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First get it computer diagnosed then post the codes here then only we can help you with further diagnosis I hope this helps...the engine light is there for a reason it has some codes stored thats why its light up

With a P0742 DTC it makes sense the engine ECU is talking to the tranny ECU if it has one ans not letting it upshift to protect the drive train from.damage as the speed difference between the vehicle and transmission is greater than the set tolerance limit.And vehicle speed is detected by you guessed it vehicle speed sensor usually near the tranny output shaft. So a faulty speed sensor could trigger this. The delayed start is due to the cam sensor as it telles the ECU where the engine is in its cycle TDC BTDC etc efc so it can control the injectors and spark plugs. With a intermittent working sensor this would cause starting problems. Its good advice to have the codes cleared to see if it helps. If the engibe light comes back on and so do the symptoms 1st check the for loose connections on both the sensors. A bump or repeated vibration could have set them loose. Open clean the connectors and try clearing the codes again ( this is where your own diagnostic equipment or at the very least an OBD reader come in handy) if not. Replace both the vehicle speed and cam position sensor and most probably this should take care of your problem. Cheers

Hi anshaj tell the garage guy to delete the codes and check if it is present code it will come back or else drive the vehicle and keep under observation. Check the ignition coils and plug wires too. All theses codes will set due to engine long cranking and may be problem with crankposition sensor.

Hitting the red line once for a second or two won't do damage, but do not make it a habit, especially on engines that never (or very seldom) run at revs that approach the red line. The red line is there for a reason, and if you go there or beyond it often, or for prolonged periods, you can damage bearings, but more likely rings and pistons because the high reciprocal speeds can squeeze the ring grooves closed.

Or using diesel oil in old push rod motors, that seem to piss off a lot of people too!