P025A on Mercedes-Benz
Fuel Pump Module Control Circuit/Open
P025A on Mercedes-Benz vehicles indicates fuel pump module control circuit/open. Au7o has documented this code across 1 Mercedes-Benz model — most commonly on E-Class. 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. Typical repair costs on Mercedes-Benz range from $900 to $1,800, depending on the specific model and root cause.
Common Causes of P025A
- •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)
P025A on Mercedes-Benz by Model
Mercedes-Benz E-Class(1 issue)
- Fuel Pump Delivery Module Failure Leading to Extended Crank, Stalling, or No-Start2021-2024
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 service literature for related models and owner reports point to intermittent fuel pressure loss rather than a high-pressure pump problem in some cases. Symptoms can be sporadic at first and become a complete no-start as the pump weakens.
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What does P025A mean on Mercedes-Benz?▼
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. On Mercedes-Benz specifically, this code is documented across 1 model.
What causes P025A on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P025A on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $900 to $1,800, depending on the specific model and root cause.
Which Mercedes-Benz models have P025A documented?▼
Au7o has documented P025A on 1 Mercedes-Benz model: E-Class.