P0451

Low Severity

EVAP Pressure Sensor Range/Performance

EVAP System

What Does P0451 Mean?

Fuel tank pressure sensor readings are erratic or out of range.

Common Fix

Replace fuel tank pressure sensor

Estimated Cost (DIY)

$30 - $80

Symptoms

  • ⚠️Check engine light

Related Symptoms

Check engine light on

Common Causes

Failing pressure sensorlikely
Intermittent connectionpossible

How to Diagnose P0451

  1. 1Check connector
  2. 2Monitor sensor readings
  3. 3Replace sensor

OEM Diagnostic Flowchart

Scroll to load technician if/then branches.

Read live data and freeze frame for P0451 to pinpoint the cause before buying parts.

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Related Resources

Repair guides, symptom pages, and wiring diagrams related to P0451.

OEM Manual Evidence

Browse →
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 P0451.

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

Open the exact vehicle hub grounded by OEM manual evidence related to P0451.

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

Open the exact vehicle hub grounded by OEM manual evidence related to P0451.

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

Open the exact vehicle hub grounded by OEM manual evidence related to P0451.

Related Codes

P0450: EVAP Pressure Sensor CircuitRelated

Fault in the fuel tank pressure sensor that monitors EVAP system for leaks.

P0452: EVAP Pressure Sensor LowRelated

Fuel tank pressure sensor reads too low.

P0453: EVAP Pressure Sensor HighRelated

Fuel tank pressure sensor reads too high.

Frequently Asked Questions

Can altitude affect fuel tank pressure?
Yes — driving up mountains changes ambient pressure, but the ECM compensates for this.
Is this sensor related to fuel gauge?
No — the fuel tank pressure sensor monitors vapor pressure, not fuel level.

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