Service bulletin PS496

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10116104
Published by NHTSA	2017-08-25
Manufacturer's number	PS496
Manufacturer's date	2017-06-08
NHTSA component	POWER TRAIN:AUTOMATIC TRANSMISSION; EQUIPMENT ADAPTIVE/MOBILITY

NHTSA's summary

PITSTOP: CUSTOMER TIP: ACCELERATOR PEDAL FUNCTION/DESCRIPTION - On all K900 (KH), Cadenza (VG, YG), and Optima (JF, JFa, JF-HEV, JF-PHEV) vehicles, the accelerator pedal features a small detent with a spring to provide increased resistance to help avoid unnecessary fuel consumption when applying full throttle. When the driver depresses the pedal beyond the resistance where the detent is felt (above 85% WOT), the pedal will easily reach WOT and kickdown shift will occur accordingly. For additional information, refer to the individual vehicle?s Owner?s Manual under section ?Driving Your Vehicle? ? Automatic Transmission (Drive).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Equipment and accessories, Transmission and driveline, Automatic transmission

Vehicles listed
KIA CADENZA	2014, 2015, 2016, 2017
KIA K900	2015, 2016, 2017
KIA OPTIMA	2016, 2017
KIA OPTIMA HYBRID	2017 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PS056	2021-06-14. Service bulletin. TCM Upgrade - Shift Logic Improvement
TSBTRA059_R4	2018-05-14. Service bulletin. TSB - HCU/TCU UPGRADE ? FOR 100MESH SOLENOID - EQUIPPED HYBRID TRANSMISSIONS - This bulletin has been revised to include additional information. This bulletin provides information related to a software upgrade of the Hybrid Control Unit (HCU) and the Transmission Control Unit (TCU) of some 2011-2016MY Optima Hybrid (TF HEV) after replacement of the transmission with improved 100 mesh solenoids has taken place.
TSBTRA075	2018-03-13. Service bulletin. TSB - SERVICE ACTION: TRANSMISSION GEAR SHIFT LOGIC IMPROVEMENT (SA337) - This bulletin provides the procedure to improve the logic of the Transmission Control Unit (TCU) on some 2017-2018MY Cadenza (YG) vehicles, produced from June 2, 2016 through August 18, 2017, which may experience unusual 5th gear engagement instead of 1st gear after starting the engine and shifting from Park (P) to Drive (D).
TSBTRA072A_R2	2018-03-13. Service bulletin. TSB - SERVICE ACTION: INHIBITOR SWITCH - REPLACEMENT (SA317A) - This bulletin has been revised to include additional information. - This bulletin provides the procedure to replace the inhibitor switch on some 2017MY Optima (JFa), Sorento (UMa), Optima Hybrid (HEV), Optima Plug-in Hybrid (PHEV), Sportage (QL), Forte (YD), and Sedona (YP), and some 2016-2017MY Optima (JF) vehicles, equipped with a front wheel drive 6-speed transmission, which may experience the following concerns: ? Malfunction Indicator Lamp (MIL) ON with DTC P0705 - Transmission Range Sensor (TRS) Circuit Malfunction (active or history) ? CAN-related DTCs (For both Hybrids: CAN DTC C2243); ? Intermittent no crank/no start ? Erratic or harsh shifting; ? EPB and Hold lights illuminated intermittently; ? ?Key OFF? indicated after placing the selector lever into the ?P? position and depressing the Start/Stop button.Note: When this condition occurs, the ?P? position is not indicated on the instrument cluster.
TSBTRA072A_R1	2018-02-12. Service bulletin. TSB - SERVICE ACTION: INHIBITOR SWITCH REPLACEMENT (SA317A) - This bulletin provides the procedure to replace the inhibitor switch on some 2017MY Optima (JFa), Sorento (UMa), Optima Hybrid (HEV), Optima Plug-in Hybrid (PHEV), Sportage (QL), Forte (YD), and Sedona (YP) vehicles, equipped with a front wheel drive 6-speed transmission, which may experience the concerns listed below. These concerns may be due to the inhibitor switch not allowing the correct gear position signal to be sent to various control units.
PS430_CLOSED	2018-01-16. Service bulletin. PS430 CLOSED. REFER TO TSB TRA067.
TSBTRA069R1	2017-08-25. Service bulletin. TSB: COMBINATION TSB / SERVICE ACTION: SHIFT QUALITY IMPROVEMENT (SA292A) - This bulletin provides the procedure to improve the logic of the Transmission Control Unit (TCU) on some 2016MY Optima (JFa) 2.0T, produced from September 11, 2015 through October 6, 2016, 2016MY Sorento (UMa) 2.0T, produced from October 23, 2014 through April 18, 2016, Sorento (UMa) 2.4L, produced from November 18, 2014 through January 19, 2016, and Sorento (UMa) 3.3L vehicles, produced from October 23, 2014 through April 18, 2016, which may experience a shift quality concern, such as a harsh downshift, upshift, and/or shift delay. To correct this concern, apply the improved logic to the TCU using the KDS download as described in this bulletin.
TSBENG168	2017-08-02. Service bulletin. TSB: COMBINATION TSB/SERVICE ACTION: IDLE STABILITY & SHIFT QUALITY IMPROVEMENT (SA294) - This bulletin provides the procedure to improve the logic of the Electronic Control Unit (ECU) and the Transmission Control Unit (TCU) on some 2016MY Optima (JFa) vehicles, produced from September 3, 2015 through November 22, 2016, which may experience a vibration and/or hesitation when releasing the brake pedal after coming to stop, and/or a shift quality concern, such as a harsh downshift, upshift, and/or shift delay. To correct this concern, apply the improved logic to the ECU and TCU using KDS download as described in this bulletin.
TSB-TRA054R1	2017-08-02. Service bulletin. TSB: COMBINED TSB/SERVICE ACTION: K900 (KH) SHIFT LOGIC IMPROVEMENT - TCM UPGRADE (SA174) - This bulletin provides information related to an upgrade of the TCM software for 2015MY K900 vehicles, produced prior to April 30, 2014, which may exhibit a ?rough shift feeling? concern, particularly when downshifting from third to second gear.
TSBTRA051R1	2017-01-27. Service bulletin. TSB: 6 SPD A/T SOLENOID REPLACEMENT – MULTIPLE DTCS - THIS BULLETIN PROVIDES INFORMATION RELATING TO THE REPLACEMENT OF VARIOUS SHIFT SOLENOIDS ON 6-SPEED AUTOMATIC TRANSAXLES WITH DTCS P0741, P0743, P0748, P0753, P0758, P0763, P0768, P0773, P1778 AND P2709. REPLACE THE SOLENOIDS IF CURRENT OR HISTORY CODES ARE PRESENT; DO NOT REPLACE THE TRANSAXLE. TO REDUCE VEHICLE REPAIR TIME, THIS PROCEDURE CAN BE PERFORMED WITH THE TRANSAXLE INSTALLED IN THE VEHICLE. REFER TO KGIS FOR SOLENOID PACK REMOVAL AND REINSTALLATION PROCEDURES FOR THE SPECIFIC YEAR AND MODEL OF THE VEHICLE.