RAM P1456: Fuel Tank Pressure Sensor Circuit Low

Is your scanner showing RAM P1456?
No worries. We'll show you what it means and how to deal with it.

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RAM P1456: Fuel Tank Pressure Sensor Circuit Low

DIY Difficulty Level
Repair Cost
Can I Still Drive?
Yes (Short-term only)

What Does The RAM P1456 Code Mean?

The Fuel Tank Pressure (FTP) Sensor provides the Powertrain Control Module (PCM) with information on vapor pressure inside the fuel tank. The FTP Sensor is a transducer that varies resistance according to changes in pressure. The PCM provides a 5 volt supply and sensor ground. The sensor sends a feedback voltage to the PCM on the signal circuit. As the fuel tank pressure changes, the feedback voltage changes proportionally.

What Are The Potential Causes Of The RAM P1456 Code?

  • 5-volt supply circuit open/high resistance
  • 5-volt supply circuit shorted to ground
  • FTP sensor signal circuit shorted to ground
  • FTP sensor signal circuit shorted to the sensor ground circuit
  • Fuel tank pressure sensor (FTP)
  • Powertrain control module (PCM)

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> 2012 Dodge 1500 Ram Truck 5.7L ECU ECM PCM Engine Computer - OEM
>>> Fuel Vapor Sensor - Mopar (68525698AA)

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources


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