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P0755 KIA

P0755 KIA - Underdrive Solenoid Valve System

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Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty underdrive solenoid valve
- Underdrive solenoid valve harness is open or shorted
- Underdrive solenoid valve circuit poor electrical connection
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When is the code detected?
The P0755 code is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission will not shift gears.
P0755 KIA Description
Underdrive solenoid valve is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.
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