hi I have 2 fault codes if anyone could please help. As i have the engine management light on And anternative engine management on ( when glow plug lights flash when driving) the codes are P1588 00 (044) open circuit and throttle position sensor (g69) P0122 00 (175) signal too low. Any ideas on the part I need to fix these and any other information would be very helpful. Thank you very much for your time