P0451 2017 GMC Sierra 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 GMC Sierra 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.
Code P0451 2017 GMC Sierra Description
What are the Possible Causes of the DTC P0451 2017 GMC Sierra?
- 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 GMC Sierra?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0451 2017 GMC Sierra 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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Frequently Asked Questions about P0451 2017 GMC Sierra Code
1. What does the OBD-II code P0451 mean on a 2017 GMC Sierra?
The P0451 code indicates a performance issue with the fuel tank pressure sensor, which monitors pressure changes in the fuel system for the evaporative emissions control (EVAP) system.
2. What are the common symptoms of code P0451 on a 2017 GMC Sierra?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, difficulty refueling, or a faint fuel odor near the vehicle.
3. What causes the P0451 code on a 2017 GMC Sierra?
Common causes include a faulty fuel tank pressure sensor, damaged wiring or connectors, a clogged EVAP system vent, or a malfunctioning EVAP purge or vent valve.
4. Can a loose gas cap trigger the P0451 code on a 2017 GMC Sierra?
While a loose gas cap is a common EVAP issue, it is not a typical cause of the P0451 code, which specifically relates to the fuel tank pressure sensor.
5. How do I diagnose the P0451 code on my 2017 GMC Sierra?
Start by inspecting the fuel tank pressure sensor, wiring, and connectors for damage. Use a scan tool to monitor sensor readings and perform a smoke test to check for leaks in the EVAP system.
6. Is it safe to drive with the P0451 code on a 2017 GMC Sierra?
Yes, it is generally safe to drive, but prolonged driving with this code may lead to increased emissions and potential damage to other EVAP system components.
7. How much does it cost to fix the P0451 code on a 2017 GMC Sierra?
Repair costs can vary. Replacing the fuel tank pressure sensor typically costs between $150 and $300, including parts and labor.
8. Can I clear the P0451 code without fixing the issue?
Clearing the code without addressing the underlying problem may temporarily turn off the check engine light, but the code and symptoms will likely return.
9. What tools do I need to fix the P0451 code on my 2017 GMC Sierra?
You may need a scan tool, a multimeter, a smoke machine for EVAP system leak testing, and basic hand tools to replace the sensor or repair wiring.
10. How can I prevent the P0451 code from reoccurring on my 2017 GMC Sierra?
Regularly inspect and maintain the EVAP system components, ensure proper installation of the gas cap, and address any warning lights promptly to prevent further issues.
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