What Does P008A Mean?
The ECM has detected that the low-pressure fuel system (typically the in-tank or transfer pump circuit) is delivering pressure below the minimum acceptable threshold. This code is specific to vehicles with separate low-pressure and high-pressure fuel systems, commonly GDI and diesel platforms. The driver may experience extended cranking, rough idle, misfires under load, or engine stalling.
Safety Warning
Driving is not recommended. Insufficient low-pressure fuel supply starves the high-pressure pump, leading to severe misfires and potential stalling. Catalytic converter damage from unburned fuel is also a concern. If the engine stalls in traffic, it presents a significant safety hazard.
Common Causes
35%
Weak or failing low-pressure (in-tank) fuel pump not generating adequate transfer pressure
25%
Clogged fuel filter or in-tank strainer restricting fuel flow
18%
Fuel supply line leak or restriction between tank and high-pressure pump
12%
Faulty fuel pump driver module or control circuit providing insufficient voltage
10%
Faulty low-pressure fuel pressure sensor giving inaccurate readings
Diagnostic Steps
1
Monitor the low-pressure fuel system pressure PID at idle and under load. Typical low-pressure supply spec is 50–75 PSI for GDI systems. Compare actual vs. desired values.
2
Check for fuel pump voltage at the pump connector or driver module. The pump should receive close to battery voltage (or variable voltage on PWM-controlled systems). Low voltage means a wiring or module issue.
3
Inspect the fuel filter and in-tank strainer. A restricted strainer is a very common cause on higher-mileage vehicles. Replace if contaminated or if maintenance history is unknown.
4
Perform a fuel volume delivery test by disconnecting the line at the high-pressure pump inlet and measuring flow into a graduated container. Minimum spec is typically 750 mL in 30 seconds.
5
Check all fuel supply lines and quick-connect fittings for leaks, kinks, or restrictions. Even small air leaks in the supply side can cause low pressure readings.
Estimated Repair Cost
$250 - $1,200
Parts + labor, varies by vehicle and location
The ECM has detected that the low-pressure fuel system (typically the in-tank or transfer pump circuit) is delivering pressure below the minimum acceptable threshold. This code is specific to vehicles with separate low-pressure and high-pressure fuel systems, commonly GDI and diesel platforms. The d...
The most common cause of P008A (Low Pressure Fuel System Pressure - Too Low) is: Weak or failing low-pressure (in-tank) fuel pump not generating adequate transfer pressure
Typical repair costs for P008A range from $250 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Driving is not recommended. Insufficient low-pressure fuel supply starves the high-pressure pump, leading to severe misfires and potential stalling. Catalytic converter damage from unburned fuel is also a concern. If the engine stalls in traffic, it presents a significant safety hazard.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P008A to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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