System voltage low on VW — battery or alternator failure, with battery-coding via VCDS essential on any post-2011 Golf/Passat.
Volkswagen P0562 — System voltage low on VW — battery or alternator failure, with battery-coding via VCDS essential on any post-2011 Golf/Passat. Typical UK independent garage cost: £100–£420.
What actually causes P0562 on a Volkswagen
VW alternators (Valeo/Bosch) generally last 150k+ miles, so battery is the more common cause. On Mk7 Golf and B8 Passat the battery management system (BMS) needs new batteries CODED via VCDS — without coding, the alternator continues to charge based on the old battery's profile and undercharges the new one, triggering P0562 within weeks.
Volkswagen engines that log P0562
- 1.4/1.6 TDI/TSI (Golf, Polo, Passat, Caddy)
- 2.0 TDI/TSI (Golf, Passat, Tiguan, Touran)
- 1.0/1.4 TSI (Polo, Golf, Up)
How we diagnose P0562 on a Volkswagen
- VCDS — read battery monitoring module data, check coded vs actual battery type
- Battery voltage at rest, at idle, and under load
- Alternator output test
- Code new battery (AGM/EFB/flooded) to BMS via VCDS adaptation
- Reset the energy management adaption afterwards
The common misdiagnosis to avoid
Quick-fits and chain garages don't usually code VW batteries — if a customer brings you a Mk7+ Golf with P0562 within 6 months of a new battery elsewhere, code it first before ordering more parts.
Volkswagen P0562 repair cost in the UK
Expect £100–£420 including parts and labour at an independent garage. Main-dealer quotes on Volkswagen are usually higher for the same job, and the spread exists because the cheap cause and the expensive cause throw the same code — pay for the diagnosis before you pay for parts.
Bob's workshop tip
Charge £25 to code a customer's already-installed battery — it's a 4-minute job, fixes P0562 90% of the time on these cars, and saves them a new alternator they didn't need.
Codes usually seen alongside P0562 on Volkswagen
- P0563
- P162E
- P062F
Symptoms drivers report with P0562
- Battery warning light flickers intermittently, especially at idle with electrical load on
- Dashboard dims when indicators are on or wipers run
- Car fails to start cold after sitting for 2–3 days
- Stop-start system disables itself with a 'battery saver active' message
- Voltmeter reads below 13.2V with engine running
Repairs that clear P0562
- Load-test battery
- Alternator output test
- Clean and torque earths
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0562 guide.