Before Booking a Diagnostic Scan
At Dual Action Roadside, the goal is to make the whole process as smooth and efficient as possible, giving you clear, honest information about the service so you can decide if it’s the right solution for your vehicle’s problem.
Battery Condition:
A weak battery can cause "ghost" fault codes. If your car won't start and has lights on, we may start with a battery test.
Intermittent Faults:
If the light is currently off, the code is likely stored in "History." I can possibly still retrieve these to find the root cause.
Safety First:
If your car is making loud knocking noises or trailing smoke, please turn it off immediately and mention this when you call.
Booking Fault Code Reading
Whats Included
Travel up to 10 miles to your location
ODB Codes Read and report provided
Up to 30 minutes on scene time to read codes
Information needed
Vehicle Registration
Vehicle Location Address
Confirmation can access vehicle & battey location
What you pay
Normal Hours
Mon – Sun 08:00am – 20:00pm
£
45
When you pay
Payment is collected on completion of service
How you can pay
Accepted Payment Methods
Card
Card & Contactless
Bank Transfer
SERvice Overview
Dual Action Roadside provides a mobile diagnostic service for motorists facing "Check Engine" lights, ABS warnings, Airbag faults, or "Limp Mode" issues.
Modern vehicles are essentially rolling computers. When a sensor detects a fault, it stores a DTC (Diagnostic Trouble Code) in the Engine Control Unit (ECU).
I attend your location with diagnostic scanners to communicate with your vehicle’s onboard systems, providing a clear picture of what is actually happening under the bonnet.
Why Use my Professional Diagnostic Service?
The habit of swapping expensive parts hoping to fix a light is a waste of money. Using Dual Action Roadside ensures:
Avoid Main Dealer Prices: Get the same high-level diagnostic data without the high diagnostic fee at a dealership or having to wait to get a booking.
Convenience: I come to you in Watford, St Albans, or Harrow. No need to limp a faulty car to a garage and wait all days for a report.
Honesty: I don’t run a garage; I have no interest in finding extra work. You get an unbiased, honest report on your vehicle’s health..
Arrange Fault Code Reading
Call 07594 218651 Now
Vehicles Serviced
I provide fault code reading services for most vehicles upto 3.5t.
Common Warning Lights
Some of the most common warning lights:
Check Engine Light (MIL)
ABS / Traction Control
Airbag (SRS) Lights
DPF / Diesel Particulate Filter
EPB (Electronic Parking Brake)
Flat Code Reading Diagnostics
Professional on-site vehicle diagnostics to read, clear, and explain your car’s fault codes
OBD-II System Connection I connect my professional diagnostic interface to your vehicle’s OBD port to establish communication with the various modules (Engine, Transmission, ABS, SRS).
Full System Health Scan I perform a deep scan to identify "Hard Faults" (permanent issues) and "Pending Codes" (intermittent glitches) that standard basic scanners often miss
Explanation & Report I translate technical "P-Codes" into plain English. You will receive clear advice on whether the car is safe to drive and what specific repairs are likely required at a garage.
Mobile Vehicle Fault Code Reading Service Areas
Watford
Hertfordshire
Watford, WD17, WD18, WD19, WD24, WD25
Bushey WD23
Rickmansworth WD3
Kings Langley WD4
Abbots Langley WD5
Borehamwood WD6
Radlett WD7
St Albans
Hertfordshire
St Albans AL1, AL2, AL3, AL4
Hemel Hempstead
Hertfordshire
Hemel Hempstead HP1, HP2, HP3
Harrow
Greater London
Harrow HA1, HA2, HA3
Ruislip HA4
Pinner HA5
Northwood HA6
Stanmore HA7
Edgware HA8
