P0B4A Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B4A Code

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B4A Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B4A Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The battery cross section is section number three, it consists of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually serviceable components.

The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B4B Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B4B Code

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B4B Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B4B Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The battery cross-section is section number three, it consists of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B4C Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B4C Code

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B4C Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B4C Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The cross-section of the battery is section number three, it consists of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B4D Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B4D Code

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B4D Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B4D Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The battery cross section is section number three, it consists of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B4E Possible Causes

• Faulty intelligent battery unit
• Defective HV battery assembly

What Does It Mean?

How to Fix Code P0B4E

Check the “possible causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B4E Possible Symptoms

Engine light on (or service engine soon warning light)

P0B4E Meaning

The HV battery uses nickel-metal hydride batteries and does not require external charging. The power management control ECU maintains the HV battery’s SOC (state of charge) at a constant level during driving. The HV battery consists of 28 modules, with each module containing eight 1.2V cells connected in series. The intelligent battery unit monitors the battery block voltage at 14 locations. Each battery block consists of 2 modules in an assembly. The intelligent battery unit, which monitors battery block voltages, determines that a malfunction has occurred if the voltage difference between battery blocks exceeds the standard. When the malfunction detection condition is met, the power management control ECU (HV CPU) illuminates the malfunction indicator light (MIL) and sets a diagnostic trouble code (DTC).

P0B4F Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B4F Code

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B4F Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B4F Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The battery cross-section is section number three, it consists of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B50 Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B50 Code

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B50 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B50 Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The cross-section of the battery is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A repairable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, the battery energy control module wiring harness, the auxiliary battery wiring harness, and the battery energy control module are all considered repairable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B51 Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix Code P0B51

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B51 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B51 Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The cross-section of the battery is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B52 Possible Causes

• Defective hybrid/electric vehicle battery
• Faulty hybrid/electric vehicle battery interface control module

What Does It Mean?

How to Fix P0B52 Code

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B52 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B52 Meaning

The hybrid/electric vehicle battery contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V DC. The battery cells are also grouped into three sections. The first 90 cells/30 cell groups make up the first battery section. This section is adjacent to the hood and contains batteries 67 to 96. Battery section two is located behind section one. It consists of 72 cells/24 cell groups and contains batteries 43 to 66. The battery cross-section is section number three, it consists of the remaining 126 cells/42 cell groups and contains batteries 1 to 42. The three battery sections are individually repairable components.

The battery energy control module monitors the voltage of the 96 battery cell groups via the four hybrid/EV battery interface control modules. Voltage sensing circuits are attached to each individual cell group, and these sensing circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness connects this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module via the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.

The battery energy control module will determine when a fault condition is present. System diagnostics and status are communicated from the battery energy control module to the hybrid/EV powertrain control module 2 via serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

P0B53 Possible Causes

• Faulty battery smart unit
• Defective HV battery assembly

What Does It Mean?

How to Fix Code P0B53

Check the “possible causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0B53 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0B53 Meaning

The HV battery uses nickel-metal hydride batteries and does not require external charging. The power management control ECU maintains the HV battery SOC (state of charge) at a constant level during driving. The HV battery consists of 28 modules, with each module containing eight 1.2V cells connected in series. The battery smart unit monitors the battery block voltage at 14 locations. Each battery block consists of 2 modules in one assembly. The battery smart unit, which monitors battery block voltages, determines that a malfunction has occurred if the voltage difference between battery blocks exceeds the standard. When the malfunction detection condition is met, the power management control ECU (HV CPU) illuminates the malfunction indicator light (MIL) and sets a diagnostic trouble code (DTC).