Kia Optima Hybrid: Engine Control/Fuel System

CVVT (Continuously Variable Valve Timing) System Description and Operation

Description Continuous Variable Valve Timing (CVVT) system advances or retards the valve timing of the intake and exhaust valve in accordance with the ECM control signal which is calculated by the engine ...

General Safety Information and Caution

Safety Precaution     Since hybrid vehicles contain a high voltage battery, if the high voltage system or vehicles are handled incorrectly, this might lead to a serious accidents like electric ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Troubleshooting

Troubleshooting SymptomProbable causeRemedyPlay in steeringLoose yoke plugRetightenLoose steering gear mounting boltsRetightenLoose or worn tie rod endRetighten or replace as necessarySteering wheel does not return properlyExcessive turning resistance of tie rod endReplaceYoke plug excessively tightAdjustTie ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Seat Heater Switch Repair procedures

Inspection Front Seat Heater Switch 1. Disconnect the negative (-) battery terminal. 2. Remove the floor console upper cover. (Refer to the BD group - "Console") 3. Remove the seat heater switch connectors from the floor console upper cover (A). 4. Operate each seat heater switch and check that continuity ...