P0087 on 2011-2018 Ford Focus 1.6L EcoBoost: Low Fuel Rail Pressure Causes and Fixes

What's Unique About the 2011-2018 Ford Focus

For this generation of Ford EcoBoost engines, including the 1.6L in the Focus, P0087 presents a classic diagnostic challenge between two very common failure points: a cheap sensor or an expensive pump. Ford issued a Special Service Message (SSM 48397) specifically acknowledging that a faulty Fuel Low Pressure (FLP) sensor is a primary cause for this code on 2013-2015 models. Many owners mistakenly replace the costly high-pressure fuel pump (HPFP) when the actual problem was the much less expensive sensor, making proper diagnosis critical to avoid unnecessary expense. This issue is shared across platform mates like the Ford Escape and Fiesta ST with the same engine.

Symptoms You May Notice

• Sudden loss of engine power, sometimes described as 'limp mode'.
• Engine will not rev past a certain RPM (e.g., 3,000 RPM).
• Hesitation, stuttering, or bucking during acceleration.
• Engine stalling, especially at idle or low speeds when warm.
• Rough or unstable idle.
• Difficulty starting the engine or long crank times.
• Illuminated Check Engine Light.
• Audible ticking from the HPFP becomes quieter or disappears.

Most Likely Causes

1. Faulty Low-Pressure Fuel Sensor (FLP Sensor) 🔴 High Probability → Shop Fuel Pressure Sensor Ford issued Special Service Message (SSM 48397) for 2013-2015 1.6L GTDI engines due to a high failure rate of this sensor, which can give biased or incorrect readings. This is a very common first point of failure across the 1.6L EcoBoost platform.
   How to confirm: Use a scan tool to monitor the 'Fuel Low Pressure' PID. A faulty sensor may show a reading that is stuck (e.g., 108-109 PSI), reads 0 PSI, or shows 0 volts when plugged in but jumps to 5 volts when unplugged. A healthy sensor should 🎬 Watch: This diagnostic walkthrough shows how to confirm a bad sensor. show pressure fluctuating between ~70-100 PSI depending on load.
   Typical fix: Replace the low-pressure fuel sensor. Access is tight at the rear of the engine. Removing the wiper cowl assembly is recommended for easier access. A 13mm open-end wrench is needed to hold the flats on the fuel line to prevent twisting it while a deep socket (e.g., 15/16") removes the sensor.
   Est. part cost: $50-$100
2. Failing High-Pressure Fuel Pump (HPFP) 🔴 High Probability → Shop Fuel Pump The mechanical, camshaft-driven HPFP is a common wear item on this engine, leading to insufficient pressure under load. Failure of the integrated fuel volume regulator on the pump is also common.
   How to confirm: After confirming the low-pressure system is working correctly, monitor the 'Desired Fuel Rail Pressure' and 'Actual Fuel Rail Pressure' PIDs on a scan tool. If the actual pressure cannot meet the desired pressure during acceleration or shows a large discrepancy at idle (e.g., desired 288 PSI, actual 76 PSI), the HPFP is likely failing.
   Typical fix: Replace the high-pressure fuel pump. It is highly recommended to also replace the cam follower (tappet) that drives the pump at the same time to prevent premature failure of the new pump. An oil change after replacement is also a good practice to remove any fuel that may have contaminated the oil.
   Est. part cost: $200-$550 for the pump, plus ~$30 for the tappet.
🎬 Watch: A detailed guide on replacing the high-pressure fuel pump.
3. Failing In-Tank Low-Pressure Fuel Pump ⚪ Low Probability → Shop Fuel Pump
   How to confirm: This is more likely if code P008A (Low Pressure Fuel System Pressure - Too Low) is present alongside P0087. A fuel pressure gauge can be used to test the output of the in-tank pump directly at the rail feed line. A healthy low-pressure system should show 60-85 PSI.
   Typical fix: Replace the in-tank fuel pump assembly.
   Est. part cost: $150-$350

Rare But Worth Checking

• Clogged Fuel Tank Strainer: The petrol EcoBoost engine does not have a serviceable inline fuel filter, only a strainer on the in-tank pump assembly. While not a common failure, contamination in the fuel tank could restrict flow.
• Faulty Canister Purge Valve (CPV): Ford Recall 18S32 was issued for a faulty CPV that can create excessive vacuum in the fuel tank, leading to stalling and drivability issues. While it typically sets other codes, severe fuel system vacuum could potentially contribute to low-pressure symptoms.
• Leaking/Stuck Open Fuel Injector(s): → Shop Fuel Injector A fuel injector stuck open can cause a drop in rail pressure, leading to a P0087 code. This may also be accompanied by misfire codes, a strong smell of fuel from the exhaust, and fuel contamination of the engine oil.
• Wiring Issue at PCM Connector: In at least one documented case, loose connector pins at the Powertrain Control Module (PCM) harness caused intermittent signals to the fuel pump, resulting in P0087. This is a very rare cause, often following previous repairs where the PCM was disconnected.

Diagnosis Steps

1. Connect an OBD-II scanner and confirm P0087 is present. Check for other related codes like P008A or P00C6.
2. Access the live data stream on the scanner.
3. Monitor the 'Fuel Low Pressure' PID. With the key on and engine off, the pressure should be stable. Watch the reading during idle and while revving the engine. If the reading is stuck (e.g., 109 PSI), erratic, or reads 0, the sensor is suspect.
4. To confirm a bad sensor, unplug its electrical connector. The live data reading should default to a high value (e.g., 113 PSI and 5V). If it does, the sensor is very likely faulty and shorted internally.
5. If the low-pressure sensor and its circuit are good, monitor 'Desired Fuel Rail Pressure' and 'Actual Fuel Rail Pressure'.
6. Safely test drive the vehicle (if possible) or load the engine while stationary. Command high fuel pressure by accelerating. If the actual pressure consistently fails to meet the desired pressure, the High-Pressure Fuel Pump (HPFP) is the primary suspect.
7. Before replacing the HPFP, inspect the cam follower (tappet) for wear or damage. It is a small, inexpensive part that should be replaced with the pump as a rule.
8. Before replacing any parts, visually inspect the fuel lines for any kinks or damage and check the relevant fuses and relays in the engine bay fuse box.

Parts You'll Likely Need

• Low-Pressure Fuel Sensor (OEM #BU5Z-9F972-B (supersedes BU5Z-9F972-A)) — This sensor is a known high-failure item and is the subject of Ford TSB SSM 48397 for causing code P0087.
  Trusted brands: Motorcraft (CM-5250 / BU5Z-9F972-B), Bosch, Standard Motor Products
  OEM price range: $70-$100
  Aftermarket price range: $40-$80
• High-Pressure Fuel Pump (OEM #BM5Z-9350-A) — This is the second most common cause of P0087 after the low-pressure sensor. It is a mechanical pump that wears out over time.
  Trusted brands: Motorcraft (BM5Z-9350-A), Bosch, Delphi (HM10003)
  OEM price range: $400-$550
  Aftermarket price range: $200-$350
• HPFP Cam Follower (Tappet) (OEM #8W9Z6C287A or 5196089) — This critical wear item sits between the camshaft and the HPFP. A worn tappet will prevent the pump from building adequate pressure and can damage a new pump if not replaced. It should always be replaced with the HPFP.
  Trusted brands: Motorcraft
  OEM price range: $25-$40
  Aftermarket price range: $15-$30

Related Codes That Often Appear With This One

• P008A — This code specifically indicates a problem with the low-pressure side of the fuel system. If seen with P0087, it strongly points to a failing in-tank fuel pump or a restriction before the HPFP.
• P00C6 — This code for 'Fuel Rail Pressure Too Low - Engine Cranking' often appears with P0087 and can also be caused by the faulty low-pressure fuel sensor per Ford's TSB.
• P0300-P0304 — These are random or specific cylinder misfire codes. Insufficient fuel pressure can cause a lean running condition, leading to engine misfires.

Technical Service Bulletins (TSBs) & Recalls

• SSM 48397: For 2013-2015 models with 1.6L GTDI engines, this Special Service Message notes that a lack of power, stalling, and DTCs like P0087 can be caused by a biased or failed Fuel Low Pressure (FLP) sensor, which is available to be replaced separately from the fuel line.

Platform-Specific Known Issues

• Recall 18S32 / NHTSA 18V735: Affects 2012-2018 Focus models for a faulty canister purge valve (CPV) that can stick open, causing excessive vacuum in the fuel tank, leading to stalling. While not a direct cause of P0087, it is a related fuel system problem that owners should be aware of.
• Recall 17V-209 / Customer Satisfaction Program 17B32: Related to the 1.6L GTDI engine, this program addresses risks of engine overheating from lack of coolant circulation, which could lead to a cracked cylinder head and pressurized oil leak, posing a fire risk. This highlights the engine's sensitivity to cooling system health.

Mechanic-Grade Diagnostic Values

• Low-Pressure Fuel System (PID) — expected: Fluctuates with load, ~70-100 PSI.. Failure: Stuck at a fixed value (e.g., 108-109 PSI) or reads 0 PSI while running.
• Low-Pressure Fuel System (Mechanical Gauge) — expected: 60-85 PSI, stable at idle.. Failure: Pressure below 60 PSI or unstable readings.
• Low-Pressure Fuel Sensor (Unplugged) — expected: Scan tool PID should default to a high, fixed value (e.g., 113 PSI).. Failure: Reading does not change or remains at 0, indicating a wiring issue or bad PCM.
• Low-Pressure Fuel Sensor Connector (KOEO, unplugged) — expected: 5.0V on the reference wire.. Failure: Voltage is not present, indicating a wiring or PCM issue.
• High-Pressure Fuel System (PID at Idle) — expected: Actual pressure should closely match desired pressure (e.g., ~330-350 PSI).. Failure: Actual pressure is significantly lower than desired (e.g., Actual 76 PSI vs. Desired 288 PSI).

Scan Tool Commands That Help

• FORScan / Ford IDS: PCM Reset / KAM Reset — After replacing a major fuel system component like the HPFP or a sensor, resetting the Keep Alive Memory (KAM) forces the PCM to relearn fuel trims and sensor baselines, which can be essential for resolving the code.
• FORScan / Ford IDS: KOER (Key On, Engine Running) Self-Test — This commands the fuel system through a series of tests to check for pressure response. It may trigger codes that are not present during normal driving, helping to isolate an intermittent fault.

Wiring & Ground Locations

• PCM Connector C175E — The main Powertrain Control Module (PCM) connector, located on the PCM at the left side of the transmission.. The HPFP volume control solenoid is controlled by pins on this connector. Loose or pushed-out pins, sometimes occurring after previous repairs, can cause P0087.
• High-Pressure Fuel Rail Sensor Connector — On the fuel rail on the top of the engine.. This is a 3-wire connector. Pin 1 is 5V Reference, Pin 2 is Signal, and Pin 3 is Ground. Verifying 5V at Pin 1 and a good ground at Pin 3 is a key electrical check.

Real Owner Repair Stories

• Ford Owners Club forum user 'Chad!' (Ford Focus 1.6 EcoBoost (150bhp)) — Sudden loss of power, car entered limp mode and would not rev above 3,000 RPM. Audible ticking from HPFP became much quieter.
  ❌ Tried (didn't work) Initial diagnosis was uncertain due to a basic code reader not connecting properly.
  ✅ What actually fixed it Replacing the high-pressure fuel pump (HPFP) resolved all symptoms. The user noted that the fault codes had to be cleared after replacement before the car would run correctly.
• ScannerDanner Forum user 'Cheryl' (Ford Focus (year/engine not specified, but GDI)) — Long crank time to start and poor acceleration with code P0087.
  ❌ Tried (didn't work) Customer had already replaced the low and high-pressure fuel sensors., Customer had installed a used high-pressure fuel pump., Technician replaced the in-tank fuel pump.
  ✅ What actually fixed it The technician removed the PCM and found two connector pins were pushed out of the socket. The damage had occurred during a previous repair where the PCM was replaced after an accident. Reseating the pins fixed the fuel pressure issue.
• Fiesta ST Forum user (Ford Fiesta ST (shares 1.6L EcoBoost engine)) — P0087 code present.
  ❌ Tried (didn't work) Replacing the low-pressure fuel pump., Replacing the HPFP tappet.
  ✅ What actually fixed it The low-pressure fuel sensor was faulty and stuck reading 108 PSI at all times. Replacing the sensor fixed the issue, with new readings showing a healthy 70-100 PSI.
• NHTSA ODI #11387363 — An owner reported that the vehicle would not give any gas or go over 20 miles, sometimes shutting off and having a hard time driving forward. A diagnostic check revealed codes P0087, P0783, and P2872.
• NHTSA ODI #11165783 — A report describes a Check Engine Light with code P0087 appearing after ignition while stationary. The owner noted the car takes about 5 seconds to start half the time and the turbo is disabled.

OEM Part Supersession History

• BU5Z-9F972-A → BU5Z-9F972-B (also sold as Motorcraft CM-5250) — Standard part revision by Ford, likely for improved reliability.
  Heads up: The newer part is a direct replacement for the older one. A further revised part number, BU5A-9F972-CA, is also mentioned for some EcoBoost applications.

Model Year Variations Within This Range

• 2013-2015: These model years are specifically called out in Ford's Special Service Message (SSM 48397) for having a high failure rate of the low-pressure fuel sensor (FLP Sensor) causing P0087 and other related codes. While the sensor can fail on other years, it is a documented primary cause for this specific range.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• PowerShift DPS6 Automatic Transmission Failure 🔴 High — Extremely common on models equipped with the DPS6 automatic (not the 1.6L EcoBoost which often had a manual or conventional auto). Symptoms include shuddering, jerking, slipping, and complete loss of drive. Onset can be as early as 20,000-30,000 miles. (Ref: Multiple class-action lawsuits and warranty extensions (e.g., to 7 years/100,000 miles) were issued.)
• 1.6L EcoBoost Coolant Intrusion / Overheating 🔴 High — A significant design flaw where coolant can leak into the engine cylinders, causing misfires, white smoke, and eventual catastrophic engine failure. This is due to engine block/head design. (Ref: Ford issued recalls (e.g., 17V209) for some 1.6L GTDI engines for fire risk due to overheating, but coolant intrusion issues persist across many model years.)
• Faulty Canister Purge Valve (CPV) 🟠 Medium — A very common failure where the valve sticks open, causing excessive vacuum in the fuel tank. This leads to engine stalling (especially after refueling), rough idle, and difficulty starting. Can also deform the fuel tank. (Ref: Ford Recall 18S32 / NHTSA 18V735)
• Delphi ECU Malfunctions 🟠 Medium — On Mk3 models (2011-2018), the Delphi-made Engine Control Unit (ECU) is known to fail, causing no-start conditions, cutting out, or various electrical faults.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific repair, using used parts is generally not recommended. The primary failure components (sensors, pumps) are wear items or have known failure rates. A used part may have limited remaining life or could be faulty from the start.

Donor-vehicle mileage cap: roughly under 60000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• For a High-Pressure Fuel Pump (HPFP), avoid any unit that shows signs of corrosion, physical damage, or leaking.
• Verify the donor vehicle was not involved in a front-end collision that could have damaged the engine components.
• If possible, get history on the donor vehicle to see if the part is original or a recent replacement.

OEM-only on this vehicle (don't cheap out):

• Low-Pressure Fuel Sensor: Given the high failure rate and the existence of a TSB, using an OEM (Motorcraft) or OEM-supplier (Bosch) part is strongly advised to ensure the revised, more reliable version is installed.
• High-Pressure Fuel Pump (HPFP): This is a critical, high-stress component. OEM (Motorcraft) or a reputable OEM supplier like Bosch is highly recommended for longevity and performance.
• HPFP Cam Follower (Tappet): This is an inexpensive but critical wear part. Always buy this new from the dealer (Motorcraft) when replacing the HPFP.

Aftermarket brands forum-validated for this vehicle:

• Bosch (Often the OEM manufacturer for Ford fuel components)
• Delphi

Brands owners have reported issues with on this vehicle:

• Unbranded, no-name parts from online marketplaces should be avoided, as their quality and reliability for a high-pressure fuel system are questionable.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• P008A — Low Pressure Fuel System Pressure - Too Low; often appears alongside P0087 if the in-tank low-pressure fuel pump is failing.
• P00C6 — Fuel Rail Pressure Too Low - Engine Cranking; a related fuel pressure code that may be present during the diagnostic process.

Frequently Asked Questions