DTC Hub Commercial Truck & Diesel Fault Codes
Brands Symptoms About

Diagnose by Symptom

Select the symptom your truck is experiencing to find matching fault codes. 110 symptoms indexed across all engine brands.

A

Abs Light On 1 fault codes All Dash Lights On 1 fault codes • 1 STOP All Dash Warning Lights 1 fault codes • 1 STOP

B

Black Smoke 4 fault codes • 2 STOP Black Smoke From Exhaust 1 fault codes Black Smoke On Acceleration 1 fault codes Black Smoke Under Acceleration 1 fault codes Brake Lights Stay On 1 fault codes

C

Check Engine Light 19 fault codes • 1 STOP Check Engine Light Intermittent 1 fault codes Check Transmission Light 1 fault codes Coolant Boiling 1 fault codes • 1 STOP Coolant Light Intermittent 1 fault codes Coolant Loss 2 fault codes • 2 STOP Coolant Smell 1 fault codes • 1 STOP Cranking But No Fire 2 fault codes • 1 STOP Cranking But No Start 2 fault codes • 2 STOP Cruise Control Inoperative 1 fault codes Cruise Control Overshoots 1 fault codes Cruise Control Surges 1 fault codes Cruise Control Won T Disengage 1 fault codes

D

Def Warning 7 fault codes • 1 STOP Derate Active 3 fault codes Derate Countdown 1 fault codes Derate Pending 1 fault codes Derate Pending Soon 1 fault codes Doc Efficiency Low 1 fault codes

E

Egr Flow Insufficient 2 fault codes Engine Derate 7 fault codes • 3 STOP Engine Derate Intermittent 1 fault codes Engine Dies 4 fault codes • 3 STOP Engine Dies Suddenly 1 fault codes • 1 STOP Engine Idle Only 1 fault codes Engine Knock 1 fault codes • 1 STOP Engine Misfire 2 fault codes Engine Noise 1 fault codes • 1 STOP Engine Won T Enter Regen Mode 1 fault codes Erratic Boost Gauge 1 fault codes Excessive Vibration 1 fault codes

F

False Warning 1 fault codes Fuel Consumption High 1 fault codes Fuel Consumption Increase 3 fault codes Fuel Consumption Increased 1 fault codes Fuel Economy Calculation Wrong 1 fault codes Fuel Economy Decreased 2 fault codes Fuel Knock 4 fault codes • 2 STOP Fuel Pressure Zero 1 fault codes • 1 STOP Fuel Smell 1 fault codes

G

Gauges Inoperative 1 fault codes • 1 STOP

H

Hard Starting When Hot 1 fault codes Harsh Shifting 1 fault codes High Exhaust Temperature 1 fault codes • 1 STOP High Nox 1 fault codes High Nox Reading 1 fault codes

I

Intermittent Stall 1 fault codes Intermittent Throttle 1 fault codes

L

Limp Mode 1 fault codes • 1 STOP Loss Of Power 7 fault codes • 4 STOP Loss Of Throttle 1 fault codes Low Coolant Light 1 fault codes • 1 STOP Low Coolant Light On But Level Ok 1 fault codes Low Coolant Warning 1 fault codes • 1 STOP Low Oil Pressure 1 fault codes • 1 STOP

M

Metal Debris In Fuel 1 fault codes • 1 STOP Metal In Fuel 1 fault codes • 1 STOP Metal In Oil 1 fault codes • 1 STOP Metal Shavings In Fuel Filter 1 fault codes • 1 STOP

N

No Communication 2 fault codes • 2 STOP

O

Oil Level Rising 1 fault codes Oil Light 1 fault codes • 1 STOP Overheating 3 fault codes • 3 STOP Overspeed Warning At Normal Speeds 1 fault codes

P

Pedal Not Responding 1 fault codes Pump Not Priming 1 fault codes

R

Regen Frequent 2 fault codes Rough Idle 3 fault codes Rough Idle At Cold Start 1 fault codes

S

Scan Tool Nox Biased 1 fault codes Scr Dosing Stopped 1 fault codes Scr Efficiency Low 1 fault codes Scr Failure 1 fault codes • 1 STOP Scr Fault 1 fault codes Scr Malfunction 3 fault codes Scr Warning 1 fault codes Shift Quality Poor 1 fault codes Speed Limited 2 fault codes • 1 STOP Speedometer Bounces 1 fault codes Speedometer Erratic 1 fault codes Speedometer Reads High 1 fault codes Steam From Radiator 1 fault codes • 1 STOP

T

Tachometer Erratic 1 fault codes Temp Gauge In Red 1 fault codes • 1 STOP Temp Gauge Not Working 1 fault codes Temp Sensor Implausible 1 fault codes Tow Required 1 fault codes • 1 STOP Transmission Hot 1 fault codes Transmission Shifts Early 1 fault codes Transmission Slipping 1 fault codes Transmission Upshifts Early 1 fault codes Transmission Won T Shift Out Of Park 1 fault codes Turbo Actuator Buzz 1 fault codes Turbo Lag 2 fault codes Turbo Noise 1 fault codes Turbo Underboost 3 fault codes • 2 STOP Turbo Underboost After Restart 1 fault codes

W

White Crystals 1 fault codes White Smoke 3 fault codes • 2 STOP Won T Restart 3 fault codes • 3 STOP Won T Start 4 fault codes • 2 STOP