AutoCodes – Saturn – P0454 Saturn

P0454 Saturn Code - Fuel Tank Pressure Sensor Circuit Intermittent

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: P0454 Saturn indicates Fuel Tank Pressure Sensor Circuit Intermittent.
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 2,176

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 28, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0454 Saturn 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 during the engine-off natural vacuum small leak test, P0442, the ECM detects an abrupt fuel tank pressure signal change, other than a refueling event. An abrupt change is defined as a change of greater than 0.45 in H2O in the span of 1 s but less than 1 in H2O in 12.5 ms.

OBDII Code P0454 Saturn - Fuel Tank Pressure Sensor Circuit Intermittent - AutoCodes.com — P0454 Saturn Code - Fuel Tank Pressure Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0454 Saturn?

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 P0454 Saturn?

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 P0454 Saturn 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 P0454 Saturn code?

Need more information on how to fix the P0454 Saturn code? Get Access to Factory Service Manuals

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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 P0454 Saturn Code

1. What does the OBDII code P0454 mean on a Saturn?

P0454 indicates an intermittent issue with the fuel tank pressure sensor circuit, which is part of the EVAP (Evaporative Emission Control) system.

2. What are the symptoms of a P0454 code on a Saturn?

Common symptoms include an illuminated Check Engine Light, possible difficulty refueling, reduced fuel efficiency, or increased emissions.

3. What causes the P0454 code on a Saturn?

Possible causes include a faulty fuel tank pressure sensor, damaged or corroded wiring, loose electrical connections, or a malfunctioning EVAP system component.

4. Can a loose gas cap trigger the P0454 code?

While a loose gas cap is more likely to trigger other EVAP codes, it is less commonly associated with P0454 specifically. However, it’s still worth checking.

5. How do I diagnose a P0454 code on my Saturn?

Start by inspecting the fuel tank pressure sensor and its wiring for damage or corrosion. Use a scan tool to monitor sensor readings for inconsistencies and check for voltage variations.

6. Can I drive my Saturn with a P0454 code?

Driving with a P0454 code is generally safe, but it may lead to increased emissions and fuel inefficiency. It’s best to address the issue promptly.

7. How do I fix the P0454 code on a Saturn?

Repairs may include replacing a faulty fuel tank pressure sensor, repairing damaged wiring or connectors, or addressing other EVAP system issues.

8. How much does it cost to fix a P0454 code on a Saturn?

The cost depends on the specific repair. Replacing a fuel tank pressure sensor typically costs $150–$300, including parts and labor.

9. Can a DIYer fix a P0454 code on a Saturn?

Yes, if you have basic automotive knowledge and tools, you can inspect and replace the sensor or repair wiring. However, more complex EVAP system repairs may require a professional.

10. Will clearing the P0454 code fix the problem?

Clearing the code will turn off the Check Engine Light temporarily, but it won’t resolve the root cause. The issue may reoccur until properly repaired.