PS328

Service Bulletin Details

Public Details for: PS328

Pitstop: hesitation in electric and gas modes - when diagnosing an optima hybrid with an off idle hesitation concern that can be duplicated, and no dtc(s) codes (active or history) are stored, access mcu > current data to check the status o


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2015 KIA OPTIMA HYBRID
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SUBJECT:
GROUP
ENG
MODEL
Optima Hybrid (TF HEV)
NUMBER
PS328
DATE
August 2014
HESITATION IN ELECTRIC AND GAS MODES
When diagnosing an Optima Hybrid with an off idle hesitation concern that can be duplicated,
and no DTC(s) codes (active or history) are stored, access MCU > Current Data to check the
status of the MCU warning flag (see image). If the flag is ON, the elevated temperatures in the
MCU system may cause a reduction in power from the electric motor; this in turn will affect
acceleration in both electric and gas modes. To correct this concern, check the Electric Water
Pump (EWP) for proper operation, along with the hoses for kinks and the radiator for damages,
blockages or pinholes. In the case below, a damaged radiator caused an overheating condition
and set the MCU warning flag ON.
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