AutoCodes – Chevrolet – P0451 2017 Chevrolet Silverado

P0451 2017 Chevrolet Silverado Code - Fuel Tank Pressure Sensor Performance

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: P0451 2017 Chevrolet Silverado indicates Fuel Tank Pressure Sensor Performance.
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 2,171

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 May 12, 2024

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0451 2017 Chevrolet Silverado 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 the controller is unable to re-zero the fuel tank pressure sensor voltage within a calibrated range during the engine-off small leak test.

OBDII Code P0451 2017 Chevrolet Silverado - Fuel Tank Pressure Sensor Performance - AutoCodes.com — P0451 2017 Chevrolet Silverado Code - Fuel Tank Pressure Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0451 2017 Chevrolet Silverado?

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 P0451 2017 Chevrolet Silverado?

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 P0451 2017 Chevrolet Silverado 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 P0451 2017 Chevrolet Silverado code?

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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 P0451 2017 Chevrolet Silverado Code

1. What does the OBDII code P0451 mean on a 2017 Chevrolet Silverado?

P0451 indicates an issue with the fuel tank pressure sensor's performance, which is part of the evaporative emissions control (EVAP) system.

2. What are the symptoms of code P0451 in a 2017 Chevy Silverado?

Symptoms may include the Check Engine Light turning on, difficulty refueling, fuel odors, or reduced fuel efficiency.

3. What causes the P0451 code in a 2017 Chevrolet Silverado?

Common causes include a malfunctioning fuel tank pressure sensor, damaged EVAP lines, a clogged vent valve, or wiring issues.

4. Can I continue driving with a P0451 code on my 2017 Silverado?

While the truck may still be drivable, ignoring the code could lead to reduced fuel efficiency or potential damage to the EVAP system over time.

5. How do I diagnose the P0451 code on my 2017 Chevy Silverado?

Use an OBDII scanner to confirm the code, inspect the fuel tank pressure sensor and EVAP system for damage, and check for loose or damaged wiring.

6. How much does it cost to fix the P0451 code on a 2017 Chevrolet Silverado?

Repair costs can vary but typically range from $150 to $400, depending on whether the fuel tank pressure sensor or other EVAP components need replacement.

7. Can a loose gas cap cause the P0451 code in my Silverado?

While a loose gas cap can cause EVAP-related codes, P0451 is more likely caused by issues with the fuel tank pressure sensor or related components.

8. How do I reset the P0451 code on a 2017 Silverado after repairs?

After fixing the issue, use an OBDII scanner to clear the code, or the system may reset itself after several drive cycles.

9. What tools are needed to fix the P0451 code on a 2017 Chevy Silverado?

Common tools include an OBDII scanner, a multimeter for electrical testing, and basic hand tools for sensor or EVAP component replacement.

10. Is the P0451 code covered under warranty for a 2017 Chevrolet Silverado?

Depending on your mileage and warranty terms, the EVAP system may still be covered under the emissions warranty. Check with your dealer for specifics.