AutoCodes – Chevrolet – P0451 2016 Chevrolet Silverado

P0451 2016 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 2016 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 1,404

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 2016 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 2016 Chevrolet Silverado - Fuel Tank Pressure Sensor Performance - AutoCodes.com — P0451 2016 Chevrolet Silverado Code - Fuel Tank Pressure Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0451 2016 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 2016 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 2016 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.

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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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0451 on a 2016 Chevrolet Silverado?

The common symptoms of P0451 include the check engine light coming on, issues with fuel economy, and potential difficulty starting the vehicle.

2. What does OBDII code P0451 indicate on a 2016 Chevrolet Silverado?

Code P0451 indicates a problem with the fuel tank pressure sensor, specifically that the sensor is reporting a performance issue.

3. What are the possible causes of OBDII code P0451 on a 2016 Chevrolet Silverado?

Possible causes of P0451 include a faulty fuel tank pressure sensor, a damaged sensor wiring harness, or a problem with the fuel tank itself.

4. How can I diagnose the cause of OBDII code P0451 on my 2016 Chevrolet Silverado?

Diagnosing P0451 typically involves checking the fuel tank pressure sensor and its wiring for any visible damage or issues, as well as using a diagnostic scanner to read live sensor data.

5. Can a DIY enthusiast repair OBDII code P0451 on a 2016 Chevrolet Silverado?

DIY enthusiasts can attempt to repair P0451 by replacing the fuel tank pressure sensor or repairing any damaged wiring, but careful diagnosis and proper tools are essential.

6. Is it safe to continue driving with OBDII code P0451 on a 2016 Chevrolet Silverado?

While the vehicle may still be operational with P0451, it is recommended to address the issue promptly to prevent potential fuel system problems and ensure optimal performance.

7. How much does it typically cost to fix OBDII code P0451 on a 2016 Chevrolet Silverado?

The cost of fixing P0451 can vary depending on the cause of the issue and whether you choose to do the repair yourself or take it to a mechanic. Sensor replacement costs can range from $100 to $300.

8. Can a loose gas cap trigger OBDII code P0451 on a 2016 Chevrolet Silverado?

While a loose gas cap is more commonly associated with P0456 (small EVAP system leak), it is still a good idea to check and ensure the gas cap is properly tightened when diagnosing P0451.

9. Will resetting the OBDII codes clear P0451 on a 2016 Chevrolet Silverado?

Resetting the OBDII codes may temporarily clear P0451, but if the underlying issue is not addressed, the code is likely to return after driving cycles.

10. How important is it to address OBDII code P0451 promptly on a 2016 Chevrolet Silverado?

It is important to address P0451 promptly to prevent potential fuel system issues, ensure proper emissions compliance, and maintain the overall performance of your vehicle.