Vauxhall P0087

Fuel rail pressure too low on Vauxhall — 1.7/2.0 CDTi lift pump failure and HP pump wear.

Vauxhall P0087 — Fuel rail pressure too low on Vauxhall — 1.7/2.0 CDTi lift pump failure and HP pump wear. Typical UK independent garage cost: £180–£1600.

What actually causes P0087 on a Vauxhall

Vauxhall CDTi P0087 — start at the in-tank lift pump (often the cheap fix), then HP pump if supply is healthy.

Vauxhall engines that log P0087

• 1.7 CDTi Z17DTH (Astra/Meriva)
• 2.0 CDTi A20DTH (Insignia/Zafira)

How we diagnose P0087 on a Vauxhall

1. Lift pump pressure test
2. Filter swarf check
3. Live rail pressure
4. Bosch reman pump if confirmed

The common misdiagnosis to avoid

Lift pump £140 vs HP pump £900 — never skip the supply pressure test.

Vauxhall P0087 repair cost in the UK

Expect £180–£1600 including parts and labour at an independent garage. Main-dealer quotes on Vauxhall 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

Insignia 2.0 CDTi P0087 in cold weather = supply pressure test + diesel additive. Half the time it's that simple.

Codes usually seen alongside P0087 on Vauxhall

• P0088
• P0089

Symptoms drivers report with P0087

• Sudden loss of power on the motorway — car drops into limp mode at exactly 2,500 RPM
• Restarts fine after a key-cycle, then relimps under load 20 minutes later
• Hard cold-starting: cranks for 4–6 seconds before catching
• Uneven idle with a diesel-knock 'nail' from cold
• MPG drops 3–7 mpg before the light even comes on
• Metal glitter in the fuel filter housing = CP4 pump has already grenaded

Repairs that clear P0087

• Change the fuel filter and retest
• Measure injector back-leakage into a graduated tube
• Test rail pressure against commanded on live data
• Replace the pressure regulator or metering valve

For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0087 guide.

Reading P0087 on a Vauxhall properly

A generic reader will show P0087 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 Vauxhall 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 P0087 without fixing it

Erasing the code resets the Vauxhall'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 P0087 is showing on your Vauxhall, 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.