U067E

Lost Communication With Fuel Pump Control Module

U067E is a generic OBD-II network diagnostic trouble code: Lost Communication With Fuel Pump Control Module. It is logged by the engine control unit when the network monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
U067E
Group
Network
System
Network
Severity
Critical (limp mode / no-start)
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What U067E means

DTC U067E is stored when the primary control module (typically the ECM or PCM) loses communication with the Fuel Pump Control Module (FPCM) over the vehicle's CAN network. The FPCM regulates fuel pump speed and pressure on demand from the ECM; when communication is interrupted, the ECM can no longer request the appropriate fuel delivery, which can result in a no-start condition or engine stall.

Modern vehicles use a dedicated FPCM to allow variable fuel pump operation, improving efficiency. This module is typically located near the fuel tank and can be exposed to heat, vibration, and moisture. Connector corrosion and chafed wiring in the rear harness are common failure points. A fault affecting the CAN bus segment shared by the FPCM can also set this code alongside other network communication DTCs.

Because loss of communication with the FPCM directly affects fuel supply, this fault is treated as critical. The vehicle may start and run briefly on residual fuel rail pressure but will stall once pressure drops. Technicians should restore communication or confirm manual fuel delivery is possible before assuming a mechanical fuel pump failure.

Common causes

Most-frequently reported root causes when U067E is logged.

  • 1
    Failed Fuel Pump Control Module.
  • 2
    Open or shorted CAN bus wiring between the ECM and FPCM.
  • 3
    Blown fuse or failed relay supplying the FPCM.
  • 4
    Poor or corroded ground connection at the FPCM.
  • 5
    Damaged or loose connector at the FPCM, often due to rear-harness chafing.
  • 6
    CAN bus fault caused by another module dragging the bus low or high.
  • 7
    Internal FPCM firmware or processor failure.

Symptoms drivers notice

Engine cranks but will not start, or stalls shortly after starting.
Fuel pump does not prime when the ignition is switched on.
MIL illuminated with U067E stored.
Fuel pressure unavailable or very low at the fuel rail.
Other network DTCs may be present if the CAN bus segment is compromised.

How to diagnose U067E

A typical diagnostic flow when this code is present.

  1. 1
    Retrieve all DTCs from all modules to determine whether the fault is isolated to the FPCM or part of a broader network issue.
  2. 2
    Verify fuel pump prime by listening at the fuel tank when the ignition is cycled; absence of the pump running suggests loss of FPCM control.
  3. 3
    Check fuse and relay supplying the FPCM and verify battery voltage is present at the module.
  4. 4
    Inspect the FPCM connector and harness for corrosion, moisture intrusion, or chafed wiring, particularly where the harness passes near the rear axle or fuel tank.
  5. 5
    Measure CAN bus differential signal at the FPCM connector to confirm the module is receiving a valid network signal.
  6. 6
    Attempt module-level communication with a scan tool; if no response, confirm power and ground before replacing.
  7. 7
    Replace the FPCM if all wiring and network conditions are confirmed normal and the module remains non-communicative.

Related network codes

Frequently asked questions

Will the engine run at all with U067E active?

It may start briefly on residual fuel rail pressure but will stall once that pressure bleeds down. Treat this as a no-start-capable fault and address it before driving.

Is U067E always a module failure?

No. Wiring faults, fuse failures, and CAN bus problems are frequent causes. Diagnose the network and power supply before replacing the FPCM.

Can U067E be caused by a bad ground?

Yes. The FPCM relies on a solid chassis ground. A high-resistance or open ground can prevent proper communication and module operation.

Does clearing U067E restore fuel pump operation?

Only if the root cause was a transient fault. If the underlying wiring or module fault persists, the code will return and fuel delivery will remain compromised.

Disabling U067E in software

RaceTune can permanently disable U067E — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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