A fuel pump that runs continuously can overheat. More concerning, it means the pump cannot be shut off by the ECM in an accident.

What does fuel pump secondary circuit mean?

The secondary circuit is the feedback or monitoring circuit that tells the ECM the fuel pump is actually running.

P0232

High Severity

Fuel Pump Secondary Circuit High

Fuel System

What Does P0232 Mean?

Fuel pump circuit voltage is higher than expected.

Common Fix

Replace fuel pump relay

Estimated Cost (DIY)

$10 - $30

Symptoms

⚠️Check engine light
⚠️Possible fuel smell
⚠️No driveability issue initially

Related Symptoms

Check engine light on

Common Causes

Short circuit in fuel pump wiringlikely

Faulty fuel pump relay stuck onpossible

ECM driver issueunlikely

How to Diagnose P0232

1Check fuel pump relay
2Inspect wiring for shorts
3Measure circuit voltage
4Replace relay if stuck closed

OEM Diagnostic Flowchart

Scroll to load technician if/then branches.

Read live data and freeze frame for P0232 to pinpoint the cause before buying parts.

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Related Resources

Repair guides, symptom pages, and wiring diagrams related to P0232.

OEM Manual Evidence

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2013 GMC Truck Yukon XL Denali AWD V8-6.2L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali AWD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...

2013 GMC Truck Yukon XL Denali 2WD V8-6.2L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL Denali 2WD V8-6.2L Service Manual | Operation CHARM Operation CHARM : Car...

2013 GMC Truck Yukon XL 4WD V8-6.0L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-6.0L Service Manual | Operation CHARM Operation CHARM : Car repair...

2013 GMC Truck Yukon XL 4WD V8-5.3L A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 2013 GMC Truck Yukon XL 4WD V8-5.3L Service Manual | Operation CHARM Operation CHARM : Car repair...

Related Symptoms

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Check engine light onSymptom Hub

A check-engine light is a graph entry point into code pages, symptom-specific diagnosis, and the exact repair categories most often associated with those failures.

Exact Vehicle Hubs

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2013 Gmc Truck Yukon Xl 4wd V8 5.3l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0232.

2013 Gmc Truck Yukon Xl 4wd V8 6.0l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0232.

2013 Gmc Truck Yukon Xl Denali 2wd V8 6.2l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0232.

2013 Gmc Truck Yukon Xl Denali Awd V8 6.2l Repair HubManual

Open the exact vehicle hub grounded by OEM manual evidence related to P0232.

Related Codes

P0230: Fuel Pump Primary CircuitRelated

The fuel pump relay or primary circuit has a fault. The fuel pump may not be getting power.

P0231: Fuel Pump Secondary Circuit LowRelated

The fuel pump feedback circuit is reading low. The ECM is not seeing proper fuel pump operation.

Frequently Asked Questions

Is P0232 dangerous?: A fuel pump that runs continuously can overheat. More concerning, it means the pump cannot be shut off by the ECM in an accident.
What does fuel pump secondary circuit mean?: The secondary circuit is the feedback or monitoring circuit that tells the ECM the fuel pump is actually running.

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