All Ford vehicles since 1996 feature OBD-II (On Board Diagnostics) capabilities. The vehicle's computer stores diagnostic codes that can be read with a code reader (such as those found on a hand-held performance tuner like the Diablo Predator or Superchips Microtuner. These codes can help you diagnose potential problems with your vehicle. Note that there are a few Ford models featuring the EEC-V processor before 1996 which supported OBD-II codes.

P0102	MAF Circuit Low Input
P0103	MAF Circuit High Input
P0106	BARO Sensor Circuit Performance
P0107	BARO Sensor Low Voltage Detected
P0108	BARO Sensor High Voltage Detected
P0109	BARO Sensor Circuit Intermittent
P0112	IAT Circuit Low Input
P0113	IAT Circuit High Input
P0117	ECT Circuit Low Input
P0118	ECT Circuit High Input
P0121	TP Sensor Circuit Performance Problem
P0122	TP Sensor Circuit Low Input
P0123	TP Sensor Circuit High Input
P0125	Insufficient Coolant Temperature To Enter Closed Loop
P0126	Insufficient Coolant Temperature For Stable Operation
P0	Air Intake Temperature To High
P0131	Upstream HO2S Circuit Out Of Range Low Voltage, Bank No. 1
P0132	Upstream HO2S Circuit Voltage High, Bank No. 1
P0133	Upstream HO2S Circuit Slow Response, Bank No. 1
P0135	Upstream HO2S Heater Circuit Fault, Bank No. 1
P0136	Downstream HO2S Circuit Fault, Bank No. 1
P0138	Downstream HO2S Circuit Voltage High, Bank No. 1
P0140	Downstream HO2S Circuit Faulty, Bank No. 1
P0141	Downstream HO2S Heater Circuit Fault, Bank No. 1
P0151	Upstream HO2S Circuit Out Of Range Low Voltage, Bank No. 2
P0152	Upstream HO2S Circuit Voltage High, Bank No. 2
P0153	Upstream HO2S Circuit Slow Response, Bank No. 2
P0155	Upstream HO2S Circuit Fault, Bank No. 2
P0156	Downstream HO2S Circuit Fault, Bank No. 2
P0158	Downstream HO2S Circuit Voltage High, Bank No. 2
P0160	Downstream HO2S Circuit Fault, Bank No. 2
P0161	Downstream HO2S Heater Circuit Fault, Bank No. 2
P0171	System Too Lean, Bank No. 1
P0172	System Too Rich, Bank No. 1
P0174	System Too Lean, Bank No. 2
P0175	System Too Rich, Bank No. 2
P0176	Flexible Fuel Sensor
P0180	Engine Fuel Temperature Sensor Circuit, Electrical Fault
P0181	Engine Fuel Temperature Sensor Circuit, Electrical Fault
P0182	Engine Fuel Temperature Sensor Circuit, Electrical Fault
P0183	Engine Fuel Temperature Sensor Circuit, Electrical Fault
P0186	Engine Fuel Temperature Sensor B Circuit
P0187	Engine Fuel Temperature Sensor Circuit
P0188	Engine Fuel Temperature Sensor Circuit
P0190	Fuel Rail Pressure Sensor Signal Low
P0191	Fuel Rail Pressure Sensor Circuit Performance
P0192	Fuel Rail Pressure Sensor Circuit Low Input
P0193	Fuel Rail Pressure Sensor Circuit High Input
P0201–P0212	Injector Circuits
P0217 P0218	Engine Coolant Overtemp Condition
P0222	Throttle Position Sensor B Circuit Input Low
P0223	Throttle Position Sensor B Circuit Input High
P0230	Fuel Pump Primary Circuit Fault
P0231	Fuel Pump Secondary Circuit Low
P0232	Fuel Pump Secondary Circuit High
P0234	Supercharger Overboost Condition
P0243	Supercharger Bypass Solenoid Malfunction
P0298	Engine Oil Over Temperature Condition
P0300	Random Misfire Detected
P0301–P0310	Misfire Detected Cylinders 1–10
P0320	Ignition Engine Speed Input Circuit Fault
P0325	A Spark Knock Occurred & Sensor Circuitry Did Not Respond
P0326	Spark Knock Has Not Been Sensed
P0330	A Spark Knock Occurred & Sensor Circuitry Did Not Respond
P0331	Spark Knock Has Not Been Sensed
P0340	CMP Sensor Circuit Fault
P0350	Ignition Coil Primary Circuit Fault
P0351-P0360	Ignition Coil (A through J) Primary/Secondary Circuit Fault
P0385	Misfire Detection Sensor Circuit Failure
P0400	EGR Flow Faulty
P0401	Insufficient EGR Flow
P0402	EGR Flow Excessive At Idle
P0411	Secondary Air Injection System Flow Improper
P0412	Secondary Air Injection System Control Valve Faulty
P0413	Secondary Air Injection Solenoid Did Not Change When Activated
P0414	Secondary Air Injection Solenoid Did Not Change When Activated
P0416	Secondary Air Injection Solenoid Did Not Change When Activated
P0417	Secondary Air Injection Solenoid Did Not Change When Activated
P0420	Catalyst System Efficiency Below Limit, Bank No. 1
P0421	Catalyst System Efficiency Below Limit, Bank No. 1
P0430	Catalyst System Efficiency Below Limit, Bank No. 2
P0431	Catalyst System Efficiency Below Limit, Bank No. 2
P0440	Evaporative Emission Purge Control Solenoid Damaged
P0442	Leak In Evaporative System Detected
P0443	EVAP Canister Purge Control Solenoid Or Valve Faulty
P0446	Evaporative Emission Control System Vent Control Malfunction
P0451	Fuel Tank Pressure Circuit Noisy
P0452	Fuel Tank Pressure Signal Circuit Input Below Minimum
P0453	Fuel Tank Pressure Signal Circuit Input Above Maximum
P0455	Leak Or Blockage Detected In Evaporative Emission Control System
P0456	Very Small Leak Detected in Evaporative Emission Control System
P0457	Fuel Filler Cap Loose Or Off
P0460	Fuel Level Sensor Input Circuit Malfunction
P0500	Vehicle Speed Sensor Fault
P0501	Vehicle Speed Sensor Range/Performance
P0503	VSS Intermittent
P0505	Idle Air Control Valve System Fault
P0552	Power Steering Pressure Sensor Shorted To Power
P0553	Power Steering Pressure Sensor Shorted To Power
P0602	Control Module Programming Error
P0603	PCM KAM Test Error
P0605	PCM Read Only Memory Error
P0703	Brake On/Off Switch Input Fault
P0704	Clutch Pedal Position Switch Input Circuit Fault
P0705	Transmission Range Sensor Out Of Self Test Range Or Shorted To Ground
P0707	Transmission Range Sensor Circuit Low Input
P0708	Transmission Range Sensor Circuit High Input
P0712	Transmission Fluid Temperature Sensor Circuit Input Low
P0713	Transmission Fluid Temperature Sensor Circuit Input High
P0715	turbine Shaft Speed Sensor Circuit Fault
P0717	Transmission Concern
P0720	Output Shaft Speed Sensor Circuit
P0721	Output Shaft Speed Sensor Circuit
P0722	No Signal From Output Shaft Speed Sensor
P0723	Output Shaft Speed Sensor Circuit Intermittent Failure
P0731	Improper Ratio For First Gear
P0732	Improper Ratio For Second Gear
P0733	Improper Ratio For Third Gear
P0734	Improper Ratio For Fourth Gear
P0735	Transmission Concern
P0736	Improper Ratio For Reverse Gear
P0741	TCC System Improper Mechanical Performance
P0743	Torque Converter Clutch System Electrical Failure
P0746	Electronic Pressure Control Solenoid Performance
P0750	Shift Solenoid No. 1 Circuit
P0751	Shift Solenoid No. 1 Performance
P0755	Shift Solenoid No. 2 Circuit
P0756	Shift Solenoid No. 2 Performance
P0760	Shift Solenoid No. 3 Circuit
P0761	Shift Solenoid No. 3 Performance
P0765	Transmission Concern
P0781	1 To 2 Shift Error
P0782	2 To 3 Shift Error
P0783	3 To 4 Shift Error
P0784	4 To 5 Shift Error
P0796	Transmission Concern
P0797	Transmission Concern
P0799	Transmission Concern
P0812	Reverse Switch Input Circuit Malfunction
P0813	Transmission Concern
P0815	Transmission Concern
P1000	OBD II Monitor Testing Incomplete
P1001	KOER Test Cannot Be Completed
P1039	Vehicle Speed Signal Missing Or Improper
P1051	Brake Switch Signal Missing Or Improper
P1100	Mass Air Flow Sensor Intermittent
P1101	Mass Air Flow Sensor Out Of Self Test Range
P1109	IAT Sensor 2 Intermittent
P1112	IAT Sensor Intermittent
P1114	IAT Sensor 2 Circuit Low Input
P1115	IAT Sensor 2 Circuit High Input
P1116	ECT Sensor Out Of Self Test Range
P1117	ECT Sensor Intermittent
P1120	TP Sensor Out Of Range Too Low
P1121	TP Sensor Inconsistent With MAF Sensor
P1124	TP Sensor Out Of Self Test Range
P1125	TP Sensor Intermittent
P1	HO2S Heater Not On During KOER Test
P1128	HO2S Sensor Signals Swapped
P1129	HO2S Sensor Signals Swapped
P1130	Lack Of Upstream HO2S Switch, Adaptive Fuel Limit, Bank No. 1
P1131	Lack Of Upstream HO2S Switch, Sensor Indicates Lean, Bank No. 1
P1132	Lack Of Upstream HO2S Switch, Sensor Indicates Rich, Bank No. 1
P1135	Ignition Switch Signal Missing Or Improper
P1137	Lack Of Downstream HO2S Switch, Sensor Indicates Lean, Bank No. 1
P1138	Lack Of Downstream HO2S Switch, Sensor Indicates Rich, Bank No. 1
P1150	Lack Of Upstream HO2S Switch, Adaptive Fuel Limit, Bank No. 2
P1151	Lack Of Upstream HO2S Switch, Sensor Indicates Lean, Bank No. 2
P1152	Lack Of Upstream HO2S Switch, Sensor Indicates Rich, Bank No. 2
P1157	Lack Of Downstream HO2S Switch, Sensor Indicates Lean, Bank No. 2
P1158	Lack Of Downstream HO2S Switch, Sensor Indicates Rich, Bank No. 2
P1168	Fuel Rail Pressure Sensor In Range But Low
P1169	Fuel Rail Pressure Sensor In Range But High
P1180	Fuel Delivery System Low
P1181	Fuel Delivery System High
P1183	Engine Oil Temperature Sensor Circuit Malfunction
P1184	Engine Oil Temperature Sensor Out Of Self-Test Range
P1220	Series Throttle Control Fault
P1224	Throttle Position Sensor B Out Of Self Test Range
P1229	Supercharger Intercooler Pump Not Operating
P1230	Open Power To Fuel Pump Circuit
P1231	High Speed Fuel Pump Relay Activated
P1232	Low Speed Fuel Pump Primary Circuit Failure
P1233	Fuel Pump Driver Module Off Line
P1234	Fuel Pump Driver Module Off Line
P1235	Fuel Pump Control Out Of Range
P1236	Fuel Pump Control Out Of Range
P1237	Fuel Pump Secondary Circuit Fault
P1238	Fuel Pump Secondary Circuit Fault
P1244	Alternator Load Input Low
P1245	Alternator Load Input High
P1246	Alternator Load Input Problem
P1250	Lack Of Power To FPRC Solenoid
P1260	THEFT Detected, Engine Disabled
P0	Engine RPM Or Vehicle Speed Limiter Reached
P1285	Cylinder Head Over Temperature Sensed
P1288	Cylinder Head Temperature Sensor Out Of Self Test Range
P1289	Cylinder Head Temperature Sensor Signal Greater Than Self Test Range
P1290	Cylinder Head Temperature Sensor Signal Less Than Self Test Range
P1299	Cylinder Head Temperature Sensor Detected Engine Overheating Condition
P1309	Misfire Detection Monitor Not Enabled
P1351	Ignition Diagnostic Monitor Circuit Input Fault
P1352	Ignition Coil A Primary Circuit Fault
P1353	Ignition Coil B Primary Circuit Fault
P1354	Ignition Coil C Primary Circuit Fault
P1355	Ignition Coil D Primary Circuit Fault
P1356	Loss of Ignition Diagnostic Module Input To PCM
P1358	Ignition Diagnostic Monitor Signal Out Of Self Test Range
P1359	Spark Output Circuit Fault
P1364	Ignition Coil Primary Circuit Fault
P1380	Variable Cam Timing Solenoid Valve Circuit Short Or Open
P1381	Variable Cam Timing Advance Excessive
P1383	Variable Cam Timing Advance Excessive
P1390	Octane Adjust Out Of Self Test Range
P1400	Differential Pressure Feedback Electronic Sensor Circuit Low Voltage
P1401	Differential Pressure Feedback Electronic Sensor Circuit High Voltage
P1403	Differential Pressure Feedback Electronic Sensor Hoses Reversed
P1405	Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose
P1406	Differential Pressure Feedback Electronic Sensor Circuit Downstream Hose
P1407	EGR No Flow Detected
P1408	EGR Flow Out Of Self Test Range
P1409	EGR Vacuum Regulator Circuit Malfunction
P1410	EGR Barometric Pressure Sensor VREF Voltage
P1411	Secondary Air Is Not Being Diverted
P1413	Secondary Air Injection System Monitor Circuit Low Voltage
P1414	Secondary Air Injection System Monitor Circuit High Voltage
P1442	Secondary Air Injection System Monitor Circuit High Voltage
P1443	Evaporative Emission Control System, Vacuum System, Purge Control Solenoid Or Purge Control Valve Fault
P1444	Purge Flow Sensor Circuit Input Low
P1445	Purge Flow Sensor Circuit Input High
P1450	Inability Of Evaporative Emission Control System To Bleed Fuel Tank
P1451	Lack Of Response From Passive Anti-Theft System Module, Engine Disabled
P1452	Inability Of Evaporative Emission Control System To Bleed Fuel Tank
P1455	Substantial Leak Or Blockage In Evaporative Emission Control System
P1460	Wide Open Throttle Air Conditioning Cutoff Circuit Malfunction
P1461	Air Conditioning Pressure Sensor Circuit Low Input
P1462	Air Conditioning Pressure Sensor Circuit high Input
P1463	Air Conditioning Pressure Sensor Insufficient Pressure Change
P1464	A/C Demand Out Of Self Test Range
P1469	Low A/C Cycling Period
P1473	Fan Secondary High With Fans Off
P1474	Low Fan Control Primary Circuit
	Hydraulic Cooling Fan Primary Circuit Failure
P1477	Medium Fan Control Primary Function Failure
P1479	High Fan Control Primary Circuit
P1480	Fan Secondary Low With Low Fans On
P1481	Fan Secondary Low With High Fans On
P1483	Power To Cooling Fan Exceeded Normal Draw
P1484	Variable Load Control Module Pin 1 Open
P1500	Vehicle Speed Sensor Intermittent
P1501	VSS Out Of Self-Test Range
P1502	Invalid Or Missing Vehicle Speed Message Or Brake Data (1998)
	VSS Intermittent (1999)
P1504	IAC Circuit Malfunction
P1505	IAC System At Adaptive Clip
P1506	IAC Over Speed Error
P1507	IAC Under Speed Error
P1512	Intake Manifold Runner Control Stuck Closed
P1513	Intake Manifold Runner Control Stuck Closed
P1516	Intake Manifold Runner Control Input Error
P1517	Intake Manifold Runner Control Input Error
P1518	Intake Manifold Runner Control Fault, Stuck Open
P1519	Intake Manifold Runner Control Stuck Open
P1520	Intake Manifold Runner Control Circuit Fault
P1530	Open Or Short To A/C Compressor Clutch Circuit
P1537	Intake Manifold Runner Control Stuck Open
P1538	Intake Manifold Runner Control Stuck Open
P1539	Power To A/C Compressor Clutch Circuit Exceeded Normal Current Draw
P1549	IMT Valve Vacuum Actuator Connection (1996-98)
	Intake Manifold Communications Control Circuit Malfunction (1999)
P1550	Power Steering Pressure Sensor Out Of Self Test Range
P1565	Speed Control System Concern
P1566	Speed Control System Concern
P1567	Speed Control System Concern
P1568	Speed Control System Concern
P1572	Brake Pedal Switch Circuit
P1605	PCM Keep Alive Memory Test Error
P1625	Voltage To Vehicle Load Control Module Fan Circuit Not Detected
P1626	Voltage To Vehicle Load Control Module Circuit Not Detected
P1633	Keep Alive Memory Power Voltage Low
P1635	Tire/Axle Ratio Out Of Acceptable Range
P1639	Vehicle ID Block Not Programmed Or Is Corrupt
P1640	Powertrain DTCs Available In Another Module
P1641	Fuel Pump Driver Module Concern
P1650	Power Steering Pressure Switch Out Of Self Test Range
P1651	Power Steering Pressure Switch Input Fault
P1700	Transmission Concern
P1701	Reverse Engagement Error
P1702	Transmission Concern
P1703	Brake On/Off Switch Out Of Self Test Range
P1704	Transmission Concern
P1705	Manual Lever Position Sensor Out Of Self Test Range
P1709	Park Or Neutral Position Switch Out Of Self Test Range
P1710	Transmission Concern
P1711	Transmission Fluid Temperature Sensor Out Of Self Test Range
P1713–P1728	Transmission Concern
P1729	4x4 Low Switch Error
P1740	Transmission Concern
P1741	Torque Converter Clutch Control Error
P1742	Torque Converter Clutch Solenoid Faulty
P1743	Torque Converter Clutch Solenoid Faulty
P1744	Torque Converter Clutch System Stuck In Off Position
P1745	Transmission Concern
P1746	Electronic Pressure Control Solenoid, Open Circuit
P1747	Electronic Pressure Control Solenoid, Short Circuit
P1749	Electronic Pressure Control Solenoid Failed Low
P1751	Shift Solenoid No. 1 Performance
P1754	Coast Clutch Solenoid Circuit Malfunction
P1756	Shift Solenoid No. 2 Performance
P1760	Transmission Concern
P1761	Shift Solenoid No. 3 Performance
P1762	Transmission Concern
P1767	Transmission Concern
P1780	Transmission Control Switch Circuit Out Of Self Test Range
P1781	4x4 Low Switch Out Of Self Test Range
P1783	Transmission Over Temperature Condition
P1784–P1789	Transmission Concern
P1900	Output Shaft Speed Sensor Circuit Intermittent Failure
P1901	Transmission Concern
U1020	Module Communications Network Concern
	SCP Invalid Or Missing Data For A/C Compressor Clutch (1998-99)
U1021, U1073 & U1131	Failure In Communication Between PCM & Variable Load Control Module (1994-97)
U1039	SCP Invalid Or Missing Data For Vehicle Speed (1998-2001)
U1039, U1051, U1135 & U1451	Module Communications Network Concern (1994-97)
U1041	SCP Invalid Or Missing Data For Vehicle Speed (1998-2001)
U1051	SCP Invalid Or Missing Data For Brakes (1998-2001)
U1131	SCP Invalid Or Missing Data For Fuel System (1998-2001)
U1147	SCP Invalid Or Missing Data For Vehicle Security (1998-99)
U1256	Variable Load Control Module Concern
U1262	SCP Communications Bus Fault
U1451	SCP Invalid Or Missing Data For Anti-Theft Module (1998-2001)
U1850	Invalid Or Missing Fuel system Data
U2243	SCP Invalid Or Missing Data For Exterior Environment (1998-2001)
UXXXX	PCM Concern (1994-97)
	U DTCs Received During Self-Test Of Another Module (1998-2001)