What Does P0232 Mean?
The fuel pump secondary circuit has an intermittent fault. In vehicles with a secondary or high-pressure fuel pump (common in GDI systems), the ECM has detected irregular electrical behavior in the pump's control or feedback circuit. This can cause momentary drops in fuel pressure, leading to intermittent hesitation, misfire, or stumble under load.
Common Causes
30%
Intermittent electrical connection at the secondary fuel pump connector
25%
Secondary fuel pump motor developing intermittent internal faults
20%
Chafed or damaged wiring in the secondary pump circuit
15%
Fuel pump driver module (FPDM) with intermittent output
10%
Poor ground connection for the secondary pump circuit
Diagnostic Steps
1
Monitor fuel pressure PIDs (both low-side and high-side if GDI) during a road test — watch for sudden pressure drops that correlate with the intermittent symptoms.
2
Perform a wiggle test on the secondary fuel pump connector and associated wiring while monitoring fuel pressure and pump current. Look for any momentary dropouts.
3
Measure the secondary pump circuit voltage under load with a multimeter set to MIN/MAX capture — a momentary dip below 10V indicates a high-resistance connection or wiring fault.
4
Inspect the fuel pump driver module (if equipped) connector for corrosion, especially on vehicles where it's mounted underneath or near the fuel tank where it's exposed to road spray.
5
Check all ground points in the fuel pump circuit — measure voltage drop from the pump ground terminal to battery negative while the pump is running. Anything over 0.3V indicates a poor ground.
Estimated Repair Cost
$150 - $700
Parts + labor, varies by vehicle and location
The fuel pump secondary circuit has an intermittent fault. In vehicles with a secondary or high-pressure fuel pump (common in GDI systems), the ECM has detected irregular electrical behavior in the pump's control or feedback circuit. This can cause momentary drops in fuel pressure, leading to interm...
The most common cause of P0232 (Fuel Pump Secondary Circuit Intermittent) is: Intermittent electrical connection at the secondary fuel pump connector
Typical repair costs for P0232 range from $150 to $700, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Drive with caution. Intermittent fuel pump faults can cause unpredictable stalling or power loss. The intermittent nature makes this particularly dangerous since it can occur without warning. Avoid situations where sudden power loss would be hazardous (highway merging, mountain driving). Diagnose and repair promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0232 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel System
Difficulty
Type
Generic (SAE)
Recommended Tools
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