Initial diagnostic assessment
£50The expected initial scope and any travel charge are confirmed before booking. Parts, repairs and additional diagnostic work are not included unless stated.
Read the £50 assessment detailsMobile fault investigation
Mobile Diagnostic Fault Investigation
Mobile car diagnostics across Sunderland, Newcastle and Durham for no-start, limp-mode, electrical and module-communication faults. Conclusions follow available tests and symptoms rather than guesswork.
Fault-code reading is only one part of diagnosis
A scan shows which control units have recorded faults and provides useful direction. It does not prove which component has failed. An ECU-named code may be caused by low voltage, power, ground, wiring, network communication, sensor supply, actuator or software issues.
The available investigation depends on the symptoms, access and vehicle condition. Testing may include power and ground checks, voltage-drop measurement, wiring checks, sensor supply, CAN or LIN communication, live data and supported actuator checks.
Situations we can assess
Common starting points for investigation
No-start faults
Battery voltage, supply, ground, communication, immobiliser status, sensor data and other relevant evidence may need checking before an ECU is suspected.
Limp-mode and warning lights
Stored codes, live data and system behaviour help distinguish an active fault from an old or secondary code.
Electrical and network faults
CAN/LIN communication, voltage drop, connector condition and wiring can affect several modules and create misleading symptoms.
What the initial assessment covers
- Review of reported symptoms and relevant history
- Initial diagnostic scan where access allows
- Relevant first-stage tests selected from the evidence
- Explanation of findings and a sensible next step
What is not automatically included
- Replacement parts or physical repairs
- Unlimited diagnostic time or dismantling
- Subscriptions, coding or programming
- A guaranteed final diagnosis within the first visit
- Travel outside the agreed normal service area
Not every fault can be fully isolated during the initial assessment. Further tracing may be quoted when intermittent conditions, limited access, dismantling or extended circuit testing is required.
Mobile booking and coverage
Vehicle location, safe access and travel are confirmed before booking. Mobile enquiries are considered across Sunderland, Newcastle upon Tyne and Durham, with wider North East travel by prior agreement. Working/contact hours are Monday–Sunday, 8:00 am–6:00 pm; these hours do not promise immediate attendance or same-day service.
See mobile diagnostic coverage in the North East or read the diagnostic and booking FAQs.
Describe the fault before booking
Send the registration or VIN, symptoms, warning lights, fault codes, previous work and vehicle location. Clear information helps establish the first tests and likely scope.