What Does P2632 Mean?
The control circuit for the secondary fuel pump (Fuel Pump B) has an open circuit or electrical fault. This code applies to vehicles with dual fuel pump systems where a primary and secondary pump work together.
Common Causes
35%
Faulty fuel pump B or internal open circuit in pump motor
25%
Failed fuel pump relay for pump B circuit
20%
Open circuit or damaged wiring in fuel pump B control circuit
15%
Blown fuse in fuel pump B power supply circuit
5%
PCM fuel pump driver circuit failure
Diagnostic Steps
1
Step 1: Check fuel pump B fuse and replace if blown; investigate cause if fuse is blown
2
Step 2: Test fuel pump B relay operation by swapping with known good relay or testing coil and contacts
3
Step 3: Measure voltage at fuel pump B connector with key on (should have battery voltage when commanded on)
4
Step 4: Check ground circuit continuity at fuel pump B connector (should be less than 1 ohm to chassis)
5
Step 5: Test fuel pump B resistance (typically 0.5-2 ohms) and current draw; replace pump if faulty
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The control circuit for the secondary fuel pump (Fuel Pump B) has an open circuit or electrical fault. This code applies to vehicles with dual fuel pump systems where a primary and secondary pump work together.
The most common cause of P2632 (Fuel Pump "B" Control Circuit /Open) is: Faulty fuel pump B or internal open circuit in pump motor
Typical repair costs for P2632 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle may experience reduced power, hesitation, or stalling under high demand conditions. Safe for light driving but avoid highway use until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2632 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
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