Dodge Ram Truck 5.9L Turbo Diesel (1998) Trouble Code Info

Model Year Engine identification System
Ram Truck 5.9L Turbo Diesel 1998 ETB JTEC

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.
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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 P type Fault location Probable cause
PO,P2,UO Refer to OBO-II trouble code tables
P1281 Engine temperature -low for long period Wiring, cooling system, coolant thermostat, EClsensor
P1388 Engine control relay Wiring open circuit/short circuit, engine control relay
P1389 Engine control relay Wiring open circuit, engine control relay
P1492 Ambient/battery temperature sensor -voltage high Wiring, ambient/battery temperature sensor, ECM
P1493 Ambient/battery temperature sensor -voltage low Wiring, ambient/battery temperature sensor, ECM
P1496 Engine control module (ECM) -5 volt output low ECM
P1594 Alternator -voltage high Wiring, battery, alternator
P1595 Cruise control Wiring open circuit/short circuit, hoses, cruise control master switch, cruise control vacuum switching valve
P1596 Cruise control master switch -high voltage Wiring, cruise control master switch
P1597 Cruise control master switch -low voltage Wiring, cruise control master switch
P1693 Engine control module (ECM) Companion module trouble code detected in ECM
P1694 CAN data bus, engine control module (ECM) no signal Wiring, ECM
P1696 Engine control module (ECM) -EEPROM error ECM
P1756 Governor pressure not equal to target (15-20 PSI) -mid pressure malfunction Signal wire open circuit/short circuit, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM no 5 volt supply
P1757 Governor pressure not equal to target -low pressure malfunction Signal wire open circuit/short circuit, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM no 5 volt supply
P1762 Governor pressure sensor -incorrect signal Signal wire short circuit to ground/positive, supply wire open circuit/short circuit, transmission fluid level, governor pressure solenoid, governor pressure sensor, ECM
P1763 Governor pressure sensor -signal high Signal wire short circuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
P1764 Governor pressure sensor -signal low Signal wire short circuit to ground, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
P1765 Transmission system relay Wiring open circuit/short circuit, transmission system relay, ECM
P1899 Park/neutral position (PNP) switch -input circuit malfunction Wiring, PNP switch, ECM
 
Scan code Hex type Fault location Probable cause
0 DTC error
2 Engine control module (ECM) -internal fault ECM
5 Alternator -voltage low Wiring, battery, alternator drive belt, alternator
6 Alternator -voltage high Wiring, battery, alternator
OA Engine control relay Wiring open circuit/short circuit, engine control relay
8 Alternator, field control -circuit malfunction Wiring open circuit/short circuit, alternator, battery
OC Torque converter clutch (TCC) solenoid electrical Wiring open circuit/short circuit, TCC solenoid
OF Cruise control Wiring open circuit/short circuit, hoses, voltage low/high, cruise control master switch, cruise control vacuum switching valve
10 AlC compressor clutch relay Wiring open circuit/short circuit, AlC compressor clutch relay
11 Exhaust gas recirculation (EGR) -circuit malfunction Wiring, EGR solenoid, EGR control module, ECM
12 Evaporative emission (EVAP) canister purge valve -circuit malfunction Wiring open circuit/short circuit, EVAP canister purge valve
13 Injector 3 -circuit malfunction Wiring, injector
14 Injector 2 -circuit malfunction Wiring, injector
15 Injector 1 -circuit malfunction Wiring, injector
19 Idle speed control (ISC) system -malfunction Wiring open circuit/short circuit, lAC valve
1A Throttle position (TP) sensor -low input Wiring short circuit to ground, TP sensor
18 Throttle position (TP) sensor -high input Wiring short circuit to positive, TP sensor
1E Engine coolant temperature (ECT) sensor low input Coolant thermostat, wiring short circuit to ground, ECT sensor
1F Engine coolant temperature (ECT) sensor high input Coolant thermostat, wiring open circuit/ shortcircuit to positive, ground wire defective, ECT sensor
21 Engine temperature -low for long period Wiring, cooling system, coolant thermostat, ECTsensor
24 Manifold absolute pressure (MAP) sensor low input Wiring short circuit to ground, MAP sensor
25 Manifold absolute pressure (MAP) sensor high input Wiring short circuit to positive, MAP sensor
27 Manifold absolute pressure (MAP) sensor Wiring, hose connection(s), MAP sensor
28 Crankshaft position (CKP) sensor no signal Wiring, air gap, CKP sensor
29 Ignition coil C, primary -circuit malfunction Wiring, ignition coil, ECM
2A Ignition coil S, primary -circuit malfunction Wiring, ignition coil, ECM
28 Ignition coil A, primary -circuit malfunction Wiring, ignition coil
2C Engine control relay Wiring open circuit, engine control relay
31 Engine control module (ECM) -EEPROM error ECM
32 Shift solenoid (SS) 3-4 -electrical Wiring, SS, ECM
37 Injector 9 -circuit malfunction Wiring, injector
38 Injector 10 circuit malfunction Wiring, injector
39 Intake air temperature (IAT) sensor -low input Wiring short circuit to ground, IAT sensor
3A Intake air temperature (IAT) sensor -high input Wiring open circuit/short circuit to positive, ground wire defective, IAT sensor
3D Injector 4 -circuit malfunction Wiring, injector
3E Heated oxygen sensor (H02S) 1, bank 1 high voltage Wiring short circuit to positive, fuel pressure,injector control, EVAP canister purge valve, air filter blocked, H02S
41 Heated oxygen sensor (H02S) 1, bank 2 no activity detected Wiring open circuit, heating inoperative, H02S
42 Heated oxygen sensor (H02S) 1, bank 2 high voltage Wiring short circuit to positive, fuel pressure, injector control, EVAP canister purge valve, air filter blocked, H02S
44 Engine control module (ECM) -internal fault ECM
45 Injector 5 -circuit malfunction Wiring, injector
46 Injector 6 -circuit malfunction Wiring, injector
4A Transmission fluid temperature (TFT) sensor low input Wiring short circuit to ground, TFT sensor, ECM
4B Transmission fluid temperature (TFT) sensor highinput Wiring short circuit to positive, TFT sensor, ECM
4C Ignition coil D, primary -circuit malfunction Wiring, ignition coil, ECM
40 Ignition coil E, primary -circuit malfunction Wiring, ignition coil, ECM
4F Injector 7 -circuit malfunction Wiring, injector
50 Injector 8 -circuit malfunction Wiring, injector
52 Cruise control Wiring, cruise control vacuum switching valve
56 Cruise control master switch -high voltage Wiring, cruise control master switch
57 Cruise control master switch -low voltage Wiring, cruise control master switch
65 Fuel pump relay Wiring open circuit/short circuit, fuel pump relay
66 Heated oxygen sensor (H02S) 1, bank 1 slow response Heating inoperative, wiring, H02S
67 Heated oxygen sensor (H02S) 1, bank 1 heater control -circuit malfunction Wiring, H02S
68 Heated oxygen sensor (H02S) 2, bank 1 slow response Heating inoperative, wiring, exhaust leak, H02S
69 Heated oxygen sensor (H02S) 2, bank 1, heater control -circuit malfunction Wiring, H02S
6A Random/multiple cylinder(s) -misfire detected Wiring, spark plug(s), HT lead(s), injector(s),ignition coil(s), low compression
6B Cylinder 1 -misfire detected Wiring, engine mechanical fault, ignition/fuel system, injector
6C Cylinder 2 -misfire detected Wiring, engine mechanical fault, ignition/fuelsystem, injector
60 Cylinder 3 -misfire detected Wiring, engine mechanical fault, ignition/fuel system, injector
6E Cylinder 4 -misfire detected Wiring, engine mechanical fault, ignition/fuelsystem, injector
70 Catalytic converter system, bank 1 -efficiency below threshold Catalytic converter, wiring, H02S 2
71 Evaporative emission (EVAP) system incorrectflow detected Hose connection(s), intake leak, EVAP canister purge valve
72 Park/neutral position (PNP) switch -input circuit malfunction Wiring, PNP switch, ECM
73 Power steering pressure (PSP) switchrange/performance problem Wiring, PS system, PSP switch
76 System too rich, bank 1 Wiring, intake blocked, EVAP canister purge valve,fuel pressure, EGR system, injector(s), air filter blocked, ignition system, H02S
77 System too lean, bank 1 Wiring, intake/exhaust leak, MAP sensor, fuel pressure/pump, EVAP canister purge valve, injector(s), H02S
78 System too rich, bank 2 Wiring, intake blocked, EVAP canister purge valve, fuel pressure, EGR system, injector(s), air filter blocked, ignition system, H02S
79 System too lean, bank 2 Wiring, intake/exhaust leak, MAP sensor, fuel pressure/pump, EVAP canister purge valve, injector(s), H02S
7A Heated oxygen sensor (H02S) 1, bank 2 slow response Heating inoperative, wiring, H02S
78 Heated oxygen sensor (H02S) 2, bank 2 slowresponse Heating inoperative, wiring, exhaust leak, H02S
7C Heated oxygen sensor(H02S) 1, bank 2, heater control -circuit malfunction Wiring, H02S, ECM
70 Heated oxygen sensor (H02S) 2, bank 2, heater control -circuit malfunction Wiring, H02S, ECM
7E Heated oxygen sensor (H02S) 2, bank 1 high voltage Wiring short circuit to positive, catalytic converter, H02S, ECM
7F Heated oxygen sensor (H02S) 2, bank 2 high voltage Wiring short circuit to positive, catalytic converter,H02S, ECM
80 Insufficient coolant temperature for closed loop fuel control Wiring, cooling system, coolant thermostat, .ECTsensor
84 Throttle pOSition (TP) sensor -range/ performance problem Wiring, accelerator cable adjustment, TP sensor
87 Manifold absolute pressure (MAP) sensor no 5volt supply Wiring, MAP sensor, ECM
8A Idle speed control (rSC) system -rpm lower/higher than expected Wiring, air leak, throttle valve tight/sticking, lAC valve
8C Exhaust gas recirculation (EGR) system -flow malfunction Hose leak/blockage, wiring, EGR valve, EGR solenoid, ECM
80 Governor pressure not equal to target (15-20 PSI) -mid pressure malfunction Signal wire open circuit/short circuit, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply
8E Govemor pressure not equal to target (15-20 PSI) -zero pressure malfunction Signal wire open circuit/short circuit, valve body, sensor supply wire open circuit, transmission fluid level, governor pressure solenoid, transmission mechanical fault, ECM -no 5 volt supply
94 Torque converter clutch (TCC) solenoid circuit malfunction Wiring, TCC solenoid
95 Fuel level sensor -low input Wiring open circuit, fuel level sensor
96 Fuel level sensor -high input Wiring short circuit to positive, fuel level sensor
97 Fuel level sensor -malfunction Wiring, fuel level sensor
99 Ambient/battery temperature sensor -voltage low Wiring, ambient/battery temperature sensor
9A Ambient/battery temperature sensor -voltage high Wiring, ambient/battery temperature sensor
98 Heated oxygen sensor (H02S) 1, bank 1 -lowvoltage Exhaust leak, wiring short circuit to ground, H02S
9C Heated oxygen sensor (H02S) 2, bank 1 -lowvoltage Exhaust leak, wiring short circuit to ground, H02S
90 Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -intermittent signal Wiring, poor connection, air gap, CKP sensor, CMP sensor
AO Evaporative emission (EVAP) system -small leak detected Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve
A1 Evaporative emission (EVAP) system -large leak detected Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve
A4 Transmission fluid temperature (TFT) sensor range/performance problem Wiring, TFT sensor
A5 Gear selection, 3-4 shift malfunction Wiring, TR sensor, shift solenoids, transmission mechanical fault
A6 Output shaft speed (OSS) sensor -circuit malfunction Wiring, OSS sensor, ECM
A7 Govemor pressure sensor -signal low Signal wire short circuit to ground, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
A8 Governor pressure sensor -signal high Signal wire short circuit to positive, supply wire open circuit, transmission fluid level, governor pressure sensor, ECM
A9 Governor pressure sensor -incorrect signal Signal wire short circuit to ground/positive, supply wire open circuit/short circuit, transmission fluid level, governor pressure solenoid, governor pressure sensor, ECM
AB Transmission fluid pressure (TFP) solenoid -electrical Wiring, TFP solenoid, ECM
AD Transmission system relay Wiring open circuit/short circuit, transmission system relay, ECM
AE Cylinder 5 -misfire detected Wiring, engine mechanical fault, ignition/fuel system, injector
AF Cylinder 6 -misfire detected Wiring, engine mechanical fault, ignition/fuelsystem, injector
BO Cylinder 7 -misfire detected Wiring, engine mechanical fault, ignition/fuel system, injector
B1 Cylinder 8 -misfire detected Wiring, engine mechanical fault, ignition/fuel system, injector
B2 Cylinder 9 -misfire detected Wiring, engine mechanical fault, ignition/fuel system, injector
B3 Cylinder 10 -misfire detected Wiring, engine mechanical fault, ignitionlfuel system, injector
B4 Catalytic converter system, bank 2 -efficiencybelow threshold Catalytic converter, wiring, H025 2
B5 Heated oxygen sensor (H02S) 1, bank 2 -lowvoltage Exhaust leak, wiring short to ground, H02S, ECM
B6 Heated oxygen sensor (H02S) 2, bank 2 -low voltage Exhaust leak, wiring short to ground, H02S, ECM
B7 Evaporative emission (EVAP) leak detection pump solenoid Wiring open circuit/short circuit, hose leak! blockage, EVAP leak detection pump solenoid
B8 Evaporative emission (EVAP) leak detectionpump -pressure switch Wiring, hose leak!blockage, EVAP leak detection pump
BA Engine control module (ECM) -misfire detection limit reached Wiring, poor connection, CKP sensor
BB Evaporative emission (EVAP) system blockage detected Hose connection(s), hose blocked/trapped, EVAP canister
Be Overdrive solenoid/switch -performance problem Wiring, overdrive solenoid/switch, transmission mechanical fault, ECM
BD Heated oxygen sensor (H02S) 3, bank 1, heater control -circuit malfunction Wiring, H02S, ECM
CO Heated oxygen sensor (H02S) 1, bank 1 slow response Heating inoperative, wiring, H02S
C1 Heated oxygen sensor (H02S) 1, bank 2 slow response Wiring, heating inoperative, exhaust leak, H02S
C2 Heated oxygen sensor (H02S) 2, bank 1 slow response Wiring, heating inoperative, exhaust leak, H025
DE CAN data bus, engine control module (ECM) no signal Wiring, ECM
OF Engine control module (ECM) Companion module trouble code detected in ECM