Fault Finding, Not Just Fault Code Reading
Modern vehicles can store many fault codes, but a code does not always mean that part is faulty. A sensor reading may be caused by wiring, air leaks, fuel issues, low voltage, mechanical problems or previous faults stored in the system.
Our approach is to read the fault information, check live data where useful, and test the likely cause before recommending repair work. That helps avoid replacing parts just because a code appeared on the screen.
Problems We Investigate
- Engine management lights
- ABS, airbag and traction warning lights
- Electrical faults and intermittent issues
- Poor starting, rough running or loss of power
- Sensor faults and wiring problems
- Battery, charging and communication faults
Why Proper Diagnosis Matters
- A fault code is treated as a clue, not the final answer
- Live data and symptoms are considered together
- Testing helps reduce unnecessary parts replacement
- Intermittent faults can be logged and investigated more carefully
- You receive clearer advice before approving repairs
How We Approach a Diagnostic
We connect dealer-level scan tools to read stored and pending diagnostic trouble codes (DTCs), freeze frame data, and any historic fault history the vehicle has logged.
Where useful, we monitor live sensor values — fuel trims, voltage, temperatures, airflow — while the engine runs. A code pointing at a sensor often has a root cause elsewhere.
If a sensor or component is suspect, we test it directly — checking wiring continuity, resistance, and signal patterns before condemning any part. This avoids replacing good components.
You receive a straightforward explanation of the fault and the repair options available, including cost, before any work is authorised. No pressure, no surprises.
Local Garage Support in Trowbridge
NGM Motors is based at Lower Court, Trowbridge, BA14 8PX. We help customers from Trowbridge, Melksham, Bradford-on-Avon, Westbury, Frome, Warminster, Chippenham, Bath and surrounding Wiltshire areas.
Frequently Asked Questions
No. Scanning is only part of the process. We use the fault codes as a starting point and carry out checks to confirm what is causing the issue.
Yes. We investigate engine management lights, running issues, sensor faults and related electrical or mechanical problems.
Intermittent faults can be more difficult, but we can check stored codes, live data, wiring and symptoms to narrow down the cause.
Sometimes it will, but not always. Some faults need further testing before a reliable quote can be given.
Call, WhatsApp or book online. NGM Motors will confirm your request and advise the next step clearly.