P0231
High SeverityFuel Pump Secondary Circuit Low
Fuel System
What Does P0231 Mean?
The fuel pump feedback circuit is reading low. The ECM is not seeing proper fuel pump operation.
Common Fix
Replace fuel pump
Estimated Cost (DIY)
$100 - $300
Symptoms
- ⚠️Engine stalls at speed
- ⚠️Hard starting
- ⚠️Loss of power under load
- ⚠️Engine dies when hot
Common Causes
How to Diagnose P0231
- 1Test fuel pressure at rail
- 2Check fuel pump connector for corrosion
- 3Check for voltage drop in fuel pump circuit
- 4Replace fuel pump if pressure low
OEM Diagnostic Flowchart
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to P0231.
OEM Manual Evidence
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A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...
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A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...
Exact Vehicle Hubs
Browse →Open the exact vehicle hub for a repair workflow commonly associated with P0231.
Open the exact vehicle hub for a repair workflow commonly associated with P0231.
Open the exact vehicle hub for a repair workflow commonly associated with P0231.
Open the exact vehicle hub for a repair workflow commonly associated with P0231.
Open the exact vehicle hub for a repair workflow commonly associated with P0231.
Open the exact vehicle hub for wiring diagnosis commonly associated with P0231.
Exact Repair Workflows
Browse →Open the exact repair flow most commonly associated with P0231 on this vehicle.
Open the exact repair flow most commonly associated with P0231 on this vehicle.
Open the exact repair flow most commonly associated with P0231 on this vehicle.
Open the exact repair flow most commonly associated with P0231 on this vehicle.
Open the exact repair flow most commonly associated with P0231 on this vehicle.
Open the exact repair flow most commonly associated with P0231 on this vehicle.
Wiring Diagram Paths
Browse →Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0231.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0231.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0231.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0231.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0231.
Open the exact fuel pump diagram cluster for a vehicle that commonly triggers P0231.
Related Codes
The fuel pump relay or primary circuit has a fault. The fuel pump may not be getting power.
Fuel pump circuit voltage is higher than expected.
Fuel rail pressure sensor reads too low. Could be a sensor fault or actually low fuel pressure.
Frequently Asked Questions
- Can a fuel pump die intermittently?
- Yes — fuel pumps often fail when hot. The car starts fine cold but stalls after warm-up. This is a common failure pattern.
- How long do fuel pumps last?
- Most fuel pumps last 100,000-150,000 miles. Running the tank below 1/4 regularly shortens pump life.
Related Repair Guides
If your vehicle has triggered P0231, these DIY repair guides may help: