Ford P0507

Idle speed higher than expected on Ford — vacuum leak via dump valve or PCV on 1.0/1.5/1.6 EcoBoost.

Ford P0507 — Idle speed higher than expected on Ford — vacuum leak via dump valve or PCV on 1.0/1.5/1.6 EcoBoost. Typical UK independent garage cost: £35–£280.

What actually causes P0507 on a Ford

EcoBoost P0507 mirrors P2279 — perished dump-valve diaphragm or split silicone elbow. The ECU loses control of idle because un-metered air enters the intake. Smoke test in 10 minutes.

Ford engines that log P0507

• 1.0 EcoBoost
• 1.5/1.6 EcoBoost
• 2.0 EcoBoost

How we diagnose P0507 on a Ford

1. Smoke-test full intake system
2. Inspect dump valve diaphragm
3. Check PCV hose for splits and oil filler cap seal
4. Reset idle adaptation after repair

The common misdiagnosis to avoid

Throttle body cleaning is not the answer — clean it if dirty, but the leak still needs fixing. Smoke-test every P0507 on Ford.

Ford P0507 repair cost in the UK

Expect £35–£280 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

EcoBoost P0507 — leak first, throttle clean second. Adaptation reset last or new readings get corrupted by the old leak.

Codes usually seen alongside P0507 on Ford

• P0171
• P2279

Symptoms drivers report with P0507

• The car feels like it's 'creeping' forward too fast at traffic lights without touching the gas.
• Engine revs stay hung up at 1200rpm when you dip the clutch approaching an intersection.
• A noticeable 'hissing' or whistling noise from the engine bay when idling on the driveway.
• The stop-start system has stopped working because the idle isn't stable enough for the ECU.
• Surging or 'hunting' revs when you first start it from cold in the morning.

Repairs that clear P0507

• Smoke-test intake
• Clean throttle body
• Replace PCV valve / rocker cover
• Inspect all vacuum hoses

For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0507 guide.

Reading P0507 on a Ford properly

A generic reader will show P0507 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 P0507 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 P0507 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.