Lincoln Mark LT – MKS – MKX – MKZ – Zephr (2006 – 2009) Trouble Code Info

Model Year Engine identification System
Mark LT  5.4L 2006-08 VIN  position 8 = 5 Ford EEC-V
MKS 3.7L 2009 VIN  position 8 = R Ford EEC-V
MKX 3.5L 2007-09 VIN  position  8  = C Ford EEC-V
MKZ 3.5L 2007-09 VIN  position 8 =  T Ford EEC-V
Zephyr 3.0L 2006-07 VIN  position 8 =  1 Ford EEC-V

General information

  • Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults.
  • 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.
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Accessing

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

Erasing

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

Trouble code  identification

Scan code Fault location Probable cause
PO, P2,UO Refer to OBO-II trouble code tables
P1000 System readiness test not complete
P1001 Self-test
P1100 Mass air flow (MAF) sensor -circuit intermittent Wiring, MAF sensor
P1101 Mass air flow (MAF) sensor -signal malfunction Wiring, battery, MAF sensor, ECM
P1112 Intake air temperature (IAT) -circuit intermittent Wiring, IAT sensor, ECM
P1114 Intake air temperature (IAT) sensor 2 -low input Wiring short circuit to ground, IAT sensor, ECM
P1115 Intake air temperature (IAT) sensor 2 -high input Wiring, IAT sensor, ECM
P1116 Engine coolant temperature (ECT) sensor/cylinder head temperature (CHT) sensor out of self-test range Wiring, cooling system fault, ECT sensor, CHT sensor, ECM
P1117 Engine coolant temperature (ECT) sensor/cylinder head temperature (CHT) sensor circuit intermittent Wiring, cooling system fault, ECT sensor, CHT sensor, ECM
P1120 Throttle position (TP) sensor -signal malfunction, low Wiring, TP sensor
P1124 Throttle position (TP) sensor -signal malfunction Mechanical fault, TP sensor, ECM
P1125 Throttle position (TP) sensor -circuit intermittent Wiring, TP sensor
P1127 Self-test not completed -heated oxygen sensor (H02S), not tested Engine not running long enough prior to self-test
P1156 Engine control module (ECM)/fuel injector control module -malfunction Wiring, fuel injector control module, ECM
P115E Engine control module (ECM) -data transmission fault Throttle position (TP) sensor, wiring, ECM
P117A Engine control module (ECM) -engine oil temperature Engine overheated, wiring, ECM
P1184 Engine oil temperature (EOT) sensor -out of self-test range Wiring, EOT sensor, ECM
P1229 Supercharger (SC) intercooler pump Wiring, SC intercooler pump, SC intercooler pump relay, ECM
P1233 Fuel system -malfunction Wiring, IFS switch, fuel pump, fuel pump control module, ECM
P1234 Fuel system -malfunction Wiring, IFS switch, fuel pump, fuel pump control module, ECM
P1235 Fuel pump control -signal malfunction Wiring, fuel pump, fuel pump control module, ECM
P1236 Fuel pump control -signal malfunction Wiring, fuel pump, fuel pump control module, ECM
P1237 Fuel pump -circuit malfunction Wiring, fuel pump, fuel pump relay, fuel pump control module
P1238 Fuel pump -circuit malfunction Wiring, fuel pump, fuel pump relay, fuel pump control module
P1244 Alternator -high input Wiring, alternator, ECM
P1245 Alternator -low input Wiring, drive belt, alternator, ECM
P1246 Altemator Wiring, alternator, drive belt, ECM
P1260 Theft detected -vehicle immobilized
P1261 Injector circuit, cylinder 1 -high to low side short Wiring short circuit
P1262 Injector circuit, cylinder 2 -high to low side short Wiring short circuit
P1263 Injector circuit, cylinder 3 -high to low side short Wiring short circuit
P1264 Injector circuit, cylinder 4 -high to low side short Wiring short circuit
P1265 Injector circuit, cylinder 5 -high to low side short Wiring short circuit
P1266 Injector circuit, cylinder 6 -high to low side short Wiring short circuit
P1267 Injector circuit, cylinder 7 -high to .Iow side short Wiring short circuit
P1268 Injector circuit, cylinder 8 -high to low side short Wiring short circuit
P1270 Maximum engine RPM or vehicle speed limit reached Engine over revved in neutral, wheel slippage
P1271 Injector circuit, cylinder 1 -high to low side open Wiring open circuit
P1272 . Injector circuit, cylinder 2 -high to low side open Wiring open circuit
P1273 Injector circuit, cylinder 3 -high to low side open Wiring open circuit
P1274 Injector circuit, cylinder 4 -high to low side open Wiri~g open circuit
P1275 Injector circuit, cylinder 5 -high to low side open Wiring open circuit
P1276 Injector circuit, cylinder 6 -high to low side open Wiring open circuit
P1277 Injector circuit, cylinder 7 -high to low side open Wiring open circuit
P1278 P1285 Injector circuit, cylinder 8 -high to low side open Cylinder head temperature (CHT) sensoroverheat condition Wiring open circuit Wiring, cooling system fault, CHT sensor
P1288 Cylinder head temperature (CHT) sensor -out of self-test range Wiring, cooling system fault, CHT sensor
P1289 Cylinder head temperature (CHT) sensor-highinput Wiring, COOling system fault, CHT sensor
P128A Engine control module (ECM)/cylinder head temperature (CHT) sensor -high input Wiring, CHT sensor, ECM
P1290 Cylinder head temperature (CHT) sensor -low input Wiring, cooling system fault, CHT sensor
P1299 Cylinder head temperature (CHT) sensor over temperature condition Wiring, cooling system fault, CHT sensor
P1309 Misfire monitor disabled CMP sensor, CKP sensor, ECT sensor, MAF sensor, ECM
P1336 Camshaft position (CMP) sensor/crankshaft position (CKP) sensor -signal malfunction Wiring, CMP sensor, CKP sensor, ECM
P1397 System voltage -out of self-test range Wiring, battery, alternator
P1405 Exhaust gas recirculation (EGR) system -upstream hose off or plugged EGR hoses
P1406 Exhaust gas recirculation (EGR) system -downstream hose off or blocked EGR hoses
P1408 Exhaust gas recirculation (EGR) system -out of self-test range Wiring, EGR hoses, EGR valve, EGR solenoid, ECM
P1409 Exhaust gas recirculation (EGR) solenoid -circuitmalfunction Wiring, EGR solenoid, ECM
P1436 AlC evaporator temperature sensor -low input Wiring, AlC evaporator temperature sensor, ECM
P1437 AlC evaporator temperature sensor -high input Wiring, Ale evaporator temperature sensor, ECM
P1443 Evaporative emission (EVAP) system -malfunction Wiring, EVAP system hoses, EVAP canister, EVAP canister purge valve
P1450 Evaporative emission (EVAP) system, vent control -circuit malfunction Wiring, EVAP system hoses, EVAP canister purge valve, fuel filler cap blocked
P1451 Evaporative emission (EVAP) canister purge valve -circuit malfunction Wiring, EVAP canister purge valve, ECM
P145E Positive crankcase ventilation (PCV) heater circuit malfunction Wiring, PCV valve
P1460 Wide open throttle (WOT) relay, AlC -circuit malfunction Wiring, WOT relay, ECM
P1461 AlC refrigerant pressure sensor -high voltage Wiring, AlC refrigerant pressure sensor, ECM
P1462 AlC refrigerant pressure sensor -low voltage Wiring, AlC refrigerant pressure sensor, ECM
P1463 AlC refrigerant pressure sensor -insufficientpressure change Wiring, AlC system -mechanical fault, AlC refrigerant pressure sensor, AlC compressor clutch
P1464 AlC demand -signal out of self-test range Wiring, AlC ON -during self-test, WOT relay (AlC cut-out), ECM
P1469 Frequent AlC compressor clutch cycling Wiring, AlC system -mechanical fault
P1474 Engine coolant blower motor (low speed)control circuit malfunction Wiring, engine coolant blower motor relay, ECM
P1477 Engine coolant blower motor (medium speed) -control circuit malfunction Wiring, engine coolant blower motor relay, ECM
P1479 Engine coolant blower motor (high speed)control circuit malfunction Wiring, engine coolant blower motor relay, ECM
P1489 Crankcase breather heater -circuit malfunction Wiring, crankcase breather heater
P1500 Vehicle speed sensor (VSS) -circuit intermittent Wiring, VSS, ECM
P1501 Vehicle speed sensor (VSS) -out of self-test range Electro-magnetic interference
P1502 Vehicle speed sensor (VSS) -intermittent signal Wiring, VSS/ABS wheel speed sensors
P1504 Idle air control (lAC) valve -circuit malfunction Wiring, lAC valve, ECM
P1506 Idle air control (lAC) valve -over-speed error Wiring, lAC valve, vacuum leaks, ECM
P1507 Idle air control (lAC) valve -under-speed error Wiring, lAC valve, hose blocked, ECM
P1512 Intake manifold runner control (IMRC) module -malfunction, stuck closed (bank 1) Wiring, mechanical fault, ECM
P1513 Intake manifold runner control (IMRC) module -malfunction, stuck closed (bank 2) Wiring, mechanical fault, ECM
P1516 Intake manifold runner control (IMRC) module -input error (bank 1) Wiring, mechanical fault
P1517 Intake manifold runner control (IMRC) module -input error (bank 2) Wiring, mechanical fault
P1518 Intake manifold runner control (IMRC) module -malfunction, stuck open Wiring, IMRC actuator, ECM
P1519 Intake manifold runner control (IMRC) module -malfunction, stuck closed Wiring, IMRC actuator, ECM
P151A Intake manifold runner control (IMRC) module -malfunction Wiring, IMRC actuator, ECM
P1520 Intake manifold runner control (IMRC) module -circuit malfunction Wiring, mechanical fault, vacuum hoses, IMRC actuator, ECM
P1537 Intake manifold runner control (IMRC) module -malfunction, stuck open (bank 1) Wiring, hoses blocked, mechanical fault, ECM
P1538 Intake manifold runner control (IMRC) module -malfunction, stuck open (bank 2) Wiring, hoses blocked, mechanical fault, ECM
P1549 Intake manifold air control system -malfunction Wiring, intake manifold air control solenoid, ECM
P1550 Power steering pressure (PSP) sensormalfunction Wiring, PSP sensor, ECM
P1565 Cruise control system Wiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1566 Cruise control system Wiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1567 Cruise control system Wiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1568 Cruise control system Wiring, CPP switch, BPP switch, cruise control module, cruise control master switch, VSS
P1572 Brake pedal position (BPP) switch -circuitintermittent Wiring, BPP switch, brake fluid pressure (BFP) switch, ECM
P1582 Engine control module (ECM) -throttle data stored Airbag deployment
P1633 ‘Keep alive’ power supply -voltage too low Wiring, ECM
P1635 Tire/axle ratio out of range Incorrect tire size, incorrect axle ratio, incorrect vehicle 10 configuration
P1636 Engine control module (ECM) -intemal fault ECM
P1639 Engine control module (ECM) -invalid or missing data Incorrect vehicle ID configuration, ECM
P1640 Diagnostic trouble codes stored P-codes stored in another control module
P1641 P1646 Fuel pump -circuit malfunction Engine control module (ECM) -linear oxygen sensor (02S)control, bank 1 Wiring, fuel pump relay, fuel pump, ECM Non OEM accessories, ECM programming, ECM
P1647 Engine control module (ECM) -linear oxygen sensor (02S) control, bank 2 Non OEM accessories, ECM programming, ECM
P1650 Power steering pressure (PSP) switch -malfunction Wiring, PSP switch, steering wheel turned during self-test, ECM
P1651 Power steering pressure (PSP) switch -input Wiring, vehicle towed with engine running, PSP switch, OTC not erased, ECM
P1674 Engine control module (ECM) -malfunction Wiring, software incompatibility, ECM
P1703 Brake pedal position (BPP) switch -out of self-test range Wiring, brake pedal depressed during self-test, rear electronic module/lights control module, BPP switch, ECM
P1705 Transmission range (TR) sensor -out of self-test range Wiring, TR sensor
P1709 Park/neutral pOSition (PNP) switch/clutch pedal position (CPP) switch -out of self-test range Wiring, PNP switch/CPP switch, ECM
P1729 4x4L switch -malfunction Wiring, four wheel drive shift control module, ECM
P1780 Overdrive selection switch Wiring, transmission control switch, ECM
P1781 4x4L switch -out of self-test range Wiring, four wheel drive shift control module, 4x4L switch, ECM
P1900 Output shaft speed (OSS) sensor -circuit intermittent Wiring, poor connection, OSS sensor, ECMITCM
P1901 Turbine shaft speed (TSS) sensor -circuit intermittent Wiring, poor connection, TSS sensor, ECMITCM
P1910 Reversing lamps -circuit malfunction Wiring, reverse gear position switch, ECM
U1011 CAN data bus, air intake -invalid or missing data Wiring, ECM (alternative fuel), ECM
U1020 CAN data bus, AlC -AlC compressor clutchinvalid or missing data Wiring, AlC trouble code(s) stored
U1021 CAN data bus, AlC -communication error Wiring, AlC trouble code(s) stored, ECM
U1039 CAN data bus, antilock brake system (ABS)vehicle speed invalid or missing data Wiring, ABS trouble code(s) stored
U1041 CAN data bus, antilock brake system (ABS)vehicle speed invalid or missing data Wiring, ABS trouble code(s) stored
U1051 CAN data bus, engine control module (ECM)brake signal invalid or missing data Wiring, BPP switch, bulb(s)
U1071 CAN data bus, engine sensor data -invalid or missing data Wiring, ECM (alternative fuel), ECM
U1073 CAN data bus, cooling system communication error Wiring, variable load control module, ECM (alternative fuel) -if fitted, ECM
U1089 CAN data bus, active suspension -invalid or missing data Wiring, active suspension trouble code(s) stored
U1098 CAN data bus, antilock brake system (ABS)vehicle speed invalid or missing data Wiring, ABS trouble code(s) stored
U1130 CAN data bus, fuel pump -communication error Wiring, instrument panel, ECM
U1131 CAN data bus, fuel pump -communication error Wiring, instrument panel, ECM
U1137 CAN data bus, instrument panel warning devices -invalid or missing data Wiring, instrument panel
U1147 CAN data bus, alarm Wiring, alarm system trouble code(s) stored
U1243 CAN data bus, AlC -invalid or missing data Wiring, AlC system trouble code(s) stored
U1260 CAN data bus -communication error Wiring, ECM (alternative fuel)
U1261 CAN data bus -communication error Wiring, ECM (alternative fuel)
U1262 CAN data bus -communication error Wiring, trouble code(s) stored in other control modules
U1451 CAN data bus, alarm Wiring, alarm system trouble code(s) stored
U2015 Signal link fault Compuvalve/ECM (alternative fuel)
U2195 CAN data bus, lights control module -invalid or missing data Wiring, lights control module trouble code(s) stored