AutoCodes – Honda – P0451 2000 Honda Civic

P0451 2000 Honda Civic Code - Fuel Tank Pressure Sensor Range/Performance

Quick Answer

The Fuel Tank Pressure (FTP) pressure sensor detects pressure in the purge line. Common causes include Fuel Tank Pressure 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 2000 Honda Civic indicates Fuel Tank Pressure Sensor Range/Performance.
Common causes: Common causes include Fuel Tank Pressure 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 9,643

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 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0451 2000 Honda Civic Description

The Fuel Tank Pressure (FTP) pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases.

OBDII Code P0451 2000 Honda Civic - Fuel Tank Pressure Sensor Range/Performance - AutoCodes.com — P0451 2000 Honda Civic Code - Fuel Tank Pressure Sensor Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0451 2000 Honda Civic?

Fuel Tank Pressure 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 2000 Honda Civic?

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 2000 Honda Civic 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 2000 Honda Civic code?

Need more information on how to fix the P0451 2000 Honda Civic code? Get Access to Factory Service Manuals

Need Help with the 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 2000 Honda Civic Code

1. What are common symptoms of OBDII code P0451 on a 2000 Honda Civic?

The common symptoms of code P0451 on a 2000 Honda Civic include the check engine light illuminating, decreased fuel efficiency, and issues with the vehicle's evaporative emissions system.

2. What does the OBDII code P0451 on a 2000 Honda Civic indicate?

Code P0451 on a 2000 Honda Civic indicates a problem with the Fuel Tank Pressure Sensor Range/Performance, which is responsible for monitoring the pressure inside the fuel tank.

3. What are possible causes of OBDII code P0451 on a 2000 Honda Civic?

Possible causes of code P0451 on a 2000 Honda Civic include a faulty fuel tank pressure sensor, damaged wiring or connectors in the sensor circuit, or a problem with the evaporative emissions system.

4. How can I diagnose the OBDII code P0451 on a 2000 Honda Civic?

Diagnosing code P0451 on a 2000 Honda Civic involves using an OBDII scanner to retrieve the code, inspecting the fuel tank pressure sensor and its wiring, and performing a smoke test to check for leaks in the evaporative emissions system.

5. Can I drive my 2000 Honda Civic with OBDII code P0451?

It is generally safe to drive your 2000 Honda Civic with code P0451, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent potential damage to the vehicle's emissions system.

6. How can I repair OBDII code P0451 on a 2000 Honda Civic?

To repair code P0451 on a 2000 Honda Civic, you may need to replace the fuel tank pressure sensor, repair any damaged wiring or connectors, or address any issues with the evaporative emissions system components.

7. Will resetting the check engine light fix OBDII code P0451 on a 2000 Honda Civic?

Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing code P0451 on a 2000 Honda Civic. It is important to diagnose and repair the problem to prevent the code from reappearing.

8. How much does it typically cost to repair OBDII code P0451 on a 2000 Honda Civic?

The cost to repair code P0451 on a 2000 Honda Civic can vary depending on the specific cause of the issue and the labor rates in your area. It is recommended to consult with a mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P0451 on a 2000 Honda Civic?

DIY enthusiasts with the necessary tools and knowledge may be able to diagnose and repair code P0451 on a 2000 Honda Civic, especially if the issue is related to simple fixes like sensor replacement or wiring repair.

10. How often does OBDII code P0451 occur in 2000 Honda Civics?

Code P0451 related to the Fuel Tank Pressure Sensor Range/Performance is not extremely common in 2000 Honda Civics, but it can still occur due to sensor failures, wiring issues, or problems with the evaporative emissions system.