Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2017 Kia Optima Plug-In Hybrid EXFACTORY OEM SERVICE PROCEDURE

DTC Information: DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	Monitor the fuel pressure sensor's signal	Poor Connection Open or Short to Ground in Signal Fuel pressure sensor Fuel pump control module (FPCM)
Enable Conditions	Target fuel pressure is higher than 250kpa and lower than 600kpa Engine Running Battery voltage is higher than 10V
Threshold Value	Fuel pressure sensor power voltage is less than 4.5V
Diagnostic Time	5s
MIL ON Condition	NO MIL

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.