P0562 — System Voltage Low (GWM Context)
Standard meaning: the ECU saw system voltage below threshold long enough to log it. In GWM’s hybrid-heavy range the 12V battery doesn’t crank the engine — it boots the computers that decide whether anything else is allowed to happen. A weak 12V therefore shows up as electrical chaos (warnings, resets, refusal to start) before it shows up as a “flat battery”.
What it means on your GWM
| If you drive… | Context | First move |
|---|---|---|
| Jolion / H6 hybrid | 12V runs the wake-up and contactor logic; hybrids top it up from the traction battery on their own schedule. | 12V health test and software currency together — a tired battery and stale top-up logic mimic each other. |
| Ora | EV — same architecture logic. Also confirm the charging-arc recall update is done while you’re at the dealer. | Battery test + update in one visit. |
| Cannon / Tank diesel & petrol | Conventional charging system: battery age, terminals, alternator. | The classic checks, in that order. |
Safe owner checks
- Battery age (label date) and terminal condition — clean and tight is free.
- Pattern of the failures: after the car sits days? That’s drain/top-up logic. Mid-drive? Charging system.
- A $30 Bluetooth 12V monitor answers “how low, when” better than any anecdote.
When it’s a workshop job
Repeat episodes after a healthy battery test = software/charging-logic territory; ask for the DC-DC/top-up strategy check by name. On 2025 Tank 500/Tank 300/Cannon Alpha hybrids with additional communication faults alongside voltage complaints, the U0100 recall context applies — VIN check first.
Code definition per SAE J2012. Context: our GWM problems research and the family 12V pattern documented across our Chinese-brand coverage.