass Air Flow Higher or Lower than Expected.
193 Flexible Fuel Sensor circuit failure.
226 Ignition Diagnostic Module Signal not Received (EI).
327 EGR circuit below minimum voltage.
328 EGR Valve Position Sensor closed Valve voltage Lower than Expected.
334 EGR Valve Position Sensor closed Valve voltage Higher than Expected.
335 Pressure Feedback EGR Sensor voltage Higher or Lower than Expected.
337 EGR Valve Position/Pressure Feedback EGR circuit above maximum voltage.
341 Octane Adjust Service Pin open.
511 Read out Memory Test failure.
513 PCM Internal voltage failure.
519 Power Steering Pressure Switch circuit open.
522 Vehicle not In Park or Neutral.
524 Low Speed Fuel Pump circuit open.
525 Vehicle in Gear with A/C on.
526 Neutral Position Switch circuit closed, A/C on.
527 Neutral Drive Switch circuit open, A/C on.
539 A/C or Defrost on.
542 Fuel Pump circuit open-PCM to Motor Ground.
543 Fuel Pump circuit open-Battery to Powertrain Control Module (PCM).
551 Intake Air Control circuit failure.
552 AIR Bypass circuit failure.
553 AIR Bypass circuit failure.
554 Fuel Pump Relay Control circuit failure.
556 Fuel Pump Relay Primary circuit failure.
557 Low Speed Fuel Pump Primary circuit failure.
558 EGR Vacuum Regulator circuit failure.
559 A/C on Relay circuit failure.
563 High Speed Electric Fan circuit failure.
564 Electric Fan circuit failure.
565 Canister Purge circuit failure.
566 Shift Solenoid circuit failure.
569 Auxiliary Canister Purge circuit failure.
571 EGR circuit failure.
572 EGR circuit failure.
582 Fan circuit open.
587 Vehicle Control Relay Module Communication failure.
621 Shift Solenoid 1 circuit failure.
622 Shift Solenoid 2 circuit failure.
623 Transmission Control Indicator Lamp circuit failure.
624 Electronic Pressure Control circuit failure.
625 Hard Fault is Present (5.8L).
625 Electronic Pressure Control Driver open in PCM (other vehicles).
626 Converter Clutch Solenoid circuit failure.
627 Torque Converter Clutch Solenoid circuit failure.
631 Transmission Control Indicator Lamp circuit failure.
633 4x4 Switch closed.
634 Manual Lever Position Sensor voltage higher or lower than expected.
636 Transmission Fluid Temperature higher or lower than expected.
637 Transmission Fluid Temperature Sensor circuit above maximum voltage.
638 Transmission Fluid Temperature Sensor circuit below minimum voltage.
641 Shift Solenoid 3 circuit failure.
643 Torque Converter Clutch circuit failure.
654 Manual Lever Position Sensor Indicating not in Park during self test.
662 Shift Solenoid 2 circuit.
667 Transmission Range Sensor circuit below minimum voltage.
668 Transmission Range Sensor circuit above maximum voltage.
675 Transmission Range Sensor circuit voltage out of range.
998 Hard Fault Present.
The Diagnostic Codes and Explanations are derived from Manufacturer supplied Technical Data. WesTech does not guarantee the accuracy of this Information nor can it be held liable for providing it.
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