A nonsense mutation in the leptin gene that results in a stop codon and lack of leptin production was first observed in mice in 1950. In the mouse gene, arginine-105 is encoded by CGA and only requires one nucleotide change to create the stop codon TGA.
The fuel pump relay, located deep inside the TIPM, is the most common relay to fail since it's powered on 100% of the time while you're driving. You likely found this website because your dealer wants to change your fuel pump ($600+) or TIPM ($1000+).
Part 3 of 3: Replacing your ignition switch. Your ignition switch is typically located right behind the key cylinder (where you insert your key). This may be in the steering column or in the dash. You will need to remove any covers or dash panels to access the switch.