P0452

Q: What does OBD2 code P0452 mean?

P0452 means: Fuel Tank Pressure Sensor Circuit Low Input. The ECM has detected an unusually low voltage signal from the Fuel Tank Pressure (FTP) sensor, which monitors pressure inside the fuel tank as part of the EVAP leak detection system.

Fuel Tank Pressure Sensor Circuit Low Input

The ECM has detected an unusually low voltage signal from the Fuel Tank Pressure (FTP) sensor, which monitors pressure inside the fuel tank as part of the EVAP leak detection system.

SeverityMinor

CategoryEmissions

Est. Repair Cost$40–$200

Code TypePowertrain

DIY RepairYes

⚡ Common Causes

›Failed FTP sensor
›Wiring short to ground
›Connector corrosion
›Sensor clogged with fuel

⚠️ Symptoms

›Check engine light
›EVAP system malfunction

✅ How to Fix — Step by Step

Step 1:Inspect FTP sensor connector
Step 2:Test sensor voltage
Step 3:Replace FTP sensor

🔧 Diagnostic Tools Required

✔OBD-II Diagnostic Scanner
✔Digital Multimeter
✔Basic Hand Tools
✔Flashlight
✔Vehicle Service Manual

Using the correct diagnostic tools helps identify the root cause of P0452 before replacing parts unnecessarily. Always confirm the fault using live data and manufacturer-recommended diagnostic procedures.

💡 Pro Tip: Inspect the FTP sensor's vent filter and connector for fuel contamination first — a sensor that's been splashed with fuel from an overfilled tank is a very common cause of this code.

Repair Cost Estimate

Full Repair Estimate

$40–$200

DIY Possible?

YES

Severity

Minor

Frequently Asked Questions

What does OBD2 code P0452 mean?+

P0452 stands for Fuel Tank Pressure Sensor Circuit Low Input. The ECM has detected an unusually low voltage signal from the Fuel Tank Pressure (FTP) sensor, which monitors pressure inside the fuel tank as part of the EVAP leak detection system.

What causes code P0452?+

Failed FTP sensor; Wiring short to ground; Connector corrosion; Sensor clogged with fuel

How do I fix code P0452?+

Inspect FTP sensor connector; Test sensor voltage; Replace FTP sensor

How much does it cost to fix P0452?+

Estimated repair cost for P0452 is $40–$200.

Is P0452 DIY-friendly?+

Yes — P0452 is generally DIY-friendly with basic tools.