hi all complete car noob here, ive had this light come on regularly over the past week with no trend in drive time, speed or gear. The car just cuts off either numerious times in one journey then will go a day without a problem. I have a astra mk4 1.6 8v which i think is the Z16SE engine if im correct. Ive searched the forum many times to see if other people have had similar experences. Ive found my fault codes to be :-

P1122 Accelerator Pedal Position Sensor 2 High Input C-08
Accelerator Pedal Position Sensor 2 Low Input C-08

P1550 Electronic Throttle Control Reduced Power C-09
Electronic Throttle Control Forced Idle C-09
Electronic Throttle Control Power Management C-09
Electronic Throttle Control Engine Stop C-09

P1120 Accelerator Pedal Position Sensor 1 High Input C-08
Accelerator Pedal Position Sensor 1 Low Input C-08
Accelerator Pedal Position Sensor 1-2 Correlation C-08

ive spoken to my local garage who confirmed these code details are correct

i bought a replacement accelerator pedal on ebay which i thought would solve this problem but it hasn't gone away, ive checked all connections, i've had the egr valve off and gave it a good clean even though its only about a year old, ive checked the ht leads and they seem fine, the spark plugs were only just replaced in january. ive cleaned the throttle body thingy. Any help or advice would be very greatful before i have it taken to the garage and if possible dumb it down for me to understand, thanks