Got in car from work tonight turned ignition and and warning symbol (exhaust gases) came on and stayed on have driven home 8 mile or so and car is running as good as ever? It's due infor mot with vx in morning (typical) its a 57 Sri 150 with 68k on the clock. Have tried disconnecting battery for 3 mins still stays on.. I know it's a lottery as to what could be but anyone got any suggestions/advice really appreciate any feedback