OBD-II code · Electrical & Network
Bus voltage is below spec — charging system, battery, corroded grounds, or a parasitic draw. Modern cars log a dozen unrelated codes from one voltage problem.
Sell a battery + alternator bundle ($700–$1,100). If a corroded ground strap or a module that will not sleep is the cause, the new parts drain too.
Typical guess-and-swap cost: $700–$1,100 (bundle) when the fault is a $15 ground strap
Parasitic-draw test with an ammeter, voltage-drop testing on battery and ground circuits, charging output under load. That is precisely what a flat-rate electrical diagnostic answers.
Mobile service in Canyon Lake, San Antonio & Austin. Written report with root cause — see a sample.