P008A - Low Fuel Pressure Fuel System Pressure - Too Low

When Monitored and Set Conditions

When Monitored: This diagnostic runs continuously when the following conditions are met:
• With the engine running.

Set Conditions:
• The Powertrain Control Module (PCM) detects that the Low Pressure Fuel Delivery pressure is below a calibrated value for a calibrated amount of time.

Default Actions:
• The MIL is illuminated.

Possible Causes

HIGH PRESSURE FUEL DELIVERY
LOW PRESSURE FUEL DELIVERY

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTCBased Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

Diagnostic Test

1. OTHER DTCS

1. Ignition on, engine not running.
2. With the scan tool, read DTCs.
Are there any other DTCs related to Fuel Pressure?

Yes
• Perform the diagnostics for those DTCs before proceeding with this one.

No

• Go To 2

2. ACTIVE DTC

1. With the scan tool, record all Freeze frame data.
2. With the scan tool, erase DTCs.
3. Turn the ignition off for 75 seconds.
4. Turn the ignition on.
5. With the scan tool, read DTCs.
Did DTC P008A reset?

Yes
• Go To 3

No
• Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

3. CHECK THE FUEL DELIVERY SYSTEM

1. (Refer to 29 - Non-DTC Diagnostics/Drivability - Diesel - Diagnosis and Testing) and perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure.
Were any problems found?

Yes
• Repairs are complete.
• Perform the POWERTRAIN VERIFICATION TEST - 6.7L. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No
• Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).