P0A98 Hybrid Battery Pack Cooling Fan 2 Stuck

P0A98 Possible Causes

  • Hybrid battery pack cooling fan 2 faulty
  • Hybrid battery cooling fan 2 circuit open or shorted
  • Poor electrical connection in hybrid battery cooling fan 2 circuit

What Does It Mean?

How to Fix Code P0A98

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.

P0A98 Possible Symptoms

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

P0A98 Meaning

The engine control module (ECM) monitors the hybrid battery cooling fan 2. The ECM sets the OBDII code when the hybrid battery cooling fan 2 does not meet factory specifications.

OBDII Code P0A98 – Hybrid Battery Pack Cooling Fan 2 Stuck

P0A99 Low Value of Hybrid Battery Cooling Fan 2 Control Circuit

P0A99 Possible Causes

  • Hybrid battery pack cooling fan 2 faulty
    Hybrid battery cooling fan 2 circuit open or shorted
    Poor electrical connection in hybrid battery cooling fan 2 circuit

What Does It Mean?

How to Fix Code P0A99

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

P0A99 Possible Symptoms

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

P0A99 Meaning

The engine control module (ECM) monitors the hybrid battery pack cooling fan 2. The ECM sets the OBDII code when the hybrid battery pack cooling fan 2 does not meet factory specifications.

P0A9A High Hybrid Battery Pack Cooling Fan Control Circuit

P0A9A Possible Causes

  • Hybrid battery pack cooling fan 2 faulty
  • Hybrid battery cooling fan 2 circuit open or shorted
  • Poor electrical connection in hybrid battery cooling fan 2 circuit

What Does It Mean?

How to Fix Code P0A9A

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.

P0A9A Possible Symptoms

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

P0A9A Meaning

The engine control module (ECM) monitors the hybrid battery pack cooling fan 2. The ECM sets the OBDII code when the hybrid battery pack cooling fan 2 does not meet factory specifications.

Hybrid Battery Temperature Sensor “A” Circuit

P0A9B Possible Causes

  • Faulty HV battery assembly (HV battery temperature sensor)
  • HV battery assembly harness is open or shorted
  • Poor electrical connection in the HV battery assembly circuit
  • Faulty battery intelligent unit

What Does It Mean?

How to Fix Code P0A9B

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.

P0A9B Possible Symptoms

Engine light on (or service engine soon warning light)

P0A9B Meaning

Battery temperature sensors are provided at 3 locations in the HV battery. The thermistor resistance, built into each battery temperature sensor, varies with changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance.

The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on the results of this detection, the power management control ECU controls the fan. (The fan starts when the HV battery temperature exceeds a predetermined level.)

OBDII Code P0A9B – Hybrid Battery Temperature Sensor ‘A’ Circuit

Hybrid Battery Temperature Sensor “A” Range/Performance

P0A9C Possible Causes

  • Faulty HV battery assembly (HV battery temperature sensor)
  • HV battery assembly wiring harness open or shorted
  • Poor electrical connection in HV battery assembly circuit
  • Faulty battery intelligent unit

What Does It Mean?

How to Fix Code P0A9C

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.

P0A9C Possible Symptoms

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

P0A9C Meaning

Battery temperature sensors are provided at 3 locations in the HV battery. The thermistor resistance, built into each battery temperature sensor, varies according to changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on the detection results, the power management control ECU controls the fan motor. (The fan motor starts when the HV battery temperature exceeds a predetermined level.)

P0A9D Low Hybrid Battery Temperature Sensor Circuit “A

P0A9D Possible Causes

  • Faulty HV battery assembly (HV battery temperature sensor)
  • HV battery assembly harness is open or shorted
  • Poor electrical connection in HV battery assembly circuit
  • Faulty battery intelligent unit

What Does It Mean?

How to Fix Code P0A9D

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.

P0A9D Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P0A9D Meaning

Battery temperature sensors are provided at 3 locations in the HV battery. The thermistor resistance, built into each battery temperature sensor, varies according to changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on this detection result, the power management control ECU controls the fan motor. (The fan motor starts when the HV battery temperature exceeds a predetermined level.)

P0A9E Hybrid Battery Temperature Sensor “A” Circuit High

P0A9E Possible Causes

  • Faulty HV battery assembly (HV battery temperature sensor)
  • HV battery assembly harness is open or shorted
  • Poor electrical connection in HV battery assembly circuit
  • Faulty battery intelligent unit

What Does It Mean?

How to Fix Code P0A9E

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.

P0A9E Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P0A9E Meaning

Battery temperature sensors are provided at 3 locations in the HV battery. The thermistor resistance, built into each battery temperature sensor, varies according to HV battery temperature changes. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on this detection result, the power management control ECU controls the fan motor. (The fan motor starts when the HV battery temperature exceeds a predetermined level.)

P0A9F Hybrid Battery Temperature Sensor Circuit “A” Intermittent/Erratic

P0A9F Possible Causes

  • Faulty HV battery assembly (HV battery temperature sensor)
  • HV battery assembly harness is open or short-circuited
  • Poor electrical connection of HV battery assembly circuit
  • Faulty battery intelligent unit

What Does It Mean?

How to Fix Code P0A9F

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.

P0A9F Possible Symptoms

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

P0A9F Meaning

The battery temperature sensors are provided at 3 locations of the HV battery. The thermistor resistance, built into each battery temperature sensor, varies according to changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on the detection results, the power management control ECU controls the fan. (The fan starts when the HV battery temperature exceeds a predetermined level.)

P0AA0 Hybrid Battery Positive Contactor Circuit

P0AA0 Possible Causes

  • Faulty system main relay
  • System main relay harness is open or shorted
  • Poor electrical connection in the system main relay circuit
  • Faulty HV control ECU

What Does It Mean?

How to Fix Code P0AA0

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.

P0AA0 Possible Symptoms

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

P0AA0 Meaning

The SMRs (System Main Relays) connect and disconnect the high voltage power circuit according to requests from the HV control ECU. To ensure reliable operation, they consist of a total of 3 relays (1 for the negative side and 2 for the positive side).
To connect, SMR1 and SMR3 initially turn on. Then, SMR2 activates and SMR1 turns off. This process protects the circuit from high voltage inrush current by allowing limited current to flow through the resistor. To disconnect, SMR2 and SMR3 turn off in that order. The HV control ECU verifies that the relays have properly closed.
The HV control ECU monitors the proper operation of the SMRs (CON1, CON2, and CON3) to check for malfunction.

P0AA1 Hybrid Battery Positive Contactor Circuit Stuck Closed

P0AA1 Possible Causes

  • Faulty system main relay
  • System main relay circuit open or shorted
  • Poor electrical connection in system main relay circuit
  • Faulty HV control ECU

What Does It Mean?

How to Fix P0AA1 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.

P0AA1 Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P0AA1 Meaning

SMRs (System Main Relays) connect and disconnect the high voltage power circuit according to requests from the HV control ECU. To ensure reliable operation, they consist of a total of 3 relays (1 for negative side and 2 for positive side).

To connect, SMR1 and SMR3 initially turn on. Then SMR2 activates and SMR1 turns off. This process protects the circuit from high voltage surge current by allowing limited current to flow through the resistor. To disconnect, SMR2 and SMR3 turn off in that order. The HV control ECU verifies that the relays have properly closed.
The HV control ECU monitors the proper operation of SMRs (CON1, CON2 and CON3) to check for malfunction.