EEC-V OBD-II Diagnostic Codes


By Ken Payne


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


4×4 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


4×4 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)

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