couldn't find the fault in my book or on rosstech but was in garage section on here
17968 P1560 Maximum Engine Speed Exceeded

i didn't even get over 30mph before it came up stop coolant warning opened bonnet and it was boiling the water,was driving maybe 15mins at most,car felt weird as it wasn't heating up inside,then all of a sudden the warning came on.
17840 Possible Causes
Secondary Air Injection Solenoid Valve (N112) faulty
Secondary Air Pump Relay (J299) faulty
Possible Solutions
Check Secondary Air Injection Solenoid Valve (N112)
Check Secondary Air Pump Relay (J299)
i've removed my 112 valve and replaced with resistor could resistor be dead or is it more likely to be relay? and where is it? would any of these cause the water to boil? and car overheat? cheers