Electrical and Charging

Supplies, grounds, relays, fuses and the harness itself. Worth its own system because wiring is the most common cause across the entire corpus — connectors and chafed looms account for more stored codes than any component category.

1201 codes · 32 components · 2 live parameters

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Components

Live parameters to watch

PID	Parameter	Unit	Conversion
01:42	Control module voltage Supply voltage at the control module. Worth checking early in any confusing diagnosis: low or unstable voltage produces sensor readings that look like component faults, and chasing those wastes hours.	V	((256 × A) + B) / 1000
01:5B	Hybrid battery pack remaining life Remaining usable capacity of a hybrid battery pack. One of the few parameters that speaks directly to a component's remaining service life rather than its present state.	%	A × 100 / 255

Trouble codes

High 424

Moderate 446

Low 179

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

Working on this system

Be the first to write this up

Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.

What makes one worth reading:

The car — make, model, year and engine. The same fault behaves differently on each.
What you measured, not only what you replaced.
What actually fixed it — or that nothing did, which is worth knowing too.