P0087 on Cadillac
Fuel Rail/System Pressure - Too Low
P0087 on Cadillac vehicles indicates fuel rail/system pressure - too low. Au7o has documented this code across 3 Cadillac models — most commonly on XT4, XT5, XTS. This code means the fuel rail or fuel system pressure has dropped below the level the engine's computer expects. The computer monitors a fuel pressure sensor and has seen pressure fall too low, meaning the engine isn't getting enough fuel — especially noticeable under acceleration or load. This is most common on direct-injection and diesel systems that run very high pressures. Symptoms include hard starting, stalling, hesitation, lack of power, and possible limp mode. Typical repair costs on Cadillac range from $450 to $1,500, depending on the specific model and root cause.
Common Causes of P0087
- •Clogged or dirty fuel filter
- •Weak or failing fuel pump (lift pump or high-pressure pump)
- •Faulty fuel pressure regulator or control valve
- •Restricted or leaking fuel lines
- •Faulty fuel pressure sensor
- •Air in the fuel system or running low on fuel
- •Worn high-pressure pump (direct injection/diesel)
P0087 on Cadillac by Model
Cadillac XT4(1 issue)
- Fuel Pump Control Module Failure Causes Sudden Stall and Crank-No-Start (P203F)2021-2025
The fuel pump power control module (FPCM), mounted under the vehicle near the fuel tank on 9-speed 2.0T LSY XT4s, fails internally and stops commanding the in-tank pump. The failure is typically abrupt with no preceding driveability symptoms: the engine cuts out at speed or refuses to restart after a normal shutdown, and the vehicle cranks but will not fire. Owners report repeat failures on the same vehicle. GM opened a fuel pump control module recall (campaign N252516900) covering a subset of build ranges, but NHTSA complaints show owners with out-of-scope VINs experiencing identical failures, and the pattern spans 2021 through 2025 build years.
Cadillac XT5(1 issue)
- Recall 21V422: Improperly Seated Fuel Supply Line Can Separate and Leak Gasoline2021
GM recalled 2021 Cadillac XT5 and XT6 and GMC Acadia vehicles on which the fuel supply line may not have been fully seated and locked at the quick-connect fitting during assembly. An unseated line can loosen or separate under fuel system pressure and vibration, spraying gasoline in the engine bay or under the vehicle, creating a fire hazard and a potential stall from loss of fuel pressure.
Cadillac XTS(1 issue)
- High-Pressure Direct-Injection Fuel Pump Failure2013-2019
The engine-mounted high-pressure fuel pump (HPFP) on the GM 3.6L direct-injection V6 is a known wear item that fails on the XTS, causing long crank/no-start (especially warm restart), rough idle, stalling and misfires. The most common codes are P0087 (fuel rail pressure too low), P0089 (fuel pressure regulator performance) and P0191 (rail pressure sensor), often with random misfire P0300. Because the high-pressure pump is cam-driven off the engine, a failing pump can drive adaptive fuel trims that mask early symptoms until it strands the car.
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View P0087 across all makes →Frequently Asked Questions
What does P0087 mean on Cadillac?▼
P0087 stands for "Fuel Rail/System Pressure - Too Low." This code means the fuel rail or fuel system pressure has dropped below the level the engine's computer expects. The computer monitors a fuel pressure sensor and has seen pressure fall too low, meaning the engine isn't getting enough fuel — especially noticeable under acceleration or load. This is most common on direct-injection and diesel systems that run very high pressures. Symptoms include hard starting, stalling, hesitation, lack of power, and possible limp mode. On Cadillac specifically, this code is documented across 3 models.
What causes P0087 on Cadillac vehicles?▼
Common causes on Cadillac: Clogged or dirty fuel filter, Weak or failing fuel pump (lift pump or high-pressure pump), Faulty fuel pressure regulator or control valve, Restricted or leaking fuel lines, Faulty fuel pressure sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0087 on a Cadillac?▼
Repair costs on Cadillac range from $450 to $1,500, depending on the specific model and root cause.
Which Cadillac models have P0087 documented?▼
Au7o has documented P0087 on 3 Cadillac models: XT4, XT5, XTS.