The stop light and "coolant" light came on whilst driving. switchen engine off and restarted and they had gone off

the fan belt is damaged, lost , slipping or shredded.
do not drive far like that or risk wrecking a good engine
open hood, see SERP belt bad> or missing? bingo
.

Check engine oil level. If level is ok, check oil pressure with manual gauge. Sounds like it's loosing oil pressure. What's the mileage on the vehicle?

were you driving over undergrond power cables at the time? ,or near a radar installation?

it lights up because the CPU has recorded a fault that needs urgent attention. stop check oil and coolant levels. have a fault code reading done and fix the fault. To continue driving will eventually place the engine in low power mode or will cause big dollar repairs.

What you do when the engine light comes on is to stop the vehicle ---check the oil level and let it cool down then check the coolant level at the radiator. The engine light is the message to you that the CPU has found sensors /servos that have gone outside set parameters and your course of action then is to prove that the engine is safe then run the fault codes to find the recorded faults and fix them . use the code reader to reset the CPU to ensure that the faults are fixed.

you need to get someone with a obd reader to get the fault codes out of the engine controle module to help you sort that out it could be lots of things but sounds like a fuel delivery problem like fuel filter restricted or pump faulty

hi could you please give some more info as engine broken ? does not help what happened ? is engine petrol? or diesel? milage ? did car suddenly stop whilst driving? any noises from engine b4 it brokedown ? is oil and coolant levels ok ?

hi, if the collant level is ok and the car isnt over heating then check the heater works in the car and make sure it gives of heat when hot is selected if it dont then the chances are the thermostat has gone and needs replacing.

If on the other hand you have heat then the chances are its just a faulty temp sensot these are cheap to buy and easy to replace.

Let me know how you get on or if you need further assistance ok

If you locate the water expansion tank (front of the bonnet, opened, with the pressure-cap to top-up if necessary) - check that there's sufficient coolant in there (check whilst the engine is cold).

If so, you may be suffering the same problem as a lot of RX8 owners, with a dodgy coolant level sensor in the tank. One way to confirm this is to remove the connector to the tank - on the left-hand side of the tank as you look from the front (not the air-conditioning connector, immediately to the left of it, attached to an aluminium billet). Ensure the (now free-hanging) connector from the wiring loom is safely stowed and give it a test drive. If you're satisified that the warning goes away then you know that the level sensor in the tank is faulty (and therefore the warning light is spurious). Unfortunately, that's a pricey item to replace (dealer price, UK, in the region of £200).

Remember, leaving the coolant sensor unplugged to avoid the spurious warnings would mean that a genuine problem that resulted in (catestrophic) loss of coolant would then go undetected, until too late. So do this at your peril.

check engine temperature water coolent in radiator