Ford P0562

System voltage low on Ford — almost always a failing alternator, weak battery or corroded earth strap on EcoBoost/TDCi models.

Ford P0562 — System voltage low on Ford — almost always a failing alternator, weak battery or corroded earth strap on EcoBoost/TDCi models. Typical UK independent garage cost: £120–£520.

What actually causes P0562 on a Ford

Ford alternators (Visteon/Denso) typically fail around 100k–140k miles — the regulator goes first and voltage drops to 12.0V at idle, P0562 stores. On stop-start equipped 1.0 EcoBoost the AGM battery degrades quickly (often by 60k miles) and the smart charging system can't keep voltage above the threshold. On Transits the engine-to-body earth strap corrodes and causes intermittent low voltage.

Ford engines that log P0562

• 1.0/1.5/1.6 EcoBoost (Fiesta, Focus, Kuga)
• 1.6/2.0 TDCi (Mondeo, Transit, Focus)
• 2.2 TDCi Transit

How we diagnose P0562 on a Ford

1. Measure battery voltage at rest (should be 12.6V+) and at idle (should be 13.8–14.4V)
2. Carry out an alternator output test (should give 60–80A at idle with electrical load)
3. Inspect engine-to-body earth strap for corrosion
4. For stop-start cars, code the new battery to the BMS using FORScan or IDS
5. Check for parasitic drain if voltage drops overnight

The common misdiagnosis to avoid

Replacing a battery without load-testing the alternator wastes the customer's money — a weak alternator will kill the new battery in months. Always test both.

Ford P0562 repair cost in the UK

Expect £120–£520 including parts and labour at an independent garage. Main-dealer quotes on Ford 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

For stop-start equipped Fords (Fiesta/Focus 1.0 EcoBoost), always fit a genuine AGM battery — fitting a cheap flooded one causes stop-start to disable and P0562 to return within a fortnight.

Codes usually seen alongside P0562 on Ford

• P0563
• P0620
• P0625

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 Ford 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 Ford 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 Ford'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 Ford, 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.