Land Rover Discovery 4.0/4.6L – Freelander 2.5L – LR2 3.2L – LR3 4.0/4.4L Range Rover 4.0/4.2/4.4/4.6/Sport 4.2/4.4L (1998 – 2008) OBD1 Codes

Model	Year	Engine identification	System
Discovery 4.0/4.6L	1998-04	360/560/940	Bosch Motronic MS.2.1 0 Bosch Motronic ME7.2 Denso PAG EMS Sagem/Lucas GEMS 8.0/8.2 Siemens EMS 2000
Freelander 2.5L	2001-06	KV6
LR2 3.2L	2008	(VIN 8 = N)
LR3 4.0/4.4L	2005-08	406PN/448PN
Range Rover 4.0L	1998-00	420/580
Range Rover 4.2/4.4L	2003-08	42/44 8S 2
Range Rover 4.6L	1998-02	46D/60D
Range Rover Sport 4.2/4.4L	2006-08	428PS/448PN

General information

Engine control module (ECM) incorporates self-diagnosis function.
Malfunction indicator lamp (MIL) will illuminate if certain faults are recorded.
ECM operates in backup mode if sensors fail, to enable vehicle to be driven to workshop.

Accessing

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

o Range Rover -> 2001 – fascia, passenger’s side [1].
o Range Rover 2001 -> fascia, driver’s side [2]
o Range Rover Sport 2005 ->/Discovery/LR3 – fascia, driver’s side [3].
o Freelander -> 2001 – under fascia, passenger’s side [4].
o Freelander 2001 ->under fascia, driver’s side [5]

Erasing

After the faults have been rectified, trouble codes can only be erased by using a Scan Tool connected to the data link connector (DLC)

Trouble code identification

OBD-II type	Fault location	Probable cause
PO,P2,UO	Refer to EOBD trouble code tables	–
P1000	Engine control module (ECM) memory erased – no codes stored	Memory erased, ECM
P1100	Mass air flow (MAF) sensor/volume air flow (VAF) sensor- circuit malfunction	Wiring, supply voltage, ground connection, MAF sensor, ECM
P1101	Mass air flow (MAF) sensor/volume air flow (VAF) sensor- range/performance problem	Wiring, supply voltage, ground connection, intake leak, MAF sensor, ECM
P1102	Mass air flow (MAF) sensor/volume air flow (VAF) sensor- voltage low	Wiring short to ground, supply voltage, ground connection, MAF sensor, ECM
P1112	Intake air temperature (IAT) sensor- circuit intermittent	Wiring, poor connection, IAT sensor, ECM
P1116	Engine coolant temperature (ECT) sensor – range/performance problem	Wiring, ECT sensor, ECM
P1117 0	Radiator outlet engine coolant temperature (ECT) – low input	Wiring, ECT sensor, ECM
P1117 fJ	Engine coolant temperature (ECT) sensor – circuit intermittent	Wiring, ECT sensor, ECM
P1118	Radiator QUtlet engine coolant temperature (ECT) – high input	Wiring, ECT sensor, ECM
P1120	Throttle position (TP) sensor .- range/ performance problem	Wiring, supply voltage, TP sensor, ECM
P1121	Throttle position (TP) sensor – range/ performance problem	Wiring, supply voltage, TP sensor, ECM
P1122	Throttle position (TP) sensor – circuit malfunction	Wiring, supply voltage, TP sensor, ECM
P1123	Throttle position (TP) sensor – voltage low	Wiring short to ground, supply voltage, ground connection, TP sensor, ECM
P1124	Throttle position (TP) sensor- voltage high	Wiring open circuit/short to positive, TP sensor, ECM
P1125	Throttle position (TP) sensor- circuit intermittent	Wiring, TP sensor, ECM
P1128	Heated oxygen sensor (H02S), upstream – transposed	Wiring transposed
P1129	Heated oxygen sensors (H02S) 1 – sensors transposed	Wiring
P1130	Heated oxygen sensor (H02S), upstream, bank 1 – range/performance problem	Wiring, heater supply voltage, ground connection, H02S, ECM
P1131	Heated oxygen sensor (H02S), upstream, bank 1 – mixture too lean	Intake leak, fuel pressure low, injector(s) blocked, H025, ECM
P1132	Heated oxygen sensor (H02S), upstream, bank 1 – mixture too rich	Intake blockage, fuel pressure high, injector(s) leaking, H025, ECM
P1137	Heated oxygen sensor (H02S) 2 -cylinders 1, 2, 3 – mixture lean	Wiring, H025
P1138	Heated oxygen sensor (H02S) 2 -cylinders 1, 2, 3 – mixture rich	Wiring, H02S
P1150	Heated oxygen sensor (H02S), upstream, bank 2 – range/performance problem	Wiring, heater supply voltage, ground connection, H025, ECM
P1151	Heated oxygen sensor (H02S), upstream, bank 2 – mixture too lean	Intake leak, fuel pressure low, injector(s) blocked, H02S, ECM
P1152	Heated oxygen sensor (H02S), upstream, bank 2 – mixture too rich	Intake blockage, fuel pressure high, injector(s) leaking, H025, ECM
P1157	Heated oxygen sensor (H02S) 2 – cylinders 4, 5, 6 – mixture lean	Wiring, H02S
P1158	Heated oxygen sensor (H02S) 2 -cylinders 4,5, 6 – mixture rich	Wiring, H025
P1161	Heated oxygen sensor (H02S), too rich, bank 1 – circuit malfunction	Wiring, H02S, ECM
P1162	Heated oxygen sensor (H02S), too weak, bank 1 – circuit malfunction	Wiring, H025, ECM
P1163	Heated oxygen sensor (H02S), too rich, bank 2 – circuit malfunction	Wiring, H025, ECM
P1164	Heated oxygen sensor (H02S), too weak, bank 2 – circuit malfunction	Wiring, H02S, ECM
P1170	Downstream fuel trim (FT), bank 1 – malfunction	Wiring, H02S
P1171	System too lean, bank 1	Intake/fuel system, injectors, H025, MAFNAF sensor, ECT sensor
P1172	System too rich, bank 1 & 2	Intake/fuel system, injectors, H025, MAFNAF sensor, ECT sensor
P1173	Downstream fuel trim (FT), bank 2 – malfunction	Intake/fuel system, injectors, H02S, MAFNAF sensor, ECT sensor
P1174	System too lean, bank 2	Intake/fuel system, injectors, H025, MAFNAF sensor, ECT sensor
P1175	System too rich, bank 2	Intake/fuel system, intake/exhaust leak, bank 2
P1176	Fuel trim (FT) lean mixture	Fuel pressure, injectors, MAF sensor/ MAP sensor, intake leak
P1177	Fuel trim (FT) rich mixture	Fuel pressure, injectors, MAF sensor/ MAP sensor, EVAP system
P1178	Fuel trim (FT) lean mixture	Fuel pressure, injectors, MAF sensor/ MAP sensor, intake leak
P1179	Fuel trim (FT) rich mixture	Fuel pressure, injectors, MAF sensor/ MAP sensor, intake leak
P1185	Oxygen sensor heater 1 – cylinders 1, 2, 3, 4, 5, 6	Wiring, H02S
P1186	Oxygen sensor heater 1 – cylinders 1, 2, 3, 4, 5, 6	Wiring, H025
P1187	Oxygen sensor heater 1 – cylinders 1, 2, 3, 4, 5, 6 – circuit malfunction	Wiring, H02S
P1188	Fuel trim (FT), bank 1 – adaptation	Intake/fuel system, injectors, H02S, MAFNAF sensor, ECT sensor
P1189	Fuel trim (FT), bank 2 – adaptation	Intake/fuel system, injectors, H025, MAFNAF sensor, ECT sensor
P1190	Oxygen sensor heater 1 – cylinders 1, 2, 3, 4, 5, 6 – heater resistance low	Wiring, H02S
P1191	Oxygen sensor heater 2 – cylinders 1, 2, 3, 4, 5, 6	Wiring, H02S
P1192	Oxygen sensor heater 2 – cylinders 1, 2, 3, 4, 5,6	Wiring, H02S
P1193	Oxygen sensor heater 2 – cylinders 1, 2, 3, 4, 5, 6 – circuit malfunction	Wiring, H025
P1194	Oxygen sensor heater 2 – cylinders 1, 2, 3, 4, 5, 6 – heater resistance	Wiring, H02S
P1195	Oxygen sensor heater 2 – cylinders 1, 2, 3, 4, 5, 6 – heater resistance low	Wiring, H02S
P1196	Oxygen sensor heater 2- cylinders 1, 2, 3, 4, 5, 6 – heater resistance low	Wiring, H025
P1199	Fuel level sensor	Wiring, fuel level sensor
P1201	Injector – cylinder 1 – open/short circuit to ground	Wiring, injector
P1202	Injector – cylinder 2 – open/short circuit to ground	Wiring, injector
P1203	Injector – cylinder 3 – open/short circuit to ground	Wiring, injector
P1204	Injector – cylinder 4 – open/short circuit to ground	Wiring, injector
P1205	Injector – cylinder 5 – open/short circuit to ground	Wiring, injector
P1206	Injector- cylinder 6 – open/short circuit to ground	Wiring, injector
P1207	Injector – cylinder 7 – open/short circuit to ground	Wiring, injector
P1208	Injector – cylinder 8 – open/short circuit to ground	Wiring, injector
P1222	Accelerator pedal position (APP) sensor – low input	Wiring short to ground, APP sensor
P1230	Fuel pump (FP) relay – open circuit	Wiring, FP relay
P1231 0	Fuel pump (FP) relay – short circuit to positive	Wiring, FP relay
P1231 f)	Fuel pump (FP) – high speed	Wiring, supply voltage, ground connection, FP, ECM
P1232 0	Fuel pump (FP) relay – short circuit to ground	Wiring, FP relay
P1232 f)	Fuel pump (FP) – circuit malfunction	Wiring, supply voltage, ground connection, FP, ECM
P1235	Fuel pump (FP) – range/performance problem	Wiring, FP, ECM
P1244	Alternator, load input – voltage low	Wiring short to ground, alternator, ECM
P1245	Alternator, load input – voltage high	Wiring short to ground, battery was disconnected, alternator, ECM
P1246	Alternator, load input – circuit malfunction	Wiring, ground connection, alternator, ECM
P1260	Engine disabled by PATS	Incorrect/damaged key, wiring, immobilizer defective, ECM
P1270	Engine speed (RPM) – range/performance problem	Engine over revved in neutral, wheel slippage
P1287	Engine fuel demand – range/performance problem	Intake/exhaust leak, intake blocked, MAFNAF sensor, fuel pressure/pump, injector(s), EGR system, EVAP canister purge valve, H025
P1288	Cylinder head temperature – range/ performance problem	Wiring, cooling system fault, ECM
P1289	Cylinder head temperature – voltage high	Wiring, cooling system fault, ECM
P1290	Cylinder head temperature – voltage low	Wiring, cooling system fault, ECM
P1299	Cylinder head temperature – protection active	Wiring, cooling system fault, ECM
P1300	Random/multiple cylinder(s) – misfire detected	Engine mechanical fault, wiring, ignition/fuel system, injector, ECT/MAF sensor, ECM
P1301	Cylinder 1 – misfire detected	Engine mechanical fault, wiring, ignition/fuel system, injector, ECTIMAF sensor, ECM
P1302 –	Cylinder 2 – misfire detected	Engine mechanical fault, wiring, ignitionlfuel system, injector, ECT/MAF sensor, ECM
P1303	Cylinder 3 – misfire detected	Engine mechanical fault, wiring, ignition/fuel system, injector, ECT/MAF sensor, ECM
P1304	Cylinder 4 – misfire detected	Engine mechanical fault, wiring, ignition/fuel system, injector, ECTIMAF sensor, ECM
P1305	Cylinder 5 – misfire detected	Engine mechanical fault, wiring, ignitionlfuel system, injector, ECTIMAF sensor, ECM
P1306	Cylinder 6 – misfire detected	Engine mechanical fault, wiring, ignitionlfuel system, injector, ECTIMAF sensor, ECM
P1307	Cylinder 7 – misfire detected	Engine mechanical fault, wiring, ignition/fuel system, injector, ECT/MAF sensor, ECM
P1308	Cylinder 8 – misfire detected	Engine mechanical fault, wiring, ignitionlfuel system, injector, ECTIMAF sensor, ECM
P1313	Misfirelcatalyst damage – bank 1	Engine mechanical fault, wiring, ignitionlfuel system, injector(s}, MAP sensor, TP sensor, ECT sensor, EVAP system, ECM
P1314	Misfire/catalyst damage – bank 2	Engine mechanical fault, wiring, ignition/fuel system, injector(s), MAP sensor, TP sensor, ECT sensor, EVAP system, ECM
P1315	Persistent misfire	Other trouble code(s) stored (P0301-P0306)
P1316	Misfire	Wiring, other trouble code(s) stored, ignition/ fuel system, MAP sensor, TP sensor, ECT sensor, IAT sensor, injector(s}, ECM
P1317	Antilock brake system (ABS)- rough road signal, low	Circuit malfunction
P1318	Antilock brake system (ABS) – rough road signal, high	Circuit malfunction
P1319	Misfire detected with low fuel level	Low fuel level
P1327	Knock sensor (KS) 2 – low input	Wiring, KS incorrectly tightened, KS
P1328	Knock sensor (KS) 2 – high input	Wiring, KS incorrectly tightened, KS
P1332	Knock sensor (KS) 2, bank 2 – low input	Wiring, KS incorrectly tightened, KS
P1333	Knock sensor (KS) 2, bank 2 – high input	Wiring, KS incorrectly tightened, KS
P1346	Fuel tank level sensor B – circuit malfunction	Fuel tank level sensor, other trouble codes stored
P1351	Ignition diagnostic module -circuit malfunction	Wiring, ignition system, ECM
P1352	Ignition coil A, primary – circuit malfunction	Wiring, ignition coil, ECM
P1353	Ignition coil B, primary – circuit malfunction	Wiring, ignition coil, ECM
P1356	Ignition pick-up signal – circuit malfunction	Wiring, ignition system, ECM
P1357	Ignition diagnostic module	Wiring, ignition system, ECM
P1358	Ignition diagnostic module – range/ performance problem	Wiring, ignition system, ECM
P1359	Spark advance signal – circuit malfunction	Wiring, ignition system, ECM
P1360	Ignition coil A, secondary – circuit malfunction	Wiring, ignition coil, ECM
P1361	Ignition coil 8, secondary – circuit malfunction	Wiring, ignition coil, ECM
P1362	Ignition coil C, secondary- circuit malfunction	Wiring, ignition coil, ECM
P1363	Ignition coil, cylinder 3 – no activation	Wiring, ignition coil, engine control relay, ECM
P1364	Ignition coil, primary – circuit malfunction	Wiring, ignition coil, ECM
P1365	Ignition coil, secondary – circuit malfunction	Wiring, ignition coil, ECM
P1367	Ignition system – circuit malfunction	Wiring, ignition coil
P1368	Ignition system – circuit malfunction	Wiring, ignition coil
P1371	Ignition coil, cylinder 1 – early activation	Wiring, ignition coil, engine control relay, ECM
P1372	Ignition coil, cylinder 2 – early activation	Wiring, ignition coil, engine control relay, ECM
P1373	Ignition coil, cylinder 3 – early activation	Wiring, ignition coil, engine control relay, ECM
P1374	Ignition coil, cylinder 4 – early activation	Wiring, ignition coil, engine control relay, ECM
P1380	Camshaft position (CMP) actuator- circuit malfunction	Wiring, CMP actuator, ECM
P1381	Camshaft position (CMP) actuator – timing over advanced	Valve timing, engine mechanical fault, CMP actuator
P1383	Camshaft position (CMP) actuator- timing over retarded	Valve timing, engine mechanical fault, CMP actuator
P1400	Exhaust gas pressure sensor – voltage low	Wiring short to ground, exhaust gas pressure sensor, ECM
P1401	Exhaust gas pressure sensor – voltage high	Wiring short to positive, exhaust gas pressure sensor, ECM
P1402	Exhaust gas recirculation (EGR) system	Wiring short to ground, EGR valve, ECM
P1403	Pressure transducer – hoses transposed	Hose blocked/missing/transposed, mechanical fault, pressure transducer
P1404	Pressure transducer – metering orifice restricted	Hose leak/blockage, mechanical fault, pressure transducer
P1407	Exhaust gas recirculation (EGR) system – no flow detected	Hose leak/blockage, wiring, EGR valve, EGR solenoid, ECM
P1408	Exhaust gas recirculation (EGR) system – incorrect flow detected	Hose leak/blockage, wiring, EGR valve, EGR solenoid, ECM
P1409	Electronic vacuum regulator	Wiring, EGR valve, EGR solenoid, ECM
P1412	Secondary air injection (AIR) system, bank 1 – malfunction	Wiring, control valve, air pump, ECM
P1413	Secondary air injection (AIR) system, bank 1 – control valve open	Wiring, control valve, ECM
P1414	Secondary air injection (AIR) system, bank 1 – low flow	Wiring, control valve, air pump, ECM
P1415	Secondary air injection (AIR) system, bank 2 – malfunction	Wiring, control valve, air pump, ECM
P1416	Secondary air injection (AIR) system, bank 2 – control valve open	Wiring, control valve, ECM
P1417	Secondary air injection (AIR) system, bank 2 – low flow	Wiring, control valve, air pump, ECM
P1440	Evaporative emission (EVAP) canister purge valve – circuit open	Wiring, EVAP canister purge valve, ECM
P1441	Evaporative emission (EVAP) canister purge valve	Wiring, EVAP canister purge valve, hose connection(s)
P1442	Evaporative emission (EVAP) system – leak detected	Hose connection(s), intake leak, EVAP
P1442	Evaporative emission (EVAP) system – leak detected	canister, EVAP canister purge valve
P1443	Evaporative emission (EVAP) system – circuit malfunction	Wiring, EVAP canister purge valve, ECM
P1450	Evaporative emission (EVAP) pressure pump – circuit plausibility	Wiring, pressure pump, ECM
P1451	Evaporative emission (EVAP) pressure pump – circuit high	Wiring, pressure pump, ECM
P1452	Evaporative emission (EVAP) pressure pump – low current	Wiring, pressure pump, ECM
P1453	Evaporative emission (EVAP) pressure pump – high current	Wiring, pressure pump, ECM
P145C	Cooling fan module – temperature fault	Information only, no action needed
P145D	Cooling fan module – high temperature indication	Information only, no action needed
P1461	AJC refrigerant pressure sensor – low input	A/C refrigerant pressure too low (incorrectly charged), wiring, A/C refrigerant pressure sensor, ECM
P1462	AJC refrigerant pressure sensor – high input	A/C refrigerant pressure too high (cooling fault/incorrectly charged), wiring, A/C refrigerant pressure sensor, ECM
P1463	AJC refrigerant pressure sensor	Wiring, A/C refrigerant pressure sensor, ECM
P1465	Air conditioning – relay	Wiring, A/C relay
P1469	Air conditioning – low cycling period of AJC compressor	Wiring, A/C system
P1500	Vehicle speed sensor (VSS)	Wiring, VSS, ECM
P1504	Idle air control (lAC)	Wiring, lAC valve, ECM
P1505	Idle air control (lAC)	Wiring, lAC valve, ECM
P1506	Idle air control (lAC) – value high	Wiring short to positive, lAC valve, ECM
P1507	Idle air control (lAC) – value low	Wiring short to ground, lAC valve, ECM
P1508	Idle air control {lAC) valve -circuit malfunction	Wiring open circuit, lAC valve, ECM
P1509	Idle air control (lAC) valve opening coil – malfunction	Wiring, lAC valve
P1510	Idle air control (lAC) valve opening coil -circuit malfunction	Wiring, lAC valve
P1512	Intake manifold air control system, bank 1 – valve stuck closed	Wiring, intake manifold air control system, mechanical fault
P1513 0	Idle air control (lAC) valve opening coil -circuit low	Wiring short circuit to ground, lAC valve
P1513 f)	Intake manifold air control system, bank 2 – valve stuck closed	Wiring, intake manifold air control system, mechanical fault
P1514	Idle air control (lAC) valve opening coil -circuit high	Wiring short circuit to positive, lAC valve
P1516	Intake manifold air control system	Wiring, intake manifold air control system, mechanical fault
P1517	Park/neutral position (PNP) switch – cranking neutral/drive	Wiring, PNP switch
P1518	Intake manifold air control system – valve stuck open	Wiring, intake manifold air control system, mechanical fault
P1519	Intake manifold air control system – valve stuck closed	Wiring, intake manifold air control system, mechanical fault
P151B	Idle speed control (ISC) – rpm low	Engine stall, information only, no action needed
P151C	Idle speed control (ISC) – rpm high	High engine speed, information only, no action needed
P1520	Intake manifold air control system – circuit malfunction	Wiring, intake manifold air control system
P1522	Engine control module (ECM)/ABS control module – communication malfunction	Wiring, connector, mechanical fault, ABS control module, ECM
P1535	A/C compressor request – malfunction	Wiring, A/C master switch, A/C control module
P1536	A/C compressor request – compressor relay, open circuit	Wiring, compressor relay
P1537 0	A/C compressor request – compressor relay, short circuit to ground	Wiring, compressor relay
P1537 f)	Intake manifold air control system, bank 1 – valve stuck open	Wiring, intake manifold air control system, mechanical fault
P1538 0	AIC compressor request – compressor relay, short circuit to positive	Wiring, compressor relay
P1538 f)	Intake manifold air control system, bank 2 – valve stuck open	Wiring, intake manifold air control system, mechanical fault
P1550 D	Idle air control (lAC) valve closing coil – malfunction	Wiring, lAC valve
P1550 f)	Power steering pressure (PSP) switch	Wiring, PS system, PSP switch, ECM
P1551	Idle air control (lAC) valve closing coil – circuit malfunction	Wiring, lAC valve
P1552	Idle air control (lAC) valve closing coil – circuit low	Wiring open circuit/short to ground, lAC valve
P1553	Idle air control (lAC) valve closing coil -circuit high	Wiring open circuit/short to positive, lAC valve
P1572	Brake pedal position (BPP) switch – circuit malfunction	ABS module, Controller area network (CAN), other trouble codes stored
P1590	Antilock brake system (ABS) rough road signal – error message from ABS control unit	Wiring, ABS system
P1591	Antilock brake system (ASS) rough road signal – open/short circuit to ground	Wiring, ABS system
P1592	Antilock brake system (ASS) rough road signal – open/short circuit to positive	Wiring, ABS system
P1605	Power interuption in KAM	Wiring, battery terminal corrosion, loose battery connection, ECM
P1607	Engine control module (ECM) – MIL circuit	Wiring short circuit, engine malfunction indicator lamp (MIL), ECM
P1608	Engine control module (ECM) – MIL circuit	Open circuit, engine malfunction indicator lamp (MIL), ECM
P1614	Engine coolant thermostat – circuit malfunction	Wiring, engine coolant thermostat
P1615	Engine coolant thermostat, circuit low – circuit malfunction	Wiring, engine coolant thermostat
P1616	Engine coolant thermostat, circuit high -circuit malfunction	Wiring, engine coolant thermostat
P1619	Engine control module (ECM) internal reference voltage – malfunction	ECM
P1620	Engine control module (ECM) – programming incomplete	ECM
P1621	Immobilizer control module	Communication error
P1622	Engine control module (ECM) – coding	Incorrectly coded
P1623	Engine control module (ECM)	Immobilizer – circuit malfunction
P1624	Engine control module (ECM) – malfunction	ECM
P1641	Fuel pump (FP) – failure	FP, fuel pipe blockage, mechanical fault
P1642	Fuel pump (FP)- voltage high	Wiring short to positive, relay, FP
P1643	Fuel pump (FP) – voltage low	Wiring short to ground, relay, FP
P1644	Fuel pump (FP)- pump speed control	–
P1645	Fuel pump (FP)	FP, fuel pressure regulator, fuel pipe blockage, mechanical fault
P1650	Power steering pressure (PSP) switch	Wiring, PSP switch, ECM
P1651	Power steering pressure (PSP) switch – circuit malfunction	Wiring, PSP switch, ECM
P1659	Traction control monitoring 2/3, torque calculator error – malfunction	ECM trouble code(s) stored, ECM
P1663	Throttle angle/torque signal – ABS/HDC wiring open circuit	Wiring, ABS system, HOC system
P1664	Throttle angle/torque signal – ABS/HDC wiring short to ground	Wiring, ABS system, HOC system
P1665	Throttle angle/torque signal – ABS/HDC wiring short to positive	Wiring, ABS system, HOC system
P1666	Immobilizer signal – CAN data bus	Wiring, immobilizer control module
P1667	Immobilizer signal – CAN data bus	Wiring short circuit to ground
P1668	Immobilizer signal – CAN data bus	Wiring open circuit
P1669	Engine control module (ECM) cooling fan – circuit malfunction	Wiring, cooling fan relay, cooling fan motor
P1670	Engine control module (ECM) cooling fan – circuit low	Wiring short circuit to ground, cooling fan motor
P1671	Engine control module (ECM) cooling fan – circuit high	Wiring open circuit, cooling fan motor
P1672	Immobilizer signal – incorrect code	Incorrect key, immobilizer control module
P1673	Immobilizer signal	ECM not configured
P1674	Immobilizer signal – no valid code received	Incorrect key, wiring, immobilizer control module
P1675	Condenser fan – circuit malfunction	Wiring open/short circuit, condenser fan relay
P1693	Immobilizer signal	ECM not configured
P169F	Engine control module (ECM) – unused fault code	Signal invalid, information only, no action needed
P1700	Transfer box – low range signal implausible	Wiring, transmission mode selection switch, transfer box
P1701 0	Transfer box – fault signal	Wiring, transfer box
P1701 fJ	Reverse gear selection – malfunction	Wiring, transmission range (TR) sensor, transmission range (TR) switch, PNP switch, shift solenoid (SS), transmission mechanical fault, ECM/TCM
P1702	Transfer box signal line – communication error	Wiring, ECM
P1703 0	Transfer box link – signal line	Wiring open circuit/short to positive
P1703 fJ	Brake pedal position (BPP) switch – range/ performance problem	Wiring, BPP switch, ECM
P1704	Digital transmission selector	Wiring, digital transmission selector, ECM/TCM
P1705	High vehicle speed observed in park	Wiring, digital transmission selector/ transmission range (TR) switch, transmission range (TR) sensor, PNP switch, V55, ECM/TCM
P1708	Transfer box link – signal line	Wiring short circuit to ground
P1711	Transmission fluid temperature (TFT) – range/ performance problem	Wiring, TFT sensor, ECM/TCM
P1713	Transmission fluid temperature (TFT) – value low	Wiring short to ground, TFT sensor, ECM/TCM
P1714	Shift solenoid (SS) 1 -defective	Wiring, 55, ECM/TCM
P1715	Shift solenoid (SS) 2 – defective	Wiring, 55, ECM/TCM
P1716	Shift solenoid (SS) 3 – defective	Wiring, 55, ECM/TCM
P1717	Coast clutch solenoid (CCS) – defective	Wiring, CC5, ECM/TCM
P1718	Transmission fluid temperature (TFT) – value high	Wiring short to positive, TFT sensor, ECM/TCM
P1728	Transmission component slipping	Torque converter clutch (TCC)
P1729	Transmission mode selection switch 4x4L – circuit malfunction	Wiriflg, transmission mode selection switch, ECM/TCM
P1740	Torque converter clutch (TCC)	Wiring, TCC solenoid, ECM/TCM
P1741	Torque converter clutch (TCC)	Wiring, TCC solenoid, ECM/TCM
P1742	Torque converter clutch (TCC)	Wiring, TCC solenoid, ECM/TCM
P1744	Torque converter clutch (TCC)	Wiring, TCC solenoid, ECM/TCM
P1745	Transmission fluid pressure (TFP) solenoid	Wiring, TFP solenoid, ECM/TCM
P1746	Transmission fluid pressure (TFP) solenoid – solenoid open	Wiring, TFP solenoid, ECM/TCM
P1747	Transmission fluid pressure (TFP) solenoid – solenoid closed	Wiring, TFP solenoid, ECM/TCM
P1749	Transmission fluid pressure (TFP) solenoid – low pressure	Wiring, TFP solenoid, ECM/TCM
P1750	Transmission fluid pressure (TFP) – maximum control limit reached	Wiring, TFP solenoid, transmission, ECM/TCM
P1751	Shift solenoid (SS) 1 – defective	Wiring, 55, ECM/TCM
P1752	Transmission fluid pressure (TFP), 1st gear- maximum control limit reached	Wiring, TFP solenoid, transmission, ECM/TCM
P1753	Transmission fluid pressure (TFP), 2nd gear- maximum control limit reached	Wiring, TFP solenoid, transmission, ECM/TCM
P1754	Coast clutch solenoid (CCS) – circuit malfunction	Wiring, CC5, ECM/TCM
P1755	Transmission fluid pressure (TFP), 3rd gear – maximum control limit reached	Wiring, TFP solenoid, transmission, ECM/TCM
P1756	Shift solenoid (SS) 2 -defective	Wiring, 55, ECM/TCM
P1757	Transmission fluid pressure (TFP), 4th gear- maximum control limit reached	Wiring, TFP solenoid, transmission, ECMfTCM
P1758	Transmission fluid pressure (TFP) – maximum control limit reached	Wiring, TFP solenoid, transmission, ECMfTCM
P1759	Transmission fluid pressure (TFP) – maximum control limit reached	Wiring, TFP solenoid, transmission, ECMfTCM
P1760	Transmission fluid pressure (TFP) solenoid – short circuit	Wiring, TFP solenoid, ECMfTCM
P1761	Shift solenoid (SS) 3 – defective	Wiring, SS, ECMfTCM
P1765	Injection timing	–
P1766	Coast clutch solenoid (CCS) – defective	Wiring, CCS, ECMfTCM
P1767	Torque converter clutch (TCC)	Wiring, TCC, TCM
P1768	Economy/sport mode switch, winter weather	Wiring, economy/sport mode switch, TCM
P1769	Torque modulation circuit	–
P1775	Engine control module (ECM) – TCM signa!	Wiring, ECM
P1776	Transmission control system -torque interface malfunction	Wiring, ECMfTCM
P1777	Engine control module (ECM) – TCM retard signal	Wiring, ECM
P1779	Transmission warning lamp	Wiring, poor connection, transmission warning lamp, ECMfTCM
P1780	Transmission mode selection switch – 0/D Cancel	Wiring, digital transmission selector/ transmission mode selection switch/PNP switch, ECMfTCM
P1781	Transmission mode selection switch 4×4 – circuit out of self-test range	Wiring, operator error, digital transmission selector/transmission mode selection switch/PNP switch, ECMfTCM
P1783	Transmission over temperature condition	Transmission fluid level low, transmission mechanical fault, TFT sensor, TCM
P1784	Transmission – mechanical fault	Transmission mechanical fault
P1785	Transmission – mechanical fault	Transmission mechanical fault
P1788	Torque converter clutch (TCC) solenoid -open circuit ·	Wiring, TCC solenoid, ECMfTCM
P1789	Torque converter clutch (TCC) solenoid – closed circuit	Wiring, TCC solenoid, ECMfTCM
P1792	Barometric pressure (BARO) sensor	Wiring, BARO sensor, ECM
P1795	Battery voltage	Wiring, poor connection, battery, alternator