P0A3C · Manufacturer communications

FORD · 2025-09-19

This article supersedes TSB 23-2316 to update the Service Procedure and labor operations from M-Time to AP-Time and add a limit. Some of the vehicles listed in the Model statement above, may exhibit an illuminated powertrain temperature warning lamp accompanied by a "Motor Coolant Over Temperature" message in the instrument panel cluster (IPC) with DTC P0A3C:94 stored in either the secondary on-board diagnostic control module B (SOBDMB) and/or the secondary on-board diagnostic control module C (SOBDMC). This may be due to the software within either the SOBDMB and/or SOBDMC.

KIA · 2024-12-23

TECHNICAL SERVICE BULLETIN: SERVICE ACTION: MOTOR CONTROL UNIT (MCU) LOGIC IMPROVEMENT (SA596) - This bulletin provides the procedure to update the Motor Control Unit (MCU) software on certain 2025MY Sorento HEV (MQ4 HEV) vehicles equipped with 19” wheels and produced from March 4, 2024 through November 9, 2024. The affected vehicles may exhibit traction motor noise, an inoperable A/C, and illuminated warning lights with DTCs P0A3C, P0AF0, P1B77 stored due to intermittent traction motor operation when the hybrid system powers ‘OFF’ during the engine clutch calibration procedure.

FORD · 2023-10-04

Some 2022-2023 F-150 Lightning vehicles may exhibit an illuminated powertrain temperature warning lamp accompanied by a Motor coolant over temperature message in the instrument panel cluster (IPC) with DTC P0A3C:94 stored in either the secondary on-board diagnostic control module B (SOBDMB) and/or the secondary on-board diagnostic control module C (SOBDMC). This may be due to the software within either the SOBDMB and/or SOBDMC. To correct this condition, follow the Service Procedure to bring both modules to the latest software level.

FORD · 2023-07-03

Some 2022-2023 F-150 Lightning vehicles may exhibit diagnostic trouble code P0A3C:94 stored in either the secondary on-board diagnostic control module B (SOBDMB) and/or secondary on-board diagnostic control module C (SOBDMC). This may be due to the software within either the SOBDMB and/or SOBDMC. Engineering is currently working on a solution that is expected in November 2023. Inform the customer they can continue to drive the vehicle. Monitor OASIS for additional updates.

ACURA · 2020-12-18

"Service Bulletin - The motor power inverter (MPI), also known as the intelligent inverter unit (IIU), may fail over time due to a defective solder joint. This failure may result in one or more of the following DTC(s): -P1440 (MPI Module Output Circuit Malfunction) -P1437 (MPI Module Short Circuit) -P15A5 (Motor Current Sensor Circuit Malfunction) -P0A78 (MPI Module Internal Circuit Malfunction) -P0AE1 (Bypass Contractor Malfunction) -P0A3C (Motor Control Module (MCM) Overheating) -P0A3F (Motor Rotor Position Sensor Circuit Malfunction) -P0DA8 (MPI Module Voltage Malfunction) -P1634 (MPI Module Signal Circuit Malfunction) -P0AEE (MPI Internal Circuit Malfunction) -P0A27 (High Voltage Contactor Stays Activated) American Honda is extending the warranty coverage of the motor power inverter…

HONDA · 2020-12-18

"Service Bulletin - The Motor Power Inverter (MPI), also known as the Intelligent Inverter Unit (IIU), may fail over time due to a defective solder joint. This failure may result in one or more of the following DTC(s): -P1440 (MPI Module Output Circuit Malfunction) -P1437 (MPI Module Short Circuit) -P15A5 (Motor Current Sensor Circuit Malfunction) -P0A78 (MPI Module Internal Circuit Malfunction) -P0AE1 (Bypass Contractor Malfunction) -P0A3C (Motor Control Module (MCM) Overheating) -P0A3F (Motor Rotor Position Sensor Circuit Malfunction) -P0DA8 (MPI Module Voltage Malfunction) -P1634 (MPI Module Signal Circuit Malfunction) -P0AEE (MPI Internal Circuit Malfunction) -P0A27 (High Voltage Contactor Stays Activated) American Honda is extending the warranty coverage of the motor power inverter…

KIA · 2019-09-16

TSB: COMBINATION TSB / SERVICE ACTION: COOLANT LEAK – OBC INLET HOSE DETACHING (SA365) - This bulletin has been revised to include additional information.This bulletin provides the procedure to install an onboard charger (OBC) quick disconnect spacer on some 2018-2019MY Niro (DE PHEV) vehicles, produced from March 21, 2018 through August 22, 2018, which may experience the OBC coolant inlet hose detaching. If detached, the following Hybrid System/Refill Inverter Coolant Warning(s) and/or HV DTCs may set: P0A93, P0A3C, and/or P0A3E.

KIA · 2018-12-21

TSB -COMBINATION TSB / SERVICE ACTION: COOLANT LEAK ? OBC INLET HOSE DETACHING (SA365) - This bulletin provides the procedure to install an onboard charger (OBC) quick disconnect spacer on some 2018-2019MY Niro (DE PHEV) vehicles, produced from March 21, 2018 through August 22, 2018, which may experience the OBC coolant inlet hose detaching. If detached, the following Hybrid System/Refill Inverter Coolant Warning(s) and/or HV DTCs may set: P0A93, P0A3C, and/or P0A3E. Follow the procedure in this bulletin to install a spacer at the OBC coolant inlet hose. Before conducting the procedure, verify that the vehicle is included in the list of affected VINs.

FORD · 2005-03-07

ELECTRIC MOTOR TEMPERATURE INDICATOR LAMP ON - POSSIBLE DIAGNOSTIC TROUBLE CODES (DTCS) P0A2F, P0A3B, P0A3C, P0A3E, P0A7C. *TT