What causes fault code P025E?

• Most likely: Loose connections or oxidized terminals in the fuel pump driver module (FPDM) harness • Likely: Failing fuel pump driver module (FPDM) • Possible: Faulty fuel pump (mechanical wear causing electrical instability) • Rare: Damaged wiring harness chafing against ground (intermittent short)

How do you fix fault code P025E?

STEP 1: Inspect the connector at the fuel pump driver module (usually located under the rear seat or near the tank). Look for corrosion or burnt pins. STEP 2: Measure supply voltage to the module. It should match battery voltage (~12.6V-14.4V). Check ground points (resistance < 0.3 Ohms). STEP 3: Use an oscilloscope to verify the PWM signal from the ECU to the module. The signal should be clean without excessive noise or dropouts. STEP 4: Perform a fuel pump component test via a diagnostic tool to monitor if the current draw (Amperage) fluctuates erratically. STEP 5: Replace fuel pump module or fuel pump as necessary.

Powertrain (Engine & Gearbox)Standard EOBD

P025E - Fuel Pump Module B Control Circuit Intermittent/Erratic

Q: What does fault code P025E mean?

P025E is a generic OBD-II diagnostic trouble code indicating that the Engine Control Unit (ECU) has detected an intermittent or erratic signal within the fuel pump module 'B' control circuit. Modern vehicles utilize Pulse Width Modulation (PWM) to regulate fuel pump speed and pressure based on engine load. If the signal duty cycle deviates from commanded values or if the feedback loop is unstable, the ECU logs this code. This instability can cause fuel pressure oscillations, affecting engine performance and emissions. The vehicle may enter a limp-home mode to prevent damage to high-pressure fuel system components.

Q: What are the symptoms of fault code P025E?

• Check engine light (MIL) illuminated • Hesitation or jerking during acceleration • Sporadic engine stalling • Hard starting (long cranking time) • Reduced engine power (Limp mode) • Potential failure at emissions inspection

Last updated:1 February 2026

Related:Fuel Pump Driver Module (FPDM), Fuel Pump, Engine Control Unit (ECU), Fuel Pressure Sensor, Wiring Harness

System

Powertrain (Engine & Gearbox)

Related Fault Codes

P0200

Injector Circuit Malfunction

P0201

Cylinder 1 Injector Circuit Open

P0202

Injector Circuit - Cylinder 2 - Malfunction

P0203

Injector Circuit - Cylinder 3

Technical Description

P025E is a generic OBD-II diagnostic trouble code indicating that the Engine Control Unit (ECU) has detected an intermittent or erratic signal within the fuel pump module 'B' control circuit. Modern vehicles utilize Pulse Width Modulation (PWM) to regulate fuel pump speed and pressure based on engine load. If the signal duty cycle deviates from commanded values or if the feedback loop is unstable, the ECU logs this code. This instability can cause fuel pressure oscillations, affecting engine performance and emissions. The vehicle may enter a limp-home mode to prevent damage to high-pressure fuel system components.

Possible Causes

Loose connections or oxidized terminals in the fuel pump driver module (FPDM) harness

Failing fuel pump driver module (FPDM)

Faulty fuel pump (mechanical wear causing electrical instability)

Damaged wiring harness chafing against ground (intermittent short)

Symptoms

Check engine light (MIL) illuminated

Hesitation or jerking during acceleration

Sporadic engine stalling

Hard starting (long cranking time)

Reduced engine power (Limp mode)

Potential failure at emissions inspection

Do you also have
other fault codes?

See how P025E connects with your other fault codes. Our advanced analysis tool identifies causal relationships and root causes directly.

Analyze multiple codes

P025E - Fuel Pump Module B Control Circuit Intermittent/Erratic

Related Fault Codes

Technical Description

Possible Causes

Symptoms

Recommended Solution

Workflow

Mechanic's Tip

Do you also have
other fault codes?

P025E - Fuel Pump Module B Control Circuit Intermittent/Erratic

Related Fault Codes

Technical Description

Possible Causes

Symptoms

Recommended Solution

Workflow

Mechanic's Tip

Do you also have other fault codes?

Do you also have
other fault codes?