P069E OBD-II: Fuel Pump Control Module Requested MIL Illumination

What does code P069E mean?

Code P069E stands for Fuel Pump Control Module (FPCM) Requested MIL Illumination.

The fuel pump control module (FPCM) is the computer that monitors the operation of the fuel system. It receives input regarding desired fuel pressure from the engine control module (ECM). The FPCM uses this information to determine control of the tank-mounted fuel pump. A fuel pressure sensor (FPS) is used to provide the FPCM with fuel pressure feedback.

Code P069E indicates the FPCM has detected a problem with the fuel system and has sent a request to the ECM to turn on the check engine light. The check engine light is also known as the malfunction indicator lamp (MIL).

Fuel tank

P069E symptoms

• An illuminated check engine light
• Engine performance problems

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Common causes for P069E

Code P069E is typically caused by one of the following:

• A faulty fuel pump
• A failed fuel pressure sensor
• A bad fuel pressure relay
• Wiring problems
• A problem with the FPCM or ECM

How to diagnose and repair P069E

Perform a preliminary inspection

Sometimes P069E can pop up intermittently, or it can result from a dead battery. This is especially true if the code is a history code and not current. Clear the code and see if it returns. If it does, the next step is to perform a visual inspection. A trained eye can check for issues such as broken wires and loose connections. If a problem is found, the issue should be repaired and the code cleared. If nothing is discovered, check for technical service bulletins (TSBs). TSBs are recommended diagnostic and repair procedures put out by the vehicle manufacturer. Finding a related TSB can greatly reduce diagnostic time.

Check the fuel pressure

After a preliminary inspection, a technician will usually check fuel pressure. Actual and desired fuel pressure can be checked using a diagnostic scan tool, connected to the vehicle’s diagnostic port. Desired pressure is what the ECM is requesting and actual is the pressure read by the FPS. Should the two values not match, fuel pressure should be checked with a mechanical gauge. If the mechanical gauge shows fuel pressure is within spec, yet the scan tool shows it is not, a problem with the FPS or its circuit is likely.

However, if the mechanical gauge verifies fuel pressure is not within specification, the fuel pump and its circuit will need to be checked. This is especially true if the and/or the fuel pump is not heard priming when the ignition is turned on.