P0087 on 2013-2019 Land Rover Range Rover: Low Fuel Rail Pressure Causes & Fixes

What's Unique About the 2013-2019 Land Rover RANGE ROVER

The V6 and V8 supercharged engines in the L405 Range Rover use a complex fuel system with two camshaft-driven high-pressure fuel pumps (HPFPs), not just one. This dual-pump setup is a well-documented common failure point and a primary cause for the P0087 code 🎬 Watch: A breakdown of P0087 causes and common fixes. on this platform. Misdiagnosing the issue is easy; owners might replace the in-tank low-pressure pump or only one of the two high-pressure pumps, leading to a recurring problem. TSB #SSM74336 was issued specifically for the 3.0L TDV6 diesel engine, noting that P0087 can be triggered by misfuelling or contaminated fuel, and advises investigation before replacing parts.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this vehicle.

Symptoms You May Notice

• "Restricted Performance" warning light on the dashboard.
• Check Engine Light is on.
• Engine hesitation or stumbling, especially during acceleration or under load.
• Difficulty starting the engine or long crank times.
• Engine stalling, sometimes unexpectedly while driving.
• Rough or erratic idle, with RPMs bouncing.
• Noticeable loss of engine power.
• Unresponsive or 'flat' gas pedal feel before stalling.

Most Likely Causes

1. Failing High-Pressure Fuel Pumps (HPFPs) 🔴 High Probability The dual HPFPs on the V6 and V8 gasoline engines are a known high-failure item. They are mechanical and wear out over time, often failing in tandem.
   How to confirm: Use a diagnostic scanner (like the GAP IIDTool or JLR SDD) to monitor actual vs. desired fuel rail pressure under load. A significant drop in actual pressure during acceleration points to the HPFPs. A professional test with Land Rover's SDD software is the most definitive method, as it can isolate and test each pump individually.
   Typical fix: Replace both high-pressure fuel pumps 🎬 See this walkthrough on diagnosing HPFP and camshaft issues. and their associated tappets/followers. It is critical to replace them as a pair.
   Est. part cost: $400-$800 for a pair of OEM-quality pumps (e.g., Bosch).
2. Faulty Fuel Rail Pressure Sensor 🟡 Medium Probability The sensor can fail and send incorrect low-pressure readings to the PCM, tricking it into triggering P0087 even if the pressure is mechanically sound. TSB #SSM74336 specifically mentions sensor-related P0087 codes on diesel models.
   How to confirm: Compare the live sensor data on a scan tool to a reading from a mechanical pressure gauge connected to the low-pressure system's Schrader valve. If the readings differ significantly or the scan tool shows an impossibly low value (e.g., near zero PSI with the engine running), the sensor is likely faulty.
   Typical fix: Replace the fuel rail pressure sensor. On many models, this is a relatively accessible and quick DIY job.
   Est. part cost: $50-$150
3. Clogged Fuel Filter 🟡 Medium Probability
   How to confirm: The fuel filter is part of the low-pressure system. If low-pressure fuel delivery is below the 60-75 PSI specification, a clogged filter is a prime suspect. This should be checked before condemning expensive pumps, especially if service history is unknown.
   Typical fix: Replace the fuel filter. This is a routine maintenance item that is often overlooked.
   Est. part cost: $40-$100
4. Failing Low-Pressure Fuel Pump (In-tank) ⚪ Low Probability
   How to confirm: Test the fuel pressure from the in-tank pump before it reaches the HPFPs. The pressure should be stable and within the manufacturer's specification (typically 60-75 PSI). A significant drop below this range indicates a failing in-tank pump.
   Typical fix: Replace the in-tank low-pressure fuel pump assembly.
   Est. part cost: $200-$500

Rare But Worth Checking

• Leaking Fuel Injectors: A leaking injector can cause a drop in rail pressure. This would often be accompanied by misfire codes (P0300-P0308) for a specific cylinder and potentially a smell of fuel in the oil.
• Contaminated Fuel (Diesel): As per TSB SSM74336, water or other contaminants in the diesel fuel can cause P0087. The bulletin advises draining water from the fuel filter and inspecting the HPFP for corrosion or debris.
• Wiring Harness Issues: Damage to the wiring for the fuel pumps or pressure sensor can cause erratic signals and trigger the code. This can be due to chafing or heat damage.
• Low System Voltage / Failing Alternator: Some owners have reported that an intermittent charging fault or a failing battery can cause P0087. If the system voltage drops too low (e.g., below 12V while running), it may not be sufficient to properly operate the fuel pumps and their control modules.

Diagnosis Steps

1. Connect an OBD-II scanner and confirm the P0087 code is present. Note any other codes, such as misfires (P030x) or sensor circuit codes.
2. Use a scanner with live data capabilities to monitor 'Desired Fuel Rail Pressure' and 'Actual Fuel Rail Pressure'.
3. At idle, observe the pressure. It should be stable and actual should match desired.
4. Safely test drive the vehicle while monitoring the live data. Under hard acceleration, the actual pressure should closely follow the desired pressure. A significant drop or lag in actual pressure points to a fuel delivery problem.
5. First, rule out simple fixes. If service history is unknown, replace the fuel filter.
6. Some owners have reported temporary success using a quality fuel system cleaner like BG 44K, which may help with minor restrictions or dirty sensors.
7. Test the low-pressure fuel system. Connect a mechanical gauge to the low-pressure line's Schrader valve and verify pressure is a stable 60-75 PSI. If not, the in-tank pump or filter is suspect.
8. If the low-pressure system is healthy, the issue is likely in the high-pressure system. Inspect the fuel rail pressure sensor and its wiring. Compare its live data reading to the mechanical gauge to check for discrepancies.
9. If the sensor is good, the high-pressure fuel pumps are the most likely culprits. For a definitive diagnosis, use JLR's SDD software to run the high-pressure system test, which can isolate each pump.
10. Before replacement, inspect the HPFPs and their drive lobes (tappets) for wear. Also check the engine oil for the smell of fuel, which could indicate a leaking pump seal.

Parts You'll Likely Need

• High-Pressure Fuel Pump (OEM #LR081595 (supersedes LR035527)) — This is the most common failure point for code P0087 on the V6 and V8 supercharged engines. The vehicle uses two of them and they should be replaced as a pair.
  Trusted brands: Bosch, Land Rover (Genuine)
  OEM price range: $300-$450 each
  Aftermarket price range: $200-$300 each
• Fuel Rail Pressure Sensor (OEM #LR044707 / AJ812513) — This sensor can fail and send incorrect low-pressure readings, triggering the code. It's a common cause and is mentioned in a TSB.
  Trusted brands: Bosch, Delphi
  OEM price range: $100-$180
  Aftermarket price range: $50-$90
• Fuel Filter — A clogged filter restricts fuel flow from the tank, starving the high-pressure pumps. It's a critical maintenance part to check first.
  Trusted brands: Mahle, Bosch, Mann-Filter
  OEM price range: $70-$120
  Aftermarket price range: $40-$80

Related Codes That Often Appear With This One

• P0088 — Stands for 'Fuel Rail/System Pressure - Too High'. Seeing both codes can indicate an erratic fuel rail pressure sensor or a faulty fuel pressure regulator.
• P0300-P0308 — Misfire codes for one or more cylinders. Insufficient fuel pressure can lead to a lean condition, causing the engine to misfire.
• P00C6 — Stands for 'Fuel Rail Pressure Too Low - Engine Cranking'. This code specifically points to a lack of pressure during startup, often strengthening the case for failing HPFPs.

Technical Service Bulletins (TSBs) & Recalls

• SSM74336: For 3.0L TDV6 & AJ20D diesel engines, variations of DTC P0087 can be stored due to contaminated fuel or misfuelling, and investigation is required before parts replacement.

Platform-Specific Known Issues

• TSB SSM74336 - Diesel Engine Specifics — For the 3.0L TDV6, Land Rover issued TSB #SSM74336 which directly addresses DTC P0087. It highlights that misfuelling (putting gasoline in a diesel tank) or fuel contamination (e.g., with water) are potential triggers. The bulletin advises technicians to investigate these possibilities by draining the fuel filter water separator and inspecting the high-pressure pump for damage before replacing any components.

Mechanic-Grade Diagnostic Values

• Low-Pressure Fuel System (In-tank pump) — expected: Should prime to ~105 PSI on key-on or door open, then stabilize to 65-79 PSI after the engine is running and warmed up.. Failure: Pressure significantly below 65 PSI at idle, or failure to prime to over 100 PSI, indicates a weak in-tank pump or clogged filter.
• High-Pressure Fuel System (HPFPs) — expected: Should show at least 2,000 PSI on a cold start, then settle to ~500-580 PSI at warm idle. Under load (e.g., 3,000 RPM or hard acceleration), it should quickly rise to and maintain 1,900-2,900 PSI.. Failure: Failure to reach at least 1,900 PSI under load, or a significant lag between desired and actual pressure, points to failing HPFPs, worn followers, or a leak.
• System Voltage — expected: Should be stable above 13.5V while the engine is running.. Failure: An intermittent charging system that allows voltage to drop below 12V while running can trigger P0087, as the fuel pump modules may not receive enough power to operate correctly.

Scan Tool Commands That Help

• JLR SDD (Symptom Driven Diagnostics) or Pathfinder: Fuel System - Pressure Test — This is a guided diagnostic routine to use after verifying the low-pressure system is healthy. It runs a series of automated tests on the high-pressure pumps and sensors to pinpoint a component failure, which is more definitive than just observing live data during a drive.
• JLR SDD or high-end generic scanner: Fuel Pump Prime / Activation — This bidirectional command allows the technician to activate the in-tank low-pressure fuel pump without starting the engine. It is used to verify the pump is functional and to make it easier to measure low-side pressure at the Schrader valve.

Wiring & Ground Locations

• Fuel Pump Control Module (FPCM) / Generator Control Module (GCM) — Located in the right-hand rear quarter panel area, often behind the trim or near the rear fuse box.. This module controls the voltage to the in-tank low-pressure fuel pump. A failure in this module, its wiring, or its ground connection can starve the high-pressure pumps of fuel, directly causing P0087. Its location makes it susceptible to water ingress or corrosion if there are any leaks in the rear of the vehicle.

Real Owner Repair Stories

• Reddit user on r/RangeRover (2016 Range Rover TD6, 113k miles) — Check Engine Light with P0087.
  ❌ Tried (didn't work) Initial diagnosis pointed towards the high-pressure fuel pump (CP4).
  ✅ What actually fixed it The owner first replaced the fuel filter, which did not solve the issue. The final fix was replacing one of the fuel rails which comes with an integrated sensor that had failed. The total repair cost was $1600 at an independent shop.
• Land Rover Forums user (2013 Range Rover SCV8 (5.0L Supercharged)) — P0087, very rough cold start, black smoke, backfiring, stalling, and significant loss of power.
  ❌ Tried (didn't work) Replacing both high-pressure fuel pumps (HPFPs) and their buckets (followers)., Replacing the fuel rail pressure sensor., Checking wiring from HPFPs to the ECU.
  ✅ What actually fixed it The user eventually discovered the issue was not the pumps themselves, but extreme wear on the camshaft lobes that drive the high-pressure fuel pumps. The worn lobes were not providing the necessary lift to operate the pumps correctly, leading to low pressure despite having new pumps installed. The ultimate fix required camshaft replacement.

OEM Part Supersession History

• LR035527 → LR081595 — Manufacturer revision for improved reliability or sourcing changes.
  Heads up: LR081595 is the correct current replacement for vehicles originally equipped with LR035527.

Model Year Variations Within This Range

• 2018-2019: The 2018 model year brought a significant facelift to the L405 Range Rover, including updated infotainment (Touch Pro Duo) and revised styling. While the core 3.0L V6 and 5.0L V8 gasoline engines remained, some powertrain software and control modules may have been updated. A recall (N138) was issued for some 2018 2.0L gasoline engines (not the V6/V8) for a fuel rail leak, but this is a separate issue from the P0087 causes discussed here.