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Engine-Codes – GMC – P0451 GMC

P0451 GMC Code - Fuel Tank Pressure Sensor Performance

Quick Answer

The P0451 code for GMC vehicles indicates a problem with the Fuel Tank Pressure Sensor Performance. Common causes include Faulty Fuel Tank Pressure Sensor, Damaged wiring or connectors, Corrosion or debris in the sensor. 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 GMC indicates Fuel Tank Pressure Sensor Performance.
Common causes
Common causes include Faulty Fuel Tank Pressure Sensor, Damaged wiring or connectors, Corrosion or debris in the sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0451 GMC Description

The P0451 code for GMC vehicles indicates a problem with the Fuel Tank Pressure Sensor Performance. This sensor is responsible for monitoring the pressure inside the fuel tank and sending this data to the engine control module (ECM). The ECM uses this information to adjust the fuel mixture and ensure optimal performance and fuel efficiency. When this sensor malfunctions or fails, it can lead to a variety of issues that can affect the vehicle's performance and emissions.

OBDII Code P0451 GMC - Fuel Tank Pressure Sensor Performance
P0451 GMC Code - Fuel Tank Pressure Sensor Performance

Common Causes of P0451 GMC

  1. Faulty Fuel Tank Pressure Sensor
  2. Damaged wiring or connectors
  3. Corrosion or debris in the sensor
  4. EVAP system leaks
  5. ECM software issues

Symptoms of P0451 GMC

  1. Check Engine Light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Rough idling or engine hesitation
  4. Engine stalling
  5. Increased emissions

How to Fix P0451 GMC

  1. Retrieve the diagnostic trouble code with a scan tool to confirm P0451.
  2. Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
  3. Test the Fuel Tank Pressure Sensor using a multimeter to check for proper functionality.
  4. If the sensor is faulty, replace it with a new one and clear the trouble code.
  5. Perform a test drive to ensure the issue has been resolved.

Cost to Fix P0451 GMC

The cost of repairing a P0451 code can vary depending on the specific GMC model, the location of the sensor, and the labor rates at the auto repair shop. On average, the parts for a Fuel Tank Pressure Sensor replacement can range from $50 to $150, while the labor cost can be between $100 and $200. Overall, the total repair cost for this issue can be around $150 to $350. It is advisable to contact local auto repair shops for more accurate pricing information.

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Tech Notes for P0451 GMC





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Information for Specific GMC Models

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.

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