Reduction Solenoid Valve System Fault
Table of contents
P0770 KIA Possible Causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Reduction solenoid valve
- Reduction solenoid valve harness is open or shorted
- Reduction solenoid valve circuit poor electrical connection
How do I fix code P0770 KIA?
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 P0770 KIA code
The cost of diagnosing the P0770 KIA 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.
When is the code detected
The P0770 code is detected when the ECM detects an improper voltage drop when it tries to operate the solenoid valve.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission will not shift gears.
P0770 KIA Description
Reduction 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.