AutoCodes – Generic – P0452

P0452 Code - Fuel Tank Pressure Sensor Circuit Low Voltage

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: P0452 indicates Fuel Tank Pressure Sensor Circuit Low Voltage.
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 84,920

How popular is this code, among other codes? Medium

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0452 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 fuel tank pressure sensor voltage is less than 0.15 V for greater than 10 s.

OBDII Code P0452 - Fuel Tank Pressure Sensor Circuit Low Voltage - AutoCodes.com — P0452 Code - Fuel Tank Pressure Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0452?

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 P0452?

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 P0452 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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Information for Specific Makes

P0452 Acura — Fuel Tank Pressure Sensor Low Voltage
P0452 Buick — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Cadillac — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Chevrolet — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Chrysler — EVAP Pressure Switch Stuck Closed
P0452 Dodge — EVAP Pressure Switch Stuck Closed
P0452 Ford — EVAP Pressure Sensor/Switch Low
P0452 GMC — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Honda — Fuel Tank Pressure Sensor Low Voltage
P0452 Hyundai — EVAP Emission System Pressure Sensor Low Input
P0452 Infiniti — EVAP Control System Pressure Sensor Low Input
P0452 Isuzu — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Jeep — EVAP Pressure Switch Stuck Closed
P0452 KIA — EVAP Emission System- Pressure Sensor Low Input
P0452 Lexus — Evaporative Emission Control System Pressure Sensor / Switch Low Input
P0452 Mazda — Fuel Tank Pressure Sensor Malfunction Input Below Calibration
P0452 Mercedes-Benz — Evaporative Emission Control System Pressure Sensor Low Input
P0452 Mitsubishi — EVAP System Pressure Sensor Low Input
P0452 Nissan — EVAP Control System Pressure Sensor Low Input
P0452 Oldsmobile — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Pontiac — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Saturn — Fuel Tank Pressure Sensor Circuit Low Voltage
P0452 Scion — Evaporative Emission Control System Pressure Sensor / Switch Low Input
P0452 Subaru — EVAP System Pressure Sensor Low Input
P0452 Toyota — Evaporative Emission Control System Pressure Sensor / Switch Low Input

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 P0452 Code

1. What are the common symptoms of OBDII code P0452 (Fuel Tank Pressure Sensor Circuit Low Voltage)?

- Common symptoms include the illumination of the check engine light, issues with fuel economy, and potential difficulties with the vehicle's emissions system.

2. What are the possible causes of OBDII code P0452?

- The code may be triggered by a faulty fuel tank pressure sensor, a damaged sensor connector, a vacuum leak in the EVAP system, or issues with the wiring harness.

3. How can I diagnose the cause of OBDII code P0452?

- To diagnose the issue, you can use an OBDII scanner to retrieve the code, inspect the fuel tank pressure sensor and its wiring for any visible damage, and perform a smoke test to check for leaks in the EVAP system.

4. Can I drive my vehicle with OBDII code P0452?

- It is generally safe to drive the vehicle with this code, but it is recommended to get it diagnosed and repaired as soon as possible to avoid potential long-term damage to the emissions system.

5. How can I repair OBDII code P0452?

- Repair options may include replacing the fuel tank pressure sensor, repairing or replacing damaged wiring, fixing any vacuum leaks in the EVAP system, or replacing the sensor connector if necessary.

6. How much does it typically cost to repair OBDII code P0452?

- The cost of repair can vary depending on the exact cause of the code, but it may range from around $100 to $300 for parts and labor.

7. Can OBDII code P0452 cause any damage to the vehicle if left untreated?

- While driving with this code may not cause immediate harm to the vehicle, prolonged neglect can lead to potential issues with emissions, fuel economy, and overall engine performance.

8. Are there any DIY repair options for OBDII code P0452?

- Depending on your skill level, you may be able to replace the fuel tank pressure sensor or repair damaged wiring yourself. However, it is recommended to consult a professional for accurate diagnosis and repair.

9. Is it necessary to reset the OBDII code P0452 after making repairs?

- Yes, it is important to reset the code using an OBDII scanner after completing repairs. This will clear the code from the system and allow you to monitor if the issue has been successfully resolved.

10. How long does it take to repair OBDII code P0452?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair. In general, it may take a few hours to a full day to diagnose and fix the issue.