Citroen P0562

System voltage low on Citroen — PSA Smart Charging system issues plus BSI (body computer) charging-strategy faults common on C3/C4.

Citroen P0562 — System voltage low on Citroen — PSA Smart Charging system issues plus BSI (body computer) charging-strategy faults common on C3/C4. Typical UK independent garage cost: £100–£420.

What actually causes P0562 on a Citroen

PSA's Smart Charging strategy is controlled by the BSI body computer — it tells the alternator when to charge based on driving conditions and battery state. If the BSI battery-monitoring data corrupts (often after a flat battery jump-start), the strategy fails and the alternator under-charges. C3 and C4 with stop-start need AGM batteries; fitting flooded triggers P0562.

Citroen engines that log P0562

• 1.6 HDi (C3, C4, DS3, Berlingo)
• 1.2/1.6 PureTech (C3, C4, DS3)
• 2.0 HDi (C5, Dispatch)

How we diagnose P0562 on a Citroen

1. Lexia / Diagbox — read BSI battery monitoring data and reset if corrupted
2. Battery rest and load test
3. Alternator output test
4. For stop-start cars, confirm correct AGM battery is fitted and coded
5. Inspect earth points on engine-to-body and battery-to-chassis

The common misdiagnosis to avoid

Don't replace battery or alternator on a Citroen with stop-start until you've checked the BSI battery-monitoring data — a software reset via Diagbox often clears P0562 with no parts changed.

Citroen P0562 repair cost in the UK

Expect £100–£420 including parts and labour at an independent garage. Main-dealer quotes on Citroen 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

If a customer's brought you a C3 PureTech with P0562 after a flat battery / jump-start, almost always a Diagbox software reset of the BSI battery data clears it — bill 30 minutes and send them on their way.

Codes usually seen alongside P0562 on Citroen

• P0563
• P062F
• U1213

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.

Reading P0562 on a Citroen properly

A generic reader will show P0562 and nothing else. What matters is the freeze-frame data stored with it — engine speed, load, coolant temperature and fuel trims at the moment the fault was logged — plus whether any other module on the Citroen has logged something at the same time. Codes rarely arrive alone, and the order they were stored in usually points at which one is the cause and which are the consequences.

Clearing P0562 without fixing it

Erasing the code resets the Citroen's readiness monitors as well as the light. The fault returns on the next drive cycle if the cause is still there, and in the meantime the incomplete monitors can stop the car passing an emissions check. After a genuine repair, the car is driven until the relevant monitor completes before it is handed back.

Bob's Mechanical Repairs is an independent garage in Birnam, Dunkeld, Perthshire, with 32 years of Bob's experience on the tools. If P0562 is showing on your Citroen, bring any scan results with you — we will read the live data ourselves, confirm which cause it actually is, and price the repair before any work starts.