Abs HECU Replacement Due To Hesitation Concerns (PS422)
WARNING: This page is about the Optima EX, 2.0L Eng VIN 6, which is a different variant/trim than selected.
Publication date: 2015-07-01Reference number: PS422
ABS HECU REPLACEMENT DUE TO HESITATION CONCERNS
TECHNICAL SERVICE BULLETIN
Reference Number(s): PS422, Date of Issue:
July 2015
| KIA: | 2012-2013MY Optima (QF/TF) |
| GROUP: | Electrical |
SERVICE INFORMATION
When addressing customer concerns regarding hesitation from the vehicle on hard acceleration, test drive the vehicle to verify the concern. Prior to test driving the vehicle, eliminate common Electronic Stability Control (ESC) trigger factors such as excessive or unevenly worn tires and slippery road conditions. If during hard acceleration testing the ESC light illuminates on the dash and abnormal hesitation is experienced, replace the ABS Hydraulic Electronic Control Unit (HECU) with a module containing the latest S/W version, as shown in the table and image below.
NOTE:
always verify latest applicable P/N information using EPC.
| Configuration | Part Number | Old S/W Version | New S/W Version |
|---|---|---|---|
| ABS HECU w/o EPB equipped | 58920 2T550 | 1.4 | 1.5 |
| ABS HECU with EPB equipped (SXL only) | 58920 4C550 | 1.6 | 1.7 |