Check-engine lamp
Send the lamp color and exact dashboard message, along with any recorded codes. A warning that appears without a drivability change still needs context.
START WITH THE EVIDENCE
Detroit Diesel Engine Diagnostics
A warning light, rough running or intermittent shutdown needs more than a code description. Fault codes, operating data and engine-specific tests guide the assessment. Share the engine model, serial number, warning messages and recent repair history to plan the diagnostic visit.
WHAT TO REPORT
The symptoms set the starting point.
Intermittent shutdown
Record whether the engine shut down hot, at idle, under load or after a restart. Include any display changes and recent electrical or fuel-system work.
Unexpected fuel use
Describe the duty cycle, load, recent maintenance and when the change began. Consumption alone does not isolate an engine, fuel or aftertreatment fault.
Rough running
Note whether the roughness appears cold, warm or during acceleration. A video made from a safe position can help explain the complaint.
ASSESSMENT PROCESS
A clear diagnostic approach.
Identify the Detroit application
Record the engine model and serial number, vehicle details, fault history and operating conditions. DD13, DD15, DD16 and legacy Series 60 applications have different system and tool requirements.
Correlate data and tests
Where confirmed tooling supports the application, relevant operating data and targeted physical checks are compared with engine-specific service information.
Document the decision
The next step distinguishes a supported finding from an unresolved possibility, including further testing, repair options or referral for facility work.
SAFE MOBILE SCOPE
At the truck.
With the right plan.
A safe mobile diagnostic visit may suit accessible checks and engine-system testing that can be performed without exposing people to traffic, moving equipment or uncontrolled exhaust. Capability and compatible diagnostic equipment must be confirmed for the particular application. Some intermittent conditions need an extended test, loaded operation or facility equipment. Diagnostic time is separate from repair authorization, and a code scan alone is not a guarantee that the underlying fault has been located.
SERVICE QUESTIONS
Before the visit.
Can you diagnose the truck from a fault-code photo?
A photo helps triage the request. Confirmation normally requires the correct engine information, operating context and suitable tests; the code alone does not prove a failed part.
Should I erase the codes first?
Preserve the messages and code history for the assessment unless the vehicle manufacturer's instructions or an attending qualified technician direct otherwise.
Are all engine models supported?
Model support and diagnostic-tool compatibility require confirmation. Provide the engine and vehicle details before scheduling so support can be checked.
RELATED ENGINE SERVICES
Keep the system in view.
DETROIT ENGINE SERVICE
Derate Diagnostics
Assess reduced power, speed limits and active engine warnings.
Explore service DETROIT ENGINE SERVICENo-Start Repair
Find the cause of no-crank, slow-crank and crank-no-start conditions.
Explore service DETROIT ENGINE SERVICEFuel System
Hard starting, stalling or hesitation under load? Request mobile Detroit Diesel fuel system diagnostics at your South Florida truck and share recent fuel history.
Explore serviceREQUEST MOBILE SERVICE
Request mobile service.
Tell us about your engine, service needs and vehicle location.
Need to talk it through?
A stopped truck, warning message or new engine symptom starts with the right information.
754-203-3569In an active traffic lane or immediate danger, prioritize emergency or roadway assistance.