P1457 Dodge Code - Fuel Tank Pressure Sensor Circuit High

P1457 indicates a "Fuel Tank Pressure Sensor Circuit High," meaning the fuel tank pressure sensor is detecting an abnormally high voltage signal, which could point to an electrical or sensor issue.

Common symptoms include an illuminated Check Engine Light, difficulty filling the gas tank, inconsistent fuel gauge readings, and potential issues with emissions during inspection.

Possible causes include a faulty fuel tank pressure sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning EVAP system, or corrosion in the electrical connections.

While you can usually drive with this code, prolonged operation could lead to increased emissions and reduced fuel efficiency. It’s best to address the issue promptly to avoid further complications.

Start by inspecting the fuel tank pressure sensor and its wiring for damage or corrosion. Use a multimeter to test the sensor voltage and resistance and check for any EVAP system leaks.

Repairs may include replacing the fuel tank pressure sensor, repairing damaged wiring or connectors, clearing obstructions in the EVAP system, or cleaning corroded electrical terminals.

Repair costs can range from $100 to $300, depending on whether the issue is a faulty sensor (typically $100-$200) or a more complex EVAP system repair.

A loose or faulty gas cap is less likely to trigger P1457 directly but can affect the EVAP system’s performance, so it’s worth checking as part of the diagnosis.

You’ll need an OBDII scanner, a multimeter to test electrical components, and possibly a smoke machine to check for EVAP system leaks.

Clearing the code with an OBDII scanner will remove the Check Engine Light temporarily, but it won’t resolve the underlying issue. The code will likely return if the problem isn’t fixed.