P109D - Short in Fuel Pressure Switching Valve Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
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P109D Possible Causes

  • Faulty Fuel Pressure Switching Valve
  • Fuel Pressure Switching Valve harness is open or shorted
  • Fuel Pressure Switching Valve circuit poor electrical connection
  • Faulty F/PMP VSV relay
  • Faulty Engine Control Module (ECM)

How do I fix code P109D

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P109D code

Labor: 1.0

The cost of diagnosing the P109D code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P109d Description

A Flexible Fuel Vehicle (FFV) can be used with a fuel containing a high concentration of ethyl alcohol.
This FFV uses a fuel pressure switching system which changes the fuel pressure to low or high using a fuel pressure switching valve.
The code is stored when a malfunction is detected in the fuel pressure switching valve circuit. If the voltage of the fuel pressure switching valve circuit is different from the voltage commanded by the Engine Control Module (ECM), the ECM determines that the fuel pressure switching valve circuit is open or shorted, and stores a DTC.
OBDII Code P109d - Short in Fuel Pressure Switching Valve Circuit - AutoCodes.com

P109D More Information

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Information for specific makes

  • P109D LEXUS Short in Fuel Pressure Switching Valve Circuit
  • P109D TOYOTA Short in Fuel Pressure Switching Valve Circuit

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