Engine-Codes - Lexus - P109C LEXUS

P109C LEXUS Code - Open in Fuel Pressure Switching Valve Circuit

- Code Popularity: 1,199 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P109C LEXUS Code?

  • 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 to Fix the P109C LEXUS Code?

Start by checking 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.

|What is the cost to diagnose the P109C LEXUS code?

Labor: 1.0

The cost to diagnose the P109C LEXUS code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P109C LEXUS code possible symptoms?

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

|What Does the P109C LEXUS Code Mean?

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.

Open in Fuel Pressure Switching Valve Circuit

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