What Does P025B Mean?
The ECM has detected that the fuel pump module control circuit is operating outside its expected range or performance parameters. The fuel pump module is receiving commands but the actual fuel pump operation does not match the commanded values. This causes fuel pressure to be inconsistent, leading to driveability issues such as hesitation, surging, or poor fuel economy.
Common Causes
30%
Degraded fuel pump motor drawing excessive current causing module performance deviation
30%
Fuel pump driver module internal failure causing inaccurate pump speed control
25%
High resistance in fuel pump circuit wiring causing voltage drop and performance loss
15%
Clogged fuel filter or restricted fuel pickup causing pump to work outside normal parameters
Diagnostic Steps
1
Step 1: Monitor fuel pump duty cycle commanded vs actual fuel pressure using scan tool PIDs — compare at idle, 2000 RPM, and under load to identify deviation patterns.
2
Step 2: Measure fuel pump current draw with an inductive amp clamp — typical draw is 4-8 amps. Excessive current (over 10A) indicates a worn pump motor or restriction.
3
Step 3: Perform a voltage drop test on the fuel pump power and ground circuits under load — should be less than 0.5V on each. Check body-to-frame ground straps.
4
Step 4: Replace the fuel filter and inspect the in-tank strainer/sock for debris or collapse — a restricted filter will cause the module to overwork the pump.
5
Step 5: If current draw and wiring are normal but performance deviation persists, replace the fuel pump driver module.
Estimated Repair Cost
$150 - $900
Parts + labor, varies by vehicle and location
The ECM has detected that the fuel pump module control circuit is operating outside its expected range or performance parameters. The fuel pump module is receiving commands but the actual fuel pump operation does not match the commanded values. This causes fuel pressure to be inconsistent, leading t...
The most common cause of P025B (Fuel Pump Module Control Circuit Range/Performance) is: Degraded fuel pump motor drawing excessive current causing module performance deviation
Typical repair costs for P025B range from $150 to $900, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is drivable but may experience inconsistent power delivery and potential stalling. Schedule repair within a few days to avoid being stranded.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P025B to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Delivery System
Difficulty
Type
Generic (SAE)
Recommended Tools
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