P109D - Short in Fuel Pressure Switching Valve Circuit
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 is the P109D code repair?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 P109D code
Labor: 1.0The cost to diagnose the P109D code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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- Engine Light ON (or Service Engine Soon Warning Light)
P109D MeaningA 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.
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