All Isuzu Fault Codes
88 Isuzu diesel fault codes. Click any code for causes, diagnostics, severity, and common fixes.
ISUZU-C1025 serious
ABS Hydraulic Control Unit Valve Relay
ISUZU-C1035 serious
ABS Solenoid Valve Circuit - Front Left
ISUZU-P0087 serious
Fuel Rail / System Pressure Too Low
ISUZU-P0088 serious
Fuel Rail / System Pressure Too High
ISUZU-P0089 serious
Fuel Pressure Regulator Performance
ISUZU-P0093 serious
Fuel System Leak Detected - Large Leak
ISUZU-P0191 serious
Fuel Rail Pressure Sensor Range/Performance
ISUZU-P0192 serious
Fuel Rail Pressure Sensor Circuit Low
ISUZU-P0193 serious
Fuel Rail Pressure Sensor Circuit High
ISUZU-P0234 serious
Turbo/Super Charger Overboost Condition
ISUZU-P0251 serious
Injection Pump Fuel Metering Control 'A' Malfunction
ISUZU-P0252 serious
Injection Pump Fuel Metering Control 'A' Range/Performance
ISUZU-P0299 serious
Turbo/Super Charger Underboost
ISUZU-P0335 serious
Crankshaft Position Sensor Circuit
ISUZU-P0340 serious
Camshaft Position Sensor Circuit
ISUZU-P0420 serious
Catalyst System Efficiency Below Threshold (DOC)
ISUZU-P042E serious
EGR Valve Stuck Open — definition not reliably documented
ISUZU-P132B serious
Turbocharger Boost Control A Performance — definition not reliably documented
ISUZU-P2002 serious
Particulate Trap Efficiency Below Threshold
ISUZU-P2003 serious
Particulate Trap Efficiency Below Threshold
ISUZU-P203F serious
Reductant Level Low — definition not reliably documented
ISUZU-P2047 serious
Reductant Injector Circuit/Open
ISUZU-P2048 serious
Reductant Injector Circuit Low
ISUZU-P2049 serious
Reductant Injector Circuit High
ISUZU-P204F serious
Reductant System Performance — definition not reliably documented
ISUZU-P207F serious
Reductant Quality Performance
ISUZU-P20E8 serious
Reductant Pressure Too Low
ISUZU-P20EE serious
Diesel Exhaust Fluid (DEF) System NOx Trap Low Efficiency
ISUZU-P229F serious
NOx Sensor Bank 1 Sensor 2 Range/Performance
ISUZU-P242F serious
DPF Ash Load at Limit - Service Required — definition not reliably documented
ISUZU-P244B serious
DPF Differential Pressure Too High — definition not reliably documented
ISUZU-P2458 serious
DPF Regen Duration — definition not reliably documented
ISUZU-P2463 serious
Diesel Particulate Filter Restriction - Soot Accumulation
ISUZU-U0100 serious
Lost Communication with ECM/PCM
ISUZU-U0101 serious
Lost Communication with TCM (Aisin / GM trans)
ISUZU-C1001 moderate
Right Front Wheel Speed Sensor Circuit
ISUZU-C1002 moderate
Right Front Wheel Speed Sensor Signal Erratic
ISUZU-C1003 moderate
Left Front Wheel Speed Sensor Circuit
ISUZU-C1004 moderate
Left Front Wheel Speed Sensor Signal Erratic
ISUZU-C1005 moderate
Right Rear Wheel Speed Sensor Circuit
ISUZU-C1006 moderate
Left Rear Wheel Speed Sensor Circuit
ISUZU-P0090 moderate
Fuel Pressure Regulator Control Circuit
ISUZU-P0091 moderate
Fuel Pressure Regulator 1 Control Circuit Low
ISUZU-P0092 moderate
Fuel Pressure Regulator 1 Control Circuit High
ISUZU-P0094 moderate
Fuel System Leak Detected - Small Leak
ISUZU-P0101 moderate
MAF Sensor Circuit Range/Performance
ISUZU-P0102 moderate
MAF Sensor Circuit Low
ISUZU-P0103 moderate
MAF Sensor Circuit High
ISUZU-P0104 moderate
MAF Sensor Circuit Intermittent
ISUZU-P0105 moderate
MAP Sensor Circuit Malfunction
ISUZU-P0107 moderate
MAP Sensor Circuit Low
ISUZU-P0108 moderate
MAP Sensor Circuit High
ISUZU-P0253 moderate
Injection Pump Fuel Metering Control 'A' Low
ISUZU-P0254 moderate
Injection Pump Fuel Metering Control 'A' High
ISUZU-P0401 moderate
Exhaust Gas Recirculation Flow Insufficient Detected
ISUZU-P0402 moderate
Exhaust Gas Recirculation Flow Excessive Detected
ISUZU-P0403 moderate
Exhaust Gas Recirculation Control Circuit
ISUZU-P0404 moderate
Exhaust Gas Recirculation Control Circuit Range/Performance
ISUZU-P0405 moderate
Exhaust Gas Recirculation Sensor "A" Circuit Low
ISUZU-P0406 moderate
Exhaust Gas Recirculation Sensor "A" Circuit High
ISUZU-P0408 moderate
Exhaust Gas Recirculation Sensor "B" Circuit High
ISUZU-P040D moderate
EGR Temperature Sensor A Circuit Low — definition not reliably documented
ISUZU-P0421 moderate
Warm-Up Catalyst Efficiency Below Threshold
ISUZU-P0460 moderate
Fuel Level Sensor "A" Circuit
ISUZU-P0488 moderate
Exhaust Gas Recirculation Throttle Position Control Range/Performance
ISUZU-P0562 moderate
System Voltage Low
ISUZU-P0563 moderate
System Voltage High
ISUZU-P0628 moderate
Fuel Pump 'A' Control Circuit Low
ISUZU-P1093 moderate
Fuel Rail Pressure Low During Power Enrichment
ISUZU-P1261 moderate
Fuel Injection Pump Overload Protection
ISUZU-P205B moderate
Reductant Tank Temperature Sensor Circuit Range/Performance
ISUZU-P20E9 moderate
Reductant Pressure Too High — definition not reliably documented
ISUZU-P220B moderate
Manifold Absolute Pressure / NOx Sensor Correlation
ISUZU-P2227 moderate
Barometric Pressure Sensor A Range/Performance
ISUZU-P2228 moderate
Barometric Pressure Sensor A Circuit Low
ISUZU-P2229 moderate
Barometric Pressure Sensor A Circuit High
ISUZU-P244A moderate
DPF Differential Pressure Too Low — definition not reliably documented
ISUZU-P2453 moderate
DPF Pressure Sensor Range/Performance — definition not reliably documented
ISUZU-P2454 moderate
DPF Pressure Sensor Low — definition not reliably documented
ISUZU-P2455 moderate
DPF Pressure Sensor High — definition not reliably documented
ISUZU-P2459 moderate
DPF Regen Frequency — definition not reliably documented
ISUZU-U0121 moderate
Lost Communication with ABS Control Module
ISUZU-C1099 minor
ABS Warning Lamp Circuit
ISUZU-P0112 minor
Intake Air Temp Sensor Low
ISUZU-P0113 minor
Intake Air Temp Sensor High
ISUZU-P0461 minor
Fuel Level Sensor Circuit Range/Performance
ISUZU-P0462 minor
Fuel Level Sensor Circuit Low
ISUZU-P0463 minor
Fuel Level Sensor Circuit High