P0627 on Acura
Fuel Pump "A" Control Circuit/Open
P0627 on Acura vehicles indicates fuel pump "a" control circuit/open. Au7o has documented this code across 1 Acura model — most commonly on MDX. This code means the engine computer detected an open (broken) circuit in the control wiring it uses to command the primary fuel pump, so it cannot reliably switch the pump on. The fuel pump delivers pressurized fuel to the engine, so a control-circuit problem can cause low fuel pressure, hard starting, stalling, no-start, or loss of power. Because it can leave the vehicle stranded, it should be diagnosed promptly.
Common Causes of P0627
- •Faulty fuel pump relay or fuel pump driver module
- •Open, damaged, or corroded wiring in the pump control circuit
- •Bad electrical connector at the pump, relay, or PCM
- •Blown fuse in the fuel pump circuit
- •Failed fuel pump (internal open)
- •Poor ground for the fuel pump circuit
- •PCM/ECM control driver fault (rare)
P0627 on Acura by Model
Acura MDX(1 issue)
- Fuel Pump Impeller Deformation Causing Stall (NHTSA Recall 23V-858)2018-2020
Certain 2018-2020 MDX (J35Y5 3.5L V6) and MDX Sport Hybrid (3.0L V6 hybrid) units were built with low-density, improperly molded in-tank fuel pump impellers. Surface cracking from production solvent absorption causes the impeller to swell and seize against the pump body, leading to no-start or stall while driving. Honda issued NHTSA recall 23V-858 covering ~2.5 million Honda/Acura vehicles.
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View P0627 across all makes →Frequently Asked Questions
What does P0627 mean on Acura?▼
P0627 stands for "Fuel Pump "A" Control Circuit/Open." This code means the engine computer detected an open (broken) circuit in the control wiring it uses to command the primary fuel pump, so it cannot reliably switch the pump on. The fuel pump delivers pressurized fuel to the engine, so a control-circuit problem can cause low fuel pressure, hard starting, stalling, no-start, or loss of power. Because it can leave the vehicle stranded, it should be diagnosed promptly. On Acura specifically, this code is documented across 1 model.
What causes P0627 on Acura vehicles?▼
Common causes on Acura: Faulty fuel pump relay or fuel pump driver module, Open, damaged, or corroded wiring in the pump control circuit, Bad electrical connector at the pump, relay, or PCM, Blown fuse in the fuel pump circuit, Failed fuel pump (internal open). Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0627 on a Acura?▼
Repair costs vary widely depending on the root cause and specific Acura model.
Which Acura models have P0627 documented?▼
Au7o has documented P0627 on 1 Acura model: MDX.