Isuzu N-Series 4HK1 Engine DTC Trouble Codes

SAE Code Detection Item Remarks
P0016 Crankshaft Position Sensor, Camshaft Position Sensor Correlation Related Error
P0027 Exhaust Brake Valve Stuck
Exhaust Throttle Valve Stuck
P003A Variable Geometry Turbo (VGT) Module Opening Command Too Wide
P0045 VGT Module Motor Circuit Short/Position Control Abnormality/Power Supply Voltage
P0079 Exhaust Throttle Short to GND
P0080 Exhaust Throttle Short to BATT
P0087 Rail Pressure Limiter Operation
P0088 Abnormal Rail Pressure Level 1
Abnormal Rail Pressure Level 2
P0091 SCV (+) Output Open/Short to GND

SCV (-) Output Open/Short to GND

SCV Coil Open

P0092 SCV (+) Output Short to BATT

SCV (-) Output Short to BATT

P0093 Fuel Leak or Rail Pressure Sensor Performance Abnormality
P0097 Intake Air Temperature Sensor 2 Signal Low Voltage Abnormality
P0098 Intake Air Temperature Sensor 2 Signal High Voltage Abnormality
P0101 Exhaust Gas Recirculation (EGR) System Abnormality
P0102 Mass Air Flow (MAF) Meter Signal Low Voltage Abnormality
P0103 MAF Meter Signal High Voltage Abnormality
P0112 Intake Air Temperature Sensor Signal Low Voltage Abnormality
P0113 Intake Air Temperature Sensor Signal High Voltage Abnormality
P0116 Coolant Temperature Sensor Performance
P0117 Coolant Temperature Sensor Signal Low Voltage Abnormality
P0118 Coolant Temperature Sensor Signal High Voltage Abnormality
P0126 Safe Driving Coolant Temperature Increase
P0128 Coolant Temperature Below Thermostat Regulating Temperature
P0181 Fuel Temperature Sensor Stuck in Middle Range
P0182 Fuel Temperature Sensor Signal Low Voltage Abnormality
P0183 Fuel Temperature Sensor Signal High Voltage Abnormality
P0191 Rail Pressure Sensor Stuck
Rail Pressure Sensor Characteristics Abnormality (When Key is ON)
Rail Pressure Sensor Characteristics Abnormality (When Key is OFF)
P0192 Rail Pressure Sensor Signal Low Voltage Abnormality
P0193 Rail Pressure Sensor Signal High Voltage Abnormality
P0201 Two-Way Valve (TWV) 1 Output Open Load

Injector #1 Coil Open

P0202 TWV 4 Output Open Load

Injector #6 Coil Open

P0203 TWV 2 Output Open Load

Injector #5 Coil Open

P0204 TWV 3 Output Open Load

Injector #3 Coil Open

P0219 Engine Overspeed Abnormality
P0234 Turbo/Super Charger Engine Overboost Abnormality
P0237 Manifold Absolute Pressure (MAP) Sensor Signal Low Voltage Abnormality
P0238 MAP Sensor Signal High Voltage Abnormality
P0261 TWV 1 Load Short (Injector #1)
P0264 TWV 4 Load Short (Injector #6)
P0267 TWV 2 Load Short (Injector #5)
P0270 TWV 3 Load Short (Injector #3)
P0299 Underboost Abnormality
P02E2 Electronic Control Throttle DC Motor Open Malfunction
P02E3 Electronic Control Throttle DC Motor +B/GND Short Malfunction
P02E7 Electronic Control Throttle Stuck Closed
Electronic Control Throttle Stuck Open
Electronic Control Throttle Open Learning Abnormality
Electronic Control Throttle Close Learning Abnormality
P02E8 Electronic Control Throttle Position Low-Side Abnormality
P02E9 Electronic Control Throttle Position Low-Side Abnormality
P0300 Engine Misfire (Multiple Cylinders)
P0301 Engine Misfire (Cylinder #1)
P0302 Engine Misfire (Cylinder #2)
P0303 Engine Misfire (Cylinder #3)
P0304 Engine Misfire (Cylinder #4)
P0335 No Crankshaft Position Sensor Pulse Input
P0336 Crankshaft Position Sensor Performance
P0340 No Camshaft Position Sensor Input
P0341 Camshaft Position Sensor Performance
P0381 Glow Indication Lamp Control Circuit High Side
Glow Indication Lamp Control Circuit Low Side
P0401 EGR Valve Stuck
P0402 EGR System Abnormality 3
P0403 EGR DC Motor Circuit Malfunction (EBM2)
EGR Duty Error
P0404 EGR in Open Position
P0405 EGR Gas Position Sensor Circuit Low
P0406 EGR Gas Position Sensor Circuit High
P040B EGR Gas Temperature Sensor Characteristics
P040C EGR Gas Temperature Sensor Low Voltage Abnormality
P040D EGR Gas Temperature Sensor High Voltage Abnormality
P041B EGR Gas Temperature Sensor 2 Characteristics
P041C EGR Gas Temperature Sensor 2 Low Voltage Abnormality
P041D EGR Gas Temperature Sensor 2 High Voltage Abnormality
P042E EGR Closed Position Performance
P0500 Vehicle Speed Sensor Circuit Abnormality
P0506 Idle Control Target Speed Low
P0507 Idle Control Target Speed High
P0512 Starter Switch Abnormality
P0522 Oil Pressure Sensor Low-Side Abnormality
P0523 Oil Pressure Sensor High-Side Abnormality
P0545 Low Exhaust Gas Temperature Abnormality Before OC
P0546 High Exhaust Gas Temperature Abnormality Before OC
P0562 Ignition 1 Low Voltage Abnormality
P0563 Ignition 1 High Voltage Abnormality
P0567 Cruise Resume/Accelerator Position Signal Malfunction
P0568 Cruise Set/Coast Set Signal Malfunction
P0571 Cruise/Brake Switch Circuit Malfunction
P0606 Engine ECU Main CPU Abnormality
P062F Electronically Erasable and Programmable Read Only Memory (EEPROM) Write Error
P0642 Analog Sensor Voltage Output #1 Low Voltage Abnormality
P0643 Analog Sensor Voltage Output #1 High Voltage Abnormality
P064C Glow Plug Control Module (GPCM) Circuit
GPCM Internal Abnormality
GPCM EEPROM Abnormality
MIL Control Circuit Low Side
P0652 Analog Sensor Voltage Output #2 Low Voltage Abnormality
P0653 Analog Sensor Voltage Output #2 High Voltage Abnormality
P0671 Cylinder 1 Glow Plug Circuit
P0672 Cylinder 2 Glow Plug Circuit
P0673 Cylinder 3 Glow Plug Circu
P0674 Cylinder 4 Glow Plug Circuit
P0687 Main Relay Abnormality
P0700 Transmission Control Module (TCM) MIL Illuminate Request
P0802 TCM MIL Illuminate Request Circuit
P1085 Rail Pressure Abnormality (Pump Reliability)
P1093 Rail Pressure Insufficient at High Load
P1125 Accelerator Pedal Position Sensor Circuit Intermittent
P1259 Single-Side Pumping
P1293 Capacity Charge-Up Abnormal Condition Flag 1
Capacity Charge-Up Abnormal Condition Flag 2
P1471 Diesel Particulate Filter (DPF) Regeneration Deficiency DPF
P160B Q Data/QR Data Cross Check Error DPF
P2002 DPF Deterioration 2 DPF
P2032 Exhaust Gas Low Temperature Abnormality Before DPF DPF
P2033 Exhaust Gas High Temperature Abnormality Before DPF DPF
P2080 Exhaust Gas Temperature Sensor High Temperature Abnormality Before Oxidation Catalyst (OC) DPF
Exhaust Gas Temperature Sensor Low Temperature Abnormality Before OC DPF
P2084 Exhaust Gas Temperature Sensor High Temperature Abnormality Before DPF DPF
P20E2 Exhaust Gas Temperature Sensor Abnormality
P2122 Accelerator Position Sensor 1 Circuit Low Voltage Abnormality
P2123 Accelerator Position Sensor 1 Circuit High Voltage Abnormality
P2127 Accelerator Position Sensor 2 Circuit Low Voltage Abnormality
P2128 Accelerator Position Sensor 2 Circuit High Voltage Abnormality
P2138 Accelerator Position Sensor 1, 2 Correlation Abnormality
P2146 COM 1 Output Open Load TWV 1 or 3 Output Open Load
P2147 COM 1 Output Short to GND TWV 1 or 3 (or 5) Output Short to GND
P2148 COM 1 Output Short to BATT TWV 1 or 3 (or 5) Output Short to BATT
P2149 COM 2 Output Open Load TWV 2 or 4 Output Open Load
P2150 COM 2 Output Short to GND TWV 2 or 4 (or 6) Output Short to GND
P2199 Intake Air Temperature Abnormality
P2227 Atmospheric Pressure (BARO) Sensor Performance
P2228 Atmospheric Pressure Sensor Signal Low Voltage Abnormality
P2229 Atmospheric Pressure Sensor Signal High Voltage Abnormality
P244B DPF Particulate Matter (PM) Over-Trapping DPF
P244C DPF Deterioration DPF
P2453 DPF Exhaust Pressure Characteristics Abnormality DPF
DPF Exhaust Pressure Characteristics
P2454 Exhaust Gas Pressure Sensor Low-Side Abnormality
P2455 Exhaust Gas Pressure Sensor High-Side Abnormality
P2457 EGR Cooler Abnormality
P2463 DPF Over-Accumulation DPF
P254D Power Take Off (PTO) Accelerator Pedal Sensor Signal High Voltage Abnormality
P2564 Variable Geometry Turbo (VGT) Hall IC Sensor Low
P2565 VGT Hall IC Sensor High
P256C Idle Air Control Valve Control Circuit Low Voltage
P256D Idle Air Control Valve Control Circuit High Voltage
P268A QR-Code Data Programming Abnormality
U0073 CAN Bus Abnormality
U0101 TCM CAN Communication Abnormality AT/MT
U0106 Glow Plug Control Module (GPCM) Failure
U010C VGT Module Failure
U0294 Driving Record Module (DRM) Abnormality