AutoCodes – GMC – P0454 GMC

P0454 GMC Code - Fuel Tank Pressure Sensor Circuit Intermittent

Quick Answer

The fuel tank pressure sensor measures vapor pressure or vacuum in the Evaporative Emission (EVAP) system. Common causes include Faulty Fuel Tank Pressure (FTP) Sensor, Fuel Tank Pressure Sensor harness is open or shorted, Fuel Tank Pressure Sensor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0454 GMC indicates Fuel Tank Pressure Sensor Circuit Intermittent.
Common causes: Common causes include Faulty Fuel Tank Pressure (FTP) Sensor, Fuel Tank Pressure Sensor harness is open or shorted, Fuel Tank Pressure Sensor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 11,234

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 28, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0454 GMC Description

The fuel tank pressure sensor measures vapor pressure or vacuum in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) supplies a 5 V reference and a low reference circuit to the fuel tank pressure sensor. The fuel tank pressure sensor signal voltage varies depending on EVAP system pressure or vacuum. The control module also uses this fuel tank pressure signal to determine atmospheric pressure for use in the engine-off small leak test, DTC P0442. Before using this signal as an atmospheric reference, it must first be re-zeroed. The Diagnostic Trouble Code (DTC) will be set if during the engine-off natural vacuum small leak test, P0442, the ECM detects an abrupt fuel tank pressure signal change, other than a refueling event. An abrupt change is defined as a change of greater than 0.45 in H2O in the span of 1 s but less than 1 in H2O in 12.5 ms.

OBDII Code P0454 GMC - Fuel Tank Pressure Sensor Circuit Intermittent - AutoCodes.com — P0454 GMC Code - Fuel Tank Pressure Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0454 GMC?

Faulty Fuel Tank Pressure (FTP) Sensor
Fuel Tank Pressure Sensor harness is open or shorted
Fuel Tank Pressure Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0454 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0454 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0454 GMC code?

Need more information on how to fix the P0454 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0454 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0454 2014 GMC Sierra — Fuel Tank Pressure Sensor Circuit Intermittent
P0454 2015 GMC Sierra — Fuel Tank Pressure Sensor Circuit Intermittent
P0454 2016 GMC Sierra — Fuel Tank Pressure Sensor Circuit Intermittent
P0454 2017 GMC Sierra — Fuel Tank Pressure Sensor Circuit Intermittent
P0454 2018 GMC Sierra — Fuel Tank Pressure Sensor Circuit Intermittent

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0454 GMC Code

1. What does the OBDII code P0454 mean on a GMC?

P0454 indicates an intermittent issue with the fuel tank pressure sensor circuit, which is part of the vehicle's evaporative emissions control (EVAP) system.

2. What are the common symptoms of code P0454 on a GMC?

Symptoms may include an illuminated check engine light, poor fuel economy, difficulty starting the engine after refueling, or failed emissions tests.

3. What causes the P0454 code to appear on a GMC?

Common causes include a faulty fuel tank pressure sensor, damaged or corroded wiring, loose electrical connections, or issues with the EVAP system components.

4. Can a loose gas cap trigger the P0454 code on a GMC?

While a loose gas cap is a common cause of EVAP-related codes, it is unlikely to directly trigger P0454, which specifically pertains to the fuel tank pressure sensor circuit.

5. How is the P0454 code diagnosed on a GMC?

A mechanic will use a scan tool to read live data, inspect the fuel tank pressure sensor and wiring for damage, and check the EVAP system for leaks or blockages.

6. Can you drive a GMC with the P0454 code?

Driving with this code is generally safe for short distances, but prolonged driving may lead to increased emissions and potential damage to the EVAP system.

7. How do you fix the P0454 code on a GMC?

Repairs typically involve replacing the faulty fuel tank pressure sensor, repairing damaged wiring, or addressing any EVAP system leaks.

8. How much does it cost to fix the P0454 code on a GMC?

Repair costs can range from $100 to $300, depending on whether the issue is a sensor replacement, wiring repair, or other EVAP-related fixes.

9. Can a failing fuel pump cause the P0454 code on a GMC?

While uncommon, a failing fuel pump that disrupts fuel pressure readings may contribute to this code. However, the primary focus should be the fuel tank pressure sensor.

10. How do you prevent the P0454 code from recurring on a GMC?

Regular maintenance of the EVAP system, ensuring wiring is intact, and promptly addressing any check engine light issues can help prevent recurrence.