Thread: C70: - engine management light
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Old Nov 17th, 2020, 22:50   #3
capt jack
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Last Online: Mar 26th, 2024 20:51
Join Date: Jun 2006
Location: Selby, North Yorkshire
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Well if it's running on only 4 cylinders the EML will certainly come on. It depends on exactly which ignition and engine management system your car has. If it's electrical the problem could be a failed spark plug, a failed HT lead, a failed coil (if it has 5 individual coil packs), or a damaged distributor cap or rotor (if it has a single coil and a distributor).

If it's a fuel-related problem it could be a failed injector, or more seriously if it's a mechanical failure it could be a problem with a cylinder head valve.

Absolutely you need to get the fault codes downloaded and read. Again, it depends upon which system your car has, but if it's fully OBD2 compliant then any garage should be able to at least read the fault codes - or you could buy a cheap code reader and do it yourself. If you're in a breakdown service why not ask them if they'll attend and check the car over?

But fault codes are there to take much of the guesswork out of diagnostics, and that's the place to start.

Cheers

Jack
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