Check-engine lights
Fault-code, freeze-frame, live-data, and circuit testing to determine what the code actually means.
Advanced diagnostics · Troy, Michigan
Mobile auto diagnostics
without the guesswork.
A trouble code identifies the system that noticed a problem—not automatically the failed part. We bring focused testing to the vehicle and follow the evidence before recommending parts.
When to call
Problems we
handle.
Truth Mobile Diagnostics focuses on evidence-based testing. We verify the complaint, test the affected system, and explain what the results support before recommending a repair.
Misfires and poor running
Testing for rough idle, hesitation, stalling, loss of power, and intermittent drivability complaints.
Battery drains
Parasitic-draw testing to identify circuits or modules that remain active when the vehicle should be asleep.
Module communication
CAN/LIN network and module communication concerns that require more than a consumer scan tool.
What the service includes
Diagnosis—not
parts swapping.
We diagnose domestic, Asian, and European passenger vehicles and light trucks. Testing time depends on access, fault complexity, whether the problem is currently present, and whether previous repairs altered the system.
- 01Document symptoms, conditions, and recent repairs
- 02Complete a full-system scan and review freeze-frame data
- 03Analyze live data and verify inputs and outputs
- 04Perform circuit, mechanical, or network tests as required
- 05Provide the confirmed finding, evidence, and repair direction
Local mobile service
Serving Troy
where the vehicle sits.
Appointments are available at homes, workplaces, dealerships, private sellers, and roadside locations when the setting is safe and suitable. Primary coverage includes Troy, Rochester Hills, Sterling Heights, Royal Oak, Madison Heights, Birmingham, Auburn Hills, Pontiac, and Warren.
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Common questions
Before you book.
Is a code scan the same as a diagnosis?+
No. A scan supplies fault information. Diagnosis requires interpreting that information and testing the system before identifying the cause.
Can you diagnose intermittent problems?+
Often, but intermittent faults may require the condition to occur, additional monitoring, or a follow-up testing plan.
Will I receive an explanation?+
Yes. You receive a plain-language explanation of the finding and recommended next step.
How long does diagnosis take?+
The initial visit includes up to 60 minutes. You will be told before additional diagnostic time is used.