In an age of technologically advanced vehicles with onboard self-diagnostic systems we have the equipment and the know how to retrieve information relating to faults on your vehicle. This enables us to diagnose problems and rectify them, bringing your car back to peak running condition.

Roadrunner service centre has a proven track-record solving unique and frustrating faults on vehicles with our state of the art diagnostics systems.


Oil pressure warning light
If the light stays on after starting or illuminates during a journey, stop immediately, switch off the engine and check the engine oil level. Top up straight away if the level is low. If the warning lamp illuminates, even though the oil level is correct, do not start the engine and seek assistance.

Battery charge warning light
If it does not illuminate at all, or if it illuminates while driving, your battery is not being charged as there is a fault with your charging system. If the drive belt is broken, it must be replaced before you restart the engine. The coolant system may rely on this belt and its failure could cause the engine to overheat, in turn causing engine damage. Immediately move the vehicle to a safe location and switch off the engine. Do not restart the engine and call RoadRunner.

Brake system warning light
This light will remain illuminated when the hand brake is engaged. Illumination after releasing the hand brake may indicate low brake fluid level. If the brake fluid is too low and brake pedal travel is distinctly longer than usual, one of the two hydraulic brake circuits may have failed. Do not continue your journey and seek assistance. If the light remains illuminated, even though the brake fluid level is correct, this may indicate a sensor fault. Get The vehicle looked at by RoadRunner as soon as possible.

Diesel Particulate Filter (DPF) partially blocked
Diesel Particulate filters (DPF) or ‘traps’ do just that, they catch bits of soot in the exhaust. As with any filter they have to be emptied regularly to maintain performance. For a DPF this process is called ‘regeneration’ – the accumulated soot is burnt off at high temperature to leave only a tiny ash residue. Regeneration may be either passive or active. It should be possible to start a complete regeneration and clear the warning light by driving for 10 minutes or so at speeds greater than 40mph. If this doesn’t work, contact RoadRunner immediately.

Engine warning light
If it illuminates with the engine running, it indicates a malfunction with the engine management system. Have this checked as soon as possible. If it flashes when driving, reduce the vehicle speed immediately until the light illuminates constantly. If it continues to flash, avoid heavy acceleration and high engine speed, stop the vehicle and have it checked immediately. On some vehicles this light may be red – again stop the vehicle and seek RoadRunner assistance.

ABS warning light
If it illuminates when driving, it indicates a malfunction. Have the vehicle checked by RoadRunner as soon as possible.

Fuel filter water trap (diesel engines)
If it illuminates while driving, it indicates that water has been detected in the fuel filter. This light warns you that the amount of accumulated water in the fuel filter has reached the specified level. Normally the vehicle is quite safe to drive, but have the accumulated water in the fuel filter drained off as soon as possible. If the vehicle has just been re-fuelled, immediately move the vehicle to a safe location and switch off the engine. The fuel may have been contaminated and could cause damage to the injection system. Call RoadRunner Immediately