Published on January 8th, 2016 | by Daniel Sherman Fernandez0
What To Do When You See Your ECU/engine warning light On
This warning light illuminates when the ignition is switched on. It should extinguish as soon as the engine comes to life. If it stays illuminated 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 assistance. If it is safe to do so, try stopping the vehicle, switching off the engine, wait two minutes, then restarting the engine to reset the engine management system.
On some cars if your engine warning light stays illuminated, often it will be accompanied by some unusual symptoms, these could include a lack of power, as the car has gone into ‘safe’ mode to protect itself; an intermittent stuttering as you press the accelerator, caused by a misfire; or another fault which could alter the normal response from the engine.
Sometimes this can be down to something as small as a faulty electrical sensor, although sometimes it can be a larger mechanical issue. If your car’s engine warning light is showing, get a professional mechanic to look over it straight away, as driving around any longer could cause further, and potentially irreparable damage.