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Home / DTC / P0087 — Fuel Rail/System Pressure - Too Low Bank 1

P0087 — Fuel Rail/System Pressure - Too Low Bank 1

Detailed page for trouble code P0087.

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Code

P0087

Generic P — Powertrain

Fuel Rail/System Pressure - Too Low Bank 1

Brand: Generic
Type: P — Powertrain
Views: UK: 12 EN: 35 RU: 58
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Low fuel level in tank
  • Failed or weak fuel pump (low supply pressure)
  • Clogged fuel filter or strainer
  • Restriction or leak in fuel supply line
  • Faulty fuel pressure regulator or relief valve
  • Faulty fuel rail pressure sensor (Bank 1) or bad sensor wiring/connectors

Symptoms

  • Check Engine Light (MIL) illuminated
  • Hard starting or no-start condition
  • Loss of power, hesitation, or poor acceleration
  • Engine stalling or rough idle
  • Reduced performance / limp-home mode
  • Possible fuel odor (with leaks) or unusual fuel consumption

What to check

  • Read freeze-frame and freeze data; note conditions when code set (engine load, RPM, temperature, fuel level).
  • Scan live data: fuel rail pressure (bank 1), commanded pressure, fuel pump duty cycle, fuel pump voltage, fuel rail pressure sensor voltage.
  • Compare rail pressure PID to commanded value and to known-good values for the vehicle.
  • Visually inspect fuel lines, connectors, harnesses and ground connections for damage or corrosion.
  • Check fuel tank level and inspect primary/secondary fuel filters for restriction.
  • Check pump relay, fuse and supply voltage to fuel pump with key on and during cranking.

Signal parameters

  • Fuel rail pressure (PID) — value varies by system: typical port‑injected rail ~30–60 psi (2–4 bar); direct injection rails much higher (200–2500+ psi / 15–170+ bar). Consult vehicle spec.
  • Fuel rail pressure sensor voltage — typical range 0.5–4.5 V (varies by sensor).
  • Fuel pump supply voltage — battery voltage (~12 V) with key on/crank; significant voltage drop indicates wiring or supply issue.
  • Fuel pump duty cycle or commanded pressure percentage — indicates PCM command to pump/regulator.
  • Crank/run fuel pressure vs. key-on pressure and pressure while driving under load — use pressure gauge to compare.

Diagnostic algorithm

  1. Retrieve and record freeze-frame, pending codes, and live data for rail pressure and pump control while reproducing the symptom if safe.
  2. Visually inspect fuel system wiring, connectors (sensor and pump), fuses and relays for damage, corrosion, or loose connections.
  3. Verify fuel level; if low, top off and re-test (low tank can cause pump cavitation).
  4. With a calibrated fuel pressure gauge installed at the fuel rail/test port, measure static (key on, engine off), cranking, and running pressure. Compare to spec.
  5. If measured pressure is low: check supply side — inspect/replace fuel filter, check fuel supply line for restriction, measure voltage at fuel pump and monitor current draw if possible.
  6. If supply side OK but rail still low (high‑pressure systems): inspect high‑pressure pump and regulator/relief valve, check for injector leaks or return-line faults, and test high‑pressure pump control (ECM/PCM commands).
  7. Test fuel rail pressure sensor: monitor sensor voltage while applying known pressure (or compare to gauge). Check sensor reference voltage, ground, and signal wiring for opens/shorts. Replace sensor if out of spec.
  8. Check pump relay/control module operation: verify PCM grounding and command signals, and test/replace relay or pump control module as required.
  9. After repairs, clear codes and perform road test under load to confirm rail pressure reaches commanded values and P0087 does not return.
  10. If pressure still low after replacing suspected components, consider PCM or specialized high-pressure pump bench testing and consult manufacturer service information.

Likely causes

  • Clogged fuel filter or debris restricting flow
  • Failed/weak in-tank or high-pressure pump
  • Faulty fuel rail pressure sensor or contaminated sensor reading
  • Faulty pump relay or low supply voltage to pump
  • Fuel return/regulator stuck open causing low rail pressure

Fault status

⚠️ Status
Fuel Rail/System Pressure — Too Low (Bank 1). PCM detected fuel rail pressure below required threshold for bank 1; engine performance may be reduced and limp-home mode may be active.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-4.0 hours

Similar codes

P0088 P0190 P0191 P0192 P0193 P0230
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Code

P0087

ISUZU P — Powertrain

Fuel Rail/System Pressure - Too Low

Brand: ISUZU
Type: P — Powertrain
Views: UK: 12 EN: 26 RU: 43
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Low fuel level in tank
  • Failed or weak fuel pump (low supply pressure)
  • Clogged fuel filter or strainer
  • Restriction or leak in fuel supply line
  • Faulty fuel pressure regulator or relief valve
  • Faulty fuel rail pressure sensor (Bank 1) or bad sensor wiring/connectors

Symptoms

  • Check Engine Light (MIL) illuminated
  • Hard starting or no-start condition
  • Loss of power, hesitation, or poor acceleration
  • Engine stalling or rough idle
  • Reduced performance / limp-home mode
  • Possible fuel odor (with leaks) or unusual fuel consumption

What to check

  • Read freeze-frame and freeze data; note conditions when code set (engine load, RPM, temperature, fuel level).
  • Scan live data: fuel rail pressure (bank 1), commanded pressure, fuel pump duty cycle, fuel pump voltage, fuel rail pressure sensor voltage.
  • Compare rail pressure PID to commanded value and to known-good values for the vehicle.
  • Visually inspect fuel lines, connectors, harnesses and ground connections for damage or corrosion.
  • Check fuel tank level and inspect primary/secondary fuel filters for restriction.
  • Check pump relay, fuse and supply voltage to fuel pump with key on and during cranking.

Signal parameters

  • Fuel rail pressure (PID) — value varies by system: typical port‑injected rail ~30–60 psi (2–4 bar); direct injection rails much higher (200–2500+ psi / 15–170+ bar). Consult vehicle spec.
  • Fuel rail pressure sensor voltage — typical range 0.5–4.5 V (varies by sensor).
  • Fuel pump supply voltage — battery voltage (~12 V) with key on/crank; significant voltage drop indicates wiring or supply issue.
  • Fuel pump duty cycle or commanded pressure percentage — indicates PCM command to pump/regulator.
  • Crank/run fuel pressure vs. key-on pressure and pressure while driving under load — use pressure gauge to compare.

Diagnostic algorithm

  1. Retrieve and record freeze-frame, pending codes, and live data for rail pressure and pump control while reproducing the symptom if safe.
  2. Visually inspect fuel system wiring, connectors (sensor and pump), fuses and relays for damage, corrosion, or loose connections.
  3. Verify fuel level; if low, top off and re-test (low tank can cause pump cavitation).
  4. With a calibrated fuel pressure gauge installed at the fuel rail/test port, measure static (key on, engine off), cranking, and running pressure. Compare to spec.
  5. If measured pressure is low: check supply side — inspect/replace fuel filter, check fuel supply line for restriction, measure voltage at fuel pump and monitor current draw if possible.
  6. If supply side OK but rail still low (high‑pressure systems): inspect high‑pressure pump and regulator/relief valve, check for injector leaks or return-line faults, and test high‑pressure pump control (ECM/PCM commands).
  7. Test fuel rail pressure sensor: monitor sensor voltage while applying known pressure (or compare to gauge). Check sensor reference voltage, ground, and signal wiring for opens/shorts. Replace sensor if out of spec.
  8. Check pump relay/control module operation: verify PCM grounding and command signals, and test/replace relay or pump control module as required.
  9. After repairs, clear codes and perform road test under load to confirm rail pressure reaches commanded values and P0087 does not return.
  10. If pressure still low after replacing suspected components, consider PCM or specialized high-pressure pump bench testing and consult manufacturer service information.

Likely causes

  • Clogged fuel filter or debris restricting flow
  • Failed/weak in-tank or high-pressure pump
  • Faulty fuel rail pressure sensor or contaminated sensor reading
  • Faulty pump relay or low supply voltage to pump
  • Fuel return/regulator stuck open causing low rail pressure

Fault status

⚠️ Status
Fuel Rail/System Pressure — Too Low (Bank 1). PCM detected fuel rail pressure below required threshold for bank 1; engine performance may be reduced and limp-home mode may be active.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-4.0 hours

Similar codes

P0088 P0190 P0191 P0192 P0193 P0230
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0087

LAND ROVER P — Powertrain

Fuel System / Rail Pressure - Too Low

Brand: LAND ROVER
Type: P — Powertrain
Views: UK: 4 EN: 9 RU: 32
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Low fuel level in tank
  • Failed or weak fuel pump (low supply pressure)
  • Clogged fuel filter or strainer
  • Restriction or leak in fuel supply line
  • Faulty fuel pressure regulator or relief valve
  • Faulty fuel rail pressure sensor (Bank 1) or bad sensor wiring/connectors

Symptoms

  • Check Engine Light (MIL) illuminated
  • Hard starting or no-start condition
  • Loss of power, hesitation, or poor acceleration
  • Engine stalling or rough idle
  • Reduced performance / limp-home mode
  • Possible fuel odor (with leaks) or unusual fuel consumption

What to check

  • Read freeze-frame and freeze data; note conditions when code set (engine load, RPM, temperature, fuel level).
  • Scan live data: fuel rail pressure (bank 1), commanded pressure, fuel pump duty cycle, fuel pump voltage, fuel rail pressure sensor voltage.
  • Compare rail pressure PID to commanded value and to known-good values for the vehicle.
  • Visually inspect fuel lines, connectors, harnesses and ground connections for damage or corrosion.
  • Check fuel tank level and inspect primary/secondary fuel filters for restriction.
  • Check pump relay, fuse and supply voltage to fuel pump with key on and during cranking.

Signal parameters

  • Fuel rail pressure (PID) — value varies by system: typical port‑injected rail ~30–60 psi (2–4 bar); direct injection rails much higher (200–2500+ psi / 15–170+ bar). Consult vehicle spec.
  • Fuel rail pressure sensor voltage — typical range 0.5–4.5 V (varies by sensor).
  • Fuel pump supply voltage — battery voltage (~12 V) with key on/crank; significant voltage drop indicates wiring or supply issue.
  • Fuel pump duty cycle or commanded pressure percentage — indicates PCM command to pump/regulator.
  • Crank/run fuel pressure vs. key-on pressure and pressure while driving under load — use pressure gauge to compare.

Diagnostic algorithm

  1. Retrieve and record freeze-frame, pending codes, and live data for rail pressure and pump control while reproducing the symptom if safe.
  2. Visually inspect fuel system wiring, connectors (sensor and pump), fuses and relays for damage, corrosion, or loose connections.
  3. Verify fuel level; if low, top off and re-test (low tank can cause pump cavitation).
  4. With a calibrated fuel pressure gauge installed at the fuel rail/test port, measure static (key on, engine off), cranking, and running pressure. Compare to spec.
  5. If measured pressure is low: check supply side — inspect/replace fuel filter, check fuel supply line for restriction, measure voltage at fuel pump and monitor current draw if possible.
  6. If supply side OK but rail still low (high‑pressure systems): inspect high‑pressure pump and regulator/relief valve, check for injector leaks or return-line faults, and test high‑pressure pump control (ECM/PCM commands).
  7. Test fuel rail pressure sensor: monitor sensor voltage while applying known pressure (or compare to gauge). Check sensor reference voltage, ground, and signal wiring for opens/shorts. Replace sensor if out of spec.
  8. Check pump relay/control module operation: verify PCM grounding and command signals, and test/replace relay or pump control module as required.
  9. After repairs, clear codes and perform road test under load to confirm rail pressure reaches commanded values and P0087 does not return.
  10. If pressure still low after replacing suspected components, consider PCM or specialized high-pressure pump bench testing and consult manufacturer service information.

Likely causes

  • Clogged fuel filter or debris restricting flow
  • Failed/weak in-tank or high-pressure pump
  • Faulty fuel rail pressure sensor or contaminated sensor reading
  • Faulty pump relay or low supply voltage to pump
  • Fuel return/regulator stuck open causing low rail pressure

Fault status

⚠️ Status
Fuel Rail/System Pressure — Too Low (Bank 1). PCM detected fuel rail pressure below required threshold for bank 1; engine performance may be reduced and limp-home mode may be active.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-4.0 hours

Similar codes

P0088 P0190 P0191 P0192 P0193 P0230
Workshop Manuals

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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)

Workshop Manual
Defender 300Tdi Years: 1996 Manual in English 7.5 MB
Short description

Official workshop manual for the Land Rover Defender 300Tdi (from 1996 model year). Contains specifications, adjustment, fault diagnosis and step-by-step repair and overhaul procedures for engine, transmission, axles, suspension, brakes, electrical and body. Intended for dealer workshops and trained technicians.

Contents
Key sections:
  • 01 INTRODUCTION
  • 04 GENERAL SPECIFICATION DATA
  • 05 ENGINE TUNING DATA
  • 07 GENERAL FITTING REMINDERS
  • 09 LUBRICANTS, FLUIDS AND CAPACITIES
  • 10 MAINTENANCE
  • 12 ENGINE Tdi
  • - Description and operation
  • - Fault diagnosis
  • - Adjustment
  • - Repair and overhaul procedures
  • 19 FUEL SYSTEM Tdi
Download

Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)

Workshop Manual
Defender Years: 1999–2002 Manual in English 7.6 MB
Short description

Workshop Manual Supplement and Body Repair Manual for the Land Rover Defender. Includes general specifications, maintenance schedules, tuning data and step‑by‑step repair procedures for engine, transmission, suspension, brakes, electrical and body repairs. Covers Defender models from 1999 and 2002 model years.

Contents
Key sections:
  • 01 - INTRODUCTION
  • - Introduction
  • - Dimensions
  • - References
  • - Repairs and replacements
  • - Poisonous substances
  • - Fuel handling precautions
  • - Synthetic rubber
  • - Recommended sealants
  • - Used engine oil precautions
  • - Accessories and conversions
  • - Wheels and tyres
Download

Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)

Workshop Manual
Manual in English Pages: 494 7.1 MB
Short description

Land Rover Range Rover Electrical Library (LRL 0453ENG). Comprehensive manual covering fuse details, earth points, system descriptions, diagnostics and connector pin-outs for electrical troubleshooting and repair. Intended for technicians and service workshops.

Contents
Key sections:
  • 1 INTRODUCTION
  • 1.1 About this document
  • 1.2 Battery voltage
  • 1.3 Electrical precautions
  • 1.4 Battery disconnecting / charging
  • 1.5 Disciplines / greases
  • 1.6 Abbreviations
  • 1.7 HeVAC, sensors abbreviations
  • 1.8 How to use this document
  • 1.9 Connector detail format
  • 1.10 Fault diagnosis
  • 1.11 Wire colour codes
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