P0627 on Acura: How to Diagnose & Fix
Fuel Pump "A" Control Circuit/Open
1 Acura model · 1 documented issue · 1 critical
P0627 on Acura by model: symptoms, diagnosis and fix
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.
Common Symptoms
- Engine stall while driving
- Long cranking / no-start
- Intermittent loss of power
- Check Engine Light
- Fuel pump warning
How to Fix
Free recall remedy under NHTSA 23V-858 - dealer replaces the fuel pump module with a redesigned part. Check VIN at nhtsa.gov/recalls or owners.acura.com and schedule replacement immediately if not yet completed.
Sources for this issue (3)
P0627 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0627 mean on a 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 it is documented across 1 model: MDX.
What are the most common causes of P0627?
The most common causes of P0627 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0627 on a Acura?
Repair costs vary widely with the root cause and Acura model; each issue on this page carries its own estimate where one is published.
Looking for P0627 on a different make?
View P0627 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.