GM Duramax Diesel Fault Codes
57 GM Duramax diagnostic pages, grouped by the system the code belongs to. Each page covers symptoms, the tests to run in order, tools needed, and realistic parts and labor cost ranges.
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Aftertreatment (9)
- P-Code P20B9 — Reductant Temperature
- P-Code P20EE — SCR NOx Catalyst
- P-Code P24A4 — DPF Restriction - Forced Regeneration Limit Reached
- P-Code P203F — Reductant System Performance
- P-Code P244B — DPF Differential Pressure
- P-Code P2002 — Diesel Particulate Filter
- P-Code P2452 — DPF Pressure Sensor Circuit
- P-Code P2459 — DPF Regeneration Frequency
- P-Code P2463 — DPF Restriction - Soot Accumulation
Fuel (13)
- P-Code 0093 — Fuel System
- P-Code 0094 — Fuel System
- P-Code 2146 — Fuel Injector Group A
- P-Code P0087 — Fuel Rail Pressure Too Low
- P-Code P0088 — Fuel Rail Pressure Sensor
- P-Code P0182 — Fuel Temperature Sensor Circuit
- P-Code P0193 — Fuel Rail Pressure Sensor Circuit High
- P-Code P0201 — Fuel Injector Cylinder 1
- P-Code P0202 — Fuel Injector Circuit - Cylinder 2
- P-Code P0203 — Fuel Injector 3 Control Circuit
- P-Code P0611 — Fuel Injector Control Module
- P-Code P1093 — Fuel Rail Pressure Too Low During Load
- P-Code P2149 — Fuel Injector Group B Supply Voltage Circuit
Air/Turbo (7)
- P-Code 0243 — Turbocharger Wastegate Solenoid A
- P-Code 2569 — Turbo Boost Control Position Sensor
- P-Code P003A — Turbocharger Boost Control Position Exceeded Learning Limit
- P-Code P0046 — Turbocharger Boost Control Circuit Range/Performance
- P-Code P0101 — MAF Sensor Range/Performance
- P-Code P0234 — Turbocharger Boost Control
- P-Code P2563 — Turbocharger Boost Control Position Sensor Circuit
Coolant (3)
Sensors/Other (25)
- P-Code 0130 — O2 Sensor Bank 1 Sensor 1
- P-Code 0405 — EGR Position Sensor
- P-Code 0470 — Exhaust Pressure Sensor
- P-Code 2031 — Exhaust Gas Temperature Sensor
- P-Code 2032 — Exhaust Gas Temperature Sensor
- P-Code P0219 — Engine Speed Control
- P-Code P0299 — Turbocharger Underboost
- P-Code P0335 — Crankshaft Position Sensor Circuit
- P-Code P0340 — Camshaft Position Sensor
- P-Code P0341 — Camshaft Position Sensor
- P-Code P0401 — EGR Flow Insufficient
- P-Code P0402 — EGR System
- P-Code P0403 — EGR Control Circuit
- P-Code P0404 — EGR Circuit Range/Performance
- P-Code P0471 — Exhaust Pressure Sensor
- P-Code P0472 — Exhaust Backpressure Sensor Circuit
- P-Code P0500 — Vehicle Speed Sensor
- P-Code P0523 — Engine Oil Pressure Sensor Circuit High
- P-Code P0524 — Engine Oil Pressure
- P-Code P0526 — Fan Speed Sensor Circuit
- P-Code P0546 — Exhaust Gas Temperature Sensor 1 Circuit
- P-Code P0562 — Charging System / Battery
- P-Code P0638 — Intake Throttle Valve Control
- P-Code P0670 — Glow Plug Control Circuit
- P-Code P2033 — Exhaust Gas Temperature Sensor Bank 1 Sensor 2