P025A on 2021-2023 Mercedes-Benz E-Class — Fuel Pump Module Control Circuit/Open
1 vehicles · 1 makes · $900-$1,800 repair
How to diagnose and fix P025A: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Mercedes-Benz E-Class · 2021–2023
A number of late-model E-Class owners reported hard starting, long crank times, hesitation, and occasional stalling traced to low-pressure fuel supply faults, including in-tank fuel pump or delivery module issues. Mercedes-Benz recalled 2021-2023 E-Class vehicles (NHTSA 23V-445, expanded by 23V-880) because the in-tank fuel pump impeller may not meet material specifications, can deform and rub the pump housing, and can shut the fuel pump down, causing loss of drive power; a warning message and rough running may appear first. Symptoms can be sporadic at first and become a complete no-start as the pump weakens.
Common Symptoms
- Extended cranking
- Intermittent no-start
- Engine stalling
- Hesitation on acceleration
- Reduced power
- Whining noise from fuel tank area
How to Fix
First check the VIN for open recalls 23V-445 / 23V-880; under the recall a Mercedes-Benz dealer replaces the fuel delivery module free of charge. Measure low-side fuel pressure during crank and under load, compare commanded versus actual values, and inspect pump current draw and fuel pump control operation. Repair usually involves replacing the in-tank fuel pump/delivery module and sealing ring, then clearing adaptations and verifying pressure stability on a road test. If contaminated fuel is suspected, inspect the tank and filter components as well.
Owner tips & cautions
- TipOwners recommend not ignoring occasional long-crank events; capturing fuel pressure data early can prevent getting stranded later.
Sources for this issue (2)
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P025A 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 P025A mean?
P025A stands for "Fuel Pump Module Control Circuit/Open." This code means the engine computer detected an open or abnormal voltage condition in the fuel pump (module 'A') control circuit, indicating a loss of electrical continuity. The computer commands the fuel pump control module to run the pump at the proper rate; if the control circuit is open or the expected feedback is missing, this code sets. It does not necessarily mean the pump itself is bad. It can cause hard starting, no-start, stalling, or reduced engine performance.
What are the most common causes of P025A?
The most common causes of P025A are: Open or broken wiring in the fuel pump control circuit, Faulty fuel pump (driver) control module, Corroded or loose connector at the pump module, Faulty fuel pump assembly, Blown fuse or relay in the pump circuit, Poor ground connection, Faulty PCM/ECM (rare). The specific cause varies by vehicle.
How much does it cost to fix P025A?
Repair costs for P025A range from $900 to $1,800, depending on the vehicle and root cause.
Which vehicles are affected by P025A?
Au7o has documented P025A across 1 vehicle models from 1 manufacturers: Mercedes-Benz.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.