Code
P008A
Generic
P — Powertrain
Low Pressure Fuel System Pressure - Too Low
Views:
UK: 18
EN: 30
RU: 71
AI status
Completed
Completed
100%
Causes
- Failed or weak low-pressure (lift/supply) fuel pump or pump module
- Clogged or restricted fuel filter or pickup sock/strainer
- Restricted fuel lines or collapsed supply hose
- Faulty fuel pressure sensor (low-pressure sensor) or wiring/connectors
- Faulty fuel pressure regulator or return restriction (return-system vehicles)
- Fuel leak in supply or return causing pressure loss
Symptoms
- MIL (Check Engine) illuminated
- Hard or long cranking, difficulty starting
- Loss of power, poor acceleration or hesitation under load
- Stalling at idle or during acceleration
- Rough idle or misfire-like symptoms
- Fuel odor or visible leak in severe cases
What to check
- Read DTC details and freeze frame data with a scan tool to capture engine load, RPM and temperature at time of fault
- Check live data: low-pressure sensor reading versus expected values and fuel pump commanded status
- Visually inspect fuel lines, connections, filter, tank pickup and tank for damage or leaks
- Check fuel pump supply voltage and ground with key ON/engine cranking
- Inspect/replace fuel filter if service interval due or suspected restriction
- Use a calibrated fuel pressure gauge (inline or at rail/sensor) to measure low-side pressure under key ON and during cranking and run conditions
Signal parameters
- Typical low-pressure feed ranges (examples): gasoline returnless systems ~2.0–4.5 bar (30–65 psi); return systems and diesel lift pumps vary — verify OEM spec
- Trigger condition: low-pressure sensor reports pressure below PCM-specified threshold for the measured operating condition
- Expected behavior: pump commanded ON when pressure low; pressure should rise quickly to target when pump is energized
- Look for rapid pressure drop when pump is off (indicates leak or regulator/return problem)
Diagnostic algorithm
- Verify and record freeze frame and live data for low-pressure fuel sensor and pump command. Reproduce fault if safe. 2) Inspect fuel lines, filter, tank pickup and visible components for restriction, kinks, damage or leaks; repair as needed. 3) Check fuses, relays and wiring to fuel pump; verify proper supply voltage and good ground at the pump with key ON and while cranking. 4) Measure low-side fuel pressure with a mechanical gauge at the recommended test port: record key ON, cranking and idle/run values and compare to OEM spec. 5) If pressure is low, test fuel filter/reservoir and replace filter; clear code and retest. 6) If still low, bench or apply power to the low-pressure pump (if accessible) to confirm pump flow/pressure. 7) Inspect/replace fuel pressure sensor if readings differ from gauge or if sensor wiring shows open/short. 8) Check fuel pressure regulator/return path for restriction (if applicable) and verify correct return flow. 9) Repair or replace failed components (pump, filter, sensor, lines, regulator) and verify repair by confirming stable pressure under all conditions and absence of code. 10) Clear DTCs and perform road test under similar load conditions to confirm resolution.
Likely causes
- Clogged fuel filter or restricted pickup
- Failing/weak in-tank or inline lift pump
- Electrical problem to lift pump (fuse, relay, connector, ground)
- Restricted return or stuck regulator (if applicable)
- Faulty low-pressure fuel sensor or its wiring
Fault status
Status
Fuel system low-pressure measured below expected threshold; PCM set P008A indicating insufficient supply-side fuel pressure or sensor/signal fault.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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Code
P008A
LAND ROVER
P — Powertrain
Low pressure fuel system - Pressure very low
Views:
UK: 7
EN: 21
RU: 54
AI status
Completed
Completed
100%
Causes
- Failed or weak low-pressure (lift/supply) fuel pump or pump module
- Clogged or restricted fuel filter or pickup sock/strainer
- Restricted fuel lines or collapsed supply hose
- Faulty fuel pressure sensor (low-pressure sensor) or wiring/connectors
- Faulty fuel pressure regulator or return restriction (return-system vehicles)
- Fuel leak in supply or return causing pressure loss
Symptoms
- MIL (Check Engine) illuminated
- Hard or long cranking, difficulty starting
- Loss of power, poor acceleration or hesitation under load
- Stalling at idle or during acceleration
- Rough idle or misfire-like symptoms
- Fuel odor or visible leak in severe cases
What to check
- Read DTC details and freeze frame data with a scan tool to capture engine load, RPM and temperature at time of fault
- Check live data: low-pressure sensor reading versus expected values and fuel pump commanded status
- Visually inspect fuel lines, connections, filter, tank pickup and tank for damage or leaks
- Check fuel pump supply voltage and ground with key ON/engine cranking
- Inspect/replace fuel filter if service interval due or suspected restriction
- Use a calibrated fuel pressure gauge (inline or at rail/sensor) to measure low-side pressure under key ON and during cranking and run conditions
Signal parameters
- Typical low-pressure feed ranges (examples): gasoline returnless systems ~2.0–4.5 bar (30–65 psi); return systems and diesel lift pumps vary — verify OEM spec
- Trigger condition: low-pressure sensor reports pressure below PCM-specified threshold for the measured operating condition
- Expected behavior: pump commanded ON when pressure low; pressure should rise quickly to target when pump is energized
- Look for rapid pressure drop when pump is off (indicates leak or regulator/return problem)
Diagnostic algorithm
- Verify and record freeze frame and live data for low-pressure fuel sensor and pump command. Reproduce fault if safe. 2) Inspect fuel lines, filter, tank pickup and visible components for restriction, kinks, damage or leaks; repair as needed. 3) Check fuses, relays and wiring to fuel pump; verify proper supply voltage and good ground at the pump with key ON and while cranking. 4) Measure low-side fuel pressure with a mechanical gauge at the recommended test port: record key ON, cranking and idle/run values and compare to OEM spec. 5) If pressure is low, test fuel filter/reservoir and replace filter; clear code and retest. 6) If still low, bench or apply power to the low-pressure pump (if accessible) to confirm pump flow/pressure. 7) Inspect/replace fuel pressure sensor if readings differ from gauge or if sensor wiring shows open/short. 8) Check fuel pressure regulator/return path for restriction (if applicable) and verify correct return flow. 9) Repair or replace failed components (pump, filter, sensor, lines, regulator) and verify repair by confirming stable pressure under all conditions and absence of code. 10) Clear DTCs and perform road test under similar load conditions to confirm resolution.
Likely causes
- Clogged fuel filter or restricted pickup
- Failing/weak in-tank or inline lift pump
- Electrical problem to lift pump (fuse, relay, connector, ground)
- Restricted return or stuck regulator (if applicable)
- Faulty low-pressure fuel sensor or its wiring
Fault status
Status
Fuel system low-pressure measured below expected threshold; PCM set P008A indicating insufficient supply-side fuel pressure or sensor/signal fault.
Repair difficulty: Medium
Diagnostic time: 1.0-3.0 hours
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