I have a diagnostic code that shows 51. Check Engine light was on all the time. Cable was lose to ECM. Tightened cable. Cleared codes. Engine light went off and stayed off but only for one short trip. Next day check engine light only comes on during acceleration. Diagnostic code shows 51 again. OHM readings are 11.4 / 11.3 / 14.0 / 10.9 / 14.6 / 14.9. Any ideas? Would appreciate any help.