I've got error code 124 down as "TP voltage was higher than expected”
Looking at the source code this equates to 63360 A to D counts, which divided by 16384 = 3.8671875 volts. If this value is this more than the measured voltage when the throttle is fully open you shouldn’t get error 124.
Does this help?
Oops screw up...
63360 A to D counts should have been divided by 12800, which gives 4.95 volts.