ShopBaseComplete shop management for auto repair shops · $249/mo
Try ShopBase →
Home/DTC Codes/Lincoln/MKX/2018-2018 3.7L V6/P0628
P0628

Fuel Pump A Control Circuit Low

2018-2018 Lincoln MKX 3.7L V6

High SeverityPowertrainGeneric (SAE)

The 2018 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed p0628 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

Low voltage in fuel pump control circuit.

Symptoms

  • No start
  • Weak fuel pump

Common Causes

  • Short to ground
  • Corroded wiring
  • Bad relay

Diagnostic Steps

  1. Test voltage
  2. Check for shorts
  3. Test relay

Repair Notes

Repair wiring or replace relay.

Related Codes

P0627Fuel Pump A Control Circuit/OpenP0629Fuel Pump A Control Circuit High

Other Powertrain Codes

P0628 on Other Vehicles

Lincoln Aviator

2003-2003 4.6L V8 DOHC

Lincoln Aviator

2004-2004 4.6L V8 DOHC

Lincoln Aviator

2005-2005 4.6L V8 DOHC

Lincoln Aviator

2020-2020 3.0L Twin-Turbo V6

Lincoln Aviator

2020-2020 3.0L V6 Twin Turbo

Lincoln Aviator

2020-2020 3.0L V6 Twin Turbo Hybrid

Lincoln Aviator

2021-2021 3.0L Twin-Turbo V6

Lincoln Aviator

2021-2021 3.0L V6 Twin Turbo

Common Questions

What does code P0628 mean on a 2018-2018 Lincoln MKX?

P0628 stands for "Fuel Pump A Control Circuit Low". Low voltage in fuel pump control circuit.

What are the symptoms of P0628 on a Lincoln MKX?

Common symptoms of P0628 include: No start, Weak fuel pump.

What causes P0628 on a 2018-2018 Lincoln MKX?

Common causes of P0628 include: Short to ground, Corroded wiring, Bad relay.

Last updated: March 2026

View Labor Times | View Torque Specs | View Fluid Specs