Ford OBD/OBD2 Codes >> Crown Victoria – Flex – Focus – Mustang (2005 – 2009)

ModelYearEngine identificationSystem
Crown Victoria 4.6L2006-09VIN  position 8 = V  Ford EEC-V
Flex 3.5L2009VIN  position 8 = C  Ford EEC-V
Focus 2.0/2.3L2005-09VIN  position 8 =  N/Z  Ford EEC-V
Mustang 4.0/4.6/5.4L2005-09VIN  position 8 = N/H/S  Ford EEC-V

General information

  • Malfunction indicator lamp (MIL) will illuminate or flash if certain faults are recorded.
  • ECM operates in backup mode if sensors fail , to enable vehicle to be driven to repair shop.


• Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC) 1


• Trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC).

Trouble code  identification

Scan codeFault locationProbable cause
PO,P2,UORefer to OBO-II trouble code tables
P1000System readiness test not complete
P1100Mass air flow (MAF) sensor -circuit intermittentWiring, MAF sensor
P1101Mass air flow (MAF) sensor -signal malfunctionWiring, battery, MAF sensor, ECM
P1112Intake air temperature (IAT) -circuit intermittentWiring, IAT sensor, ECM
P1114Intake air temperature (IAT) sensor 2 -low inputWiring short circuit to ground, IAT sensor, ECM
P1115Intake air temperature (IAT) sensor 2 -high inputWiring, IAT sensor, ECM
P1116Engine coolant temperature (ECT) sensor/cylinder head temperature (CHT) sensorout of self-test rangeWiring, cooling system fault, ECT sensor, CHTsensor, ECM
P1117Engine coolant temperature (ECT) sensor/cylinder head temperature (CHT) sensorcircuit intermittentWiring, cooling system fault, ECT sensor, CHT sensor, ECM
P1120Throttle position (TP) sensor -signal malfunction, lowWiring, TP sensor
P1121Throttle position (TP) sensor -inconsistent with mass air flow (MAF) sensor signalWiring, MAF sensor, TP sensor, air leak
P1124Throttle position (TP) sensor -signal malfunctionMechanical fault, TP sensor, ECM
P1125Throttle position (TP) sensor -circuit intermittentWiring, TP sensor
P1127Self-test not completed -heated oxygen sensor(H02S), not testedEngine not running long enough prior to self-test
P1156Engine control module (ECM)/fuel injector control module -malfunctionWiring, fuel injector control module, ECM
P1157Heated oxygen sensor (H02S) 2, bank 2 -not switching, fuel trim (FT) weak mixtureWiring, exhaust system leaking, H02S
P115EEngine control module (ECM) -data transmissionfaultThrottle position (TP), wiring, ECM
P117AEngine control module (ECM) -engine oiltemperatureEngine overheated, wiring, ECM
P1184Engine oil temperature (EOT) sensor -out of self-test rangeWiring, EOT sensor, ECM
P1227Supercharger (SC) wastegate -pressure highEGR valve, MAF sensor, SC wastegate actuator, SC
P1228Supercharger (SC) wastegate -pressure lowEGR valve, MAF sensor, SC wastegate actuator,SC
P1229Charge air cooler (CAC) pump -circuitmalfunctionWiring, CAC pump relay, CAC pump
P1229Supercharger (SC) intercooler pumpWiring, SC intercooler pump, SC intercooler pump relay, ECM
P1232Low speed fuel pump -malfunctionWiring, low speed fuel pump relay, ECM
P1233Fuel system -malfunctionWiring, IFS switch, fuel pump, fuel pump control module, ECM
P1234Fuel system -malfunctionWiring, IFS switch, fuel pump, fuel pump control module, ECM
P1235Fuel pump control -signal malfunctionWiring, fuel pump, fuel pump control module, ECM
P1236Fuel pump control -signal malfunctionWiring, fuel pump, fuel pump control module, ECM
P1237Fuel pump -circuit malfunctionWiring, fuel pump, fuel pump relay, fuel pump control module
P1238Fuel pump -circuit malfunctionWiring, fuel pump, fuel pump relay, fuel pump control module
P1244Alternator -high inputWiring, alternator, ECM
P1245Alternator -low inputWiring, drive belt, alternator, ECM
P1246AlternatorWiring, alternator, drive belt, ECM
P1260 P1261Theft detected -vehicle immobilized Injector circuit, cylinder 1 -high to low side short-Wiring short circuit
P1262Injector circuit, cylinder 2 -high to low side shortWiring short circuit
P1263Injector circuit, cylinder 3 -high to low side shortWiring short circuit
P1264Injector circuit, cylinder 4 -high to low side shortWiring short circuit
P1265Injector circuit, cylinder 5 high to low side shortWiring short circuit
P1266Injector circuit, cylinder 6 -high to low side shortWiring short circuit
P1267Injector circuit, cylinder 7 -high to low side shortWiring short circuit
P1268 P1270Injector circuit, cylinder 8 -high to low side short Maximum engine RPM or vehicle speed limit reachedWiring short circuit Engine over revved in neutral, wheel slippage
P1271Injector circuit, cylinder 1 -high to low side openWiring open circuit
P1272Injector circuit, cylinder 2 -high to low side openWiring open circuit
P1273Injector circuit, cylinder 3 -high to low side openWiring open circuit
P1274Injector circuit, cylinder 4 -high to low side openWiring open circuit
P1275Injector circuit, cylinder 5 -high to low side openWiring open circuit
P1276Injector circuit, cylinder 6 -high to low side openWiring open circuit
P1277Injector circuit, cylinder 7 -high to low side openWiring open circuit
P1278Injector circuit, cylinder 8 -high to low side openWiring open circuit
P1285Cylinder head temperature (CHT) sensor overheat conditionWiring, cooling system fault, CHT sensor
P1288Cylinder head temperature (CHT) sensor -out of self-test rangeWiring, cooling system fault, CHT sensor
P1289Cylinder head temperature (CHT) sensor high inputWiring, cooling system fault, CHT sensor
P128AEngine control module (ECM)/cylinder head temperature (CHT) sensor -high inputWiring, CHT sensor, ECM
P1290Cylinder head temperature (CHT) sensor -lowinputWiring, cooling system fault, CHT sensor
P1299Cylinder head temperature (CHT) sensor over temperature conditionWiring, cooling system fault, CHT sensor
P1309Misfire monitor disabledCMP sensor, CKP sensor, ECT sensor, MAF sensor, ECM
P1336Camshaft position (CMP) sensor/crankshaft position (CKP) sensor -signal malfunctionWiring, CMP sensor, CKP sensor, ECM
P1397System voltage -out of self-test rangeWiring, battery, alternator
P1405Exhaust gas recirculation (EGR) system -upstream hose off or pluggedEGR hoses
P1406Exhaust gas recirculation (EGR) system -downstream hose off or blockedEGR hoses
P1408Exhaust gas recirculation (EGR) system -out of self-test rangeWiring, EGR hoses, EGR valve, EGR solenoid,ECM
P1409Exhaust gas recirculation (EGR) solenoid -circuit malfunctionWiring, EGR solenoid, ECM
P1436Ale evaporator temperature sensor -low inputWiring, AlC evaporator temperature sensor, ECM
P1437Ale evaporator temperature sensor -high inputWiring, AlC evaporator temperature sensor, ECM
P1443Evaporative emission (EVAP) system -malfunctionWiring, EVAP system hoses, EVAP canister,EVAP canister purge valve
P1450Evaporative emission (EVAP) system, vent control -circuit malfunctionWiring, EVAP system hoses, EVAP canister purge valve, fuel filler cap blocked
P1451Evaporative emission (EVAP) canister purge valve -circuit malfunctionWiring, EVAP canister purge valve, ECM
P145EPositive crankcase ventilation (PCV) heatercircuit malfunctionWiring, PCV valve
P1460Wide open throttle (WOT) relay, AlC -circuit malfunctionWiring, WOT relay, ECM
P1461AlC refrigerant pressure sensor -high voltageWiring, AlC refrigerant pressure sensor, ECM
P1462AlC refrigerant pressure sensor -low voltageWiring, AlC refrigerant pressure sensor, ECM
P1463Ale refrigerant pressure sensor -insufficient pressure changeWiring, AlC system -mechanical fault, AlC refrigerant pressure sensor, AlC compressor clutch
P1464Ale demand -signal out of self-test rangeWiring, AlC ON -during self-test, WOT relay (AlC cut-out), ECM
P1469Frequent AlC compressor clutch cyclingWiring, AlC system -mechanical fault
P1474Engine coolant blower motor (low speed) control circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1477Engine coolant blower motor (medium speed) -control circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1479Engine coolant blower motor (high speed) control circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1489Crankcase breather heater -circuit malfunctionWiring, crankcase breather heater
P1500Vehicle speed sensor (VSS) -circuit intermittentWiring, VSS, ECM
P1501Vehicle speed sensor (VSS) -out of self-test rangeElectro-magnetic interference
P1502Vehicle speed sensor (VSS) -intermittent signalWiring, VSS/ABS wheel speed sensors
P1504Idle air control (lAC) valve -c.ircuit malfunctionWiring, lAC valve, ECM
P1506Idle air control (lAC) valve -over-speed errorWiring, lAC valve, vacuum leaks, ECM
P1507Idle air control (lAC) valve -under-speed errorWiring, lAC valve, hose blocked, ECM
P1512Intake manifold runner control (IMRC) module -malfunction, stuck closed (bank 1)Wiring, mechanical fault, ECM
P1513Intake manifold runner control (IMRC) module -malfunction, stuck closed (bank 2)Wiring, mechanical fault, ECM
P1516Intake manifold runner control (IMRC) module -input error (bank 1)Wiring, mechanical fault
P1517Intake manifold runner control (IMRC) module -input error (bank 2)Wiring, mechanical fault
P1518Intake manifold runner control (IMRC) module -malfunction, stuck openWiring, IMRC actuator, ECM
P1519Intake manifold runner control (IMRC) module -malfunction, stuck closedWiring, IMRC actuator, ECM
P151AIntake manifold runner control (IMRC) module -malfunctionWiring, IMRC actuator, ECM
P1520Intake manifold runner control (IMRC) module -circuit malfunctionWiring, mechanical fault, vacuum hoses, IMRC actuator, ECM
P1537Intake manifold runner control (IMRC) module -malfunction, stuck open (bank 1)Wiring, hoses blocked, mechanical fault, ECM
P1538Intake manifold runner control (IMRC) module -malfunction, stuck open (bank 2)Wiring, hoses blocked, mechanical fault, ECM
P1549Intake manifold air control system -malfunctionWiring, intake manifold air control solenoid, ECM
P1550Power steering pressure (PSP) sensor malfunctionWiring, PSP sensor, ECM
P1565Cruise control systemWiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1566Cruise control systemWiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1567Cruise control systemWiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1568Cruise control systemWiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1572Brake pedal position (BPP) switch -circuit intermittentWiring, BPP switch, brake fluid pressure (BFP) switch, ECM
P1582Engine control module (ECM) -throttle data storedAirbag deployment
P1605‘Keep alive’ memory test failureWiring, battery terminal corrosion, loose battery connection, ECM
P1633‘Keep alive’ power supply -voltage too lowWiring, ECM
P1635Tire/axle ratio out of rangeIncorrect tire size, incorrect axle ratio, incorrect vehicle 10 configuration
P1636Engine control module (ECM) -internal faultECM
P1639Engine control module (ECM) -invalid or missing dataIncorrect vehicle 10 configuration, ECM
P1640Diagnostic trouble codes storedP-codes stored in another control module
P1641Fuel pump -circuit malfunctionWiring, fuel pump relay, fuel pump, ECM
P1646Engine control module (ECM) -linear oxygen sensor (02S) control, bank 1Non OEM accessories, ECM programming, ECM
P1647Engine control module (ECM) -linear oxygen sensor (02S) control, bank 2Non OEM accessories, ECM programming, ECM
P1650Power steering pressure (PSP) switch -malfunctionWiring, PSP switch, steering wheel turned during self-test, ECM
P1651Power steering pressure (PSP) switch -inputWiring, vehicle towed with engine running, PSP switch, OTC not erased, ECM
P1674Engine control module (ECM) -malfunctionWiring, software incompatibility, ECM
P1703Brake pedal position (BPP) switch -out of self-test rangeWiring, brake pedal depressed during self-test, rear electronic module/lights control module, BPP switch, ECM
P1705Transmission range (TR) sensor -out of self-test rangeWiring, TR sensor
P1709Park/neutral position (PNP) switch/clutch pedal position (CPP) switch -out of self-test rangeWiring, PNP switch/CPP switch, ECM
P1780Overdrive selection switchWiring, transmission control switch, ECM
P1900Output shaft speed (OSS) sensor -circuitintermittentWiring, poor connection, OSS sensor, ECMITCM
P1901Turbine shaft speed (TSS) sensor -circuitintermittentWiring, poor connection, TSS sensor, ECMITCM
P1910Reversing lamps -circuit malfunctionWiring, reverse gear position switch, ECM
U1011CAN data bus, air intake -invalid or missing dataWiring, ECM (alternative fuel), ECM
U1020CAN data bus, AlC -AlC compressor clutch invalid or missing dataWiring, AlC trouble code(s) stored
U1021CAN data bus, AlC -communication errorWiring, AlC trouble code(s) stored, ECM
U1039CAN data bus, antilock brake system (ASS) vehicle speed invalid or missing dataWiring, ABS trouble code(s) stored
U1041CAN data bus, antilock brake system (ASS) vehicle speed invalid or missing dataWiring, ABS trouble code(s) stored
U1051CAN data bus, engine control module (ECM)brake signal invalid or missing dataWiring, BPP switch, bulb(s)
U1071CAN data bus, engine sensor data -invalid ormissing dataWiring, ECM (alternative fuel), ECM
U1073CAN data bus, cooling system communication errorWiring, variable load control module, ECM(alternative fuel) -if fitted, ECM
U1089CAN data bus, active suspension -invalid ormissing dataWiring, active suspension trouble code(s) stored
U1098CAN data bus, antilock brake system (ASS)vehicle speed invalid or missing dataWiring, ABS trouble code(s) stored
U1130CAN data bus, fuel pump -communication errorWiring, instrument panel, ECM
U1131CAN data bus, fuel pump -communication errorWiring, instrument panel, ECM
U1137CAN data bus, instrument panel warning devicesinvalid or missing dataWiring, instrument panel
U1147CAN data bus, alarmWiring, alarm system trouble code(s) stored
U1243CAN data bus , AlC -invalid or misSing dataWiring, AlC system trouble code(s) stored
U1260CAN data bus -communication errorWiring, ECM (alternative fuel)
U1261CAN data bus -communication errorWiring, ECM (alternative fuel)
U1262CAN data bus -communication errorWiring, trouble code(s) stored in other control modules
U1451CAN data bus, alarmWiring, alarm system trouble code(s) stored
U2015Signal link faultCompuvalve/ECM (alternative fuel)
U2195CAN data bus, lights control module invalid or missing dataWiring, lights control module trouble code(s) stored