P0A48 Possible Causes

• Faulty inverter with converter assembly
• Faulty hybrid vehicle generator assembly
• Faulty hybrid vehicle motor assembly
• Cable harness or connector

What Does It Mean?

How to Fix Code P0A48

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

P0A48 Possible Symptoms

Engine light on (or service engine soon warning light)

P0A48 Meaning

A resolver is a sensor used to detect the position of the magnetic poles of a motor-generator rotor. Knowledge of the pole position is essential to ensure precise control of MG2 and MG1.
Each resolver contains a stator with an excitation coil and 2 detection coils (S, C). The gap between the stator and rotor changes as the rotor rotates because the rotor is oval-shaped. An alternating current with a predetermined frequency flows through the excitation coil, and the S and C detection coils produce alternating currents according to the position of the sensor rotor.
The inverter with converter (MG ECU) detects the absolute position of the rotor based on the phases of the S and C detection coils and the heights of their waveforms. Additionally, the CPU calculates the amount of position change over a predetermined period of time to use the resolver as a speed sensor.
The MG ECU monitors signals from the motor resolver and detects malfunctions.

P0A49 Possible Causes

• Faulty inverter with converter assembly
• Faulty hybrid vehicle generator assembly
• Faulty hybrid vehicle motor assembly
• Wiring harness or connector

What Does It Mean?

How to Fix Code P0A49

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. P0A49

Possible Symptoms

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

P0A49 Meaning

A resolver is a sensor used to detect the position of the magnetic poles of a motor-generator rotor. Knowledge of the pole positions is essential to ensure precise control of MG2 and MG1.
Each resolver contains a stator with an excitation coil and 2 detection coils (S, C). The gap between the stator and rotor changes as the rotor rotates because the rotor is oval-shaped. An alternating current with a predetermined frequency flows through the excitation coil, and the S and C detection coils produce alternating currents according to the position of the sensor rotor.
The inverter with converter (MG ECU) detects the absolute position of the rotor based on the phases of the S and C detection coils and the heights of their waveforms. Additionally, the CPU calculates the amount of position change over a predetermined duration to use the resolver as a speed sensor.
The MG ECU monitors signals from the motor resolver and detects malfunctions.

P0A4A Possible Causes

• Faulty inverter with converter assembly
• Faulty hybrid vehicle generator assembly
• Faulty hybrid vehicle motor assembly
• Wiring harness or connector

What Does It Mean?

How to Fix Code P0A4A

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.

P0A4A Possible Symptoms

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

P0A4A Meaning

A resolver is a sensor used to detect the position of the magnetic poles of a motor-generator rotor. Knowing the pole position is essential for precise control of MG2 and MG1.
Each resolver contains a stator with an excitation coil and 2 detection coils (S, C). The gap between the stator and rotor changes as the rotor rotates because the rotor is oval-shaped. An alternating current with a predetermined frequency flows through the excitation coil, and the S and C detection coils produce alternating currents according to the sensor rotor position.
The inverter with converter (MG ECU) detects the absolute rotor position based on the phases of the S and C detection coils and their waveform heights. Additionally, the CPU calculates the amount of position change over a predetermined duration to use the resolver as a speed sensor.
The MG ECU monitors signals from the motor resolver and detects malfunctions.

P0A4B Possible Causes

• Faulty hybrid vehicle transaxle assembly (generator resolver)
• Hybrid vehicle transaxle assembly harness is open or shorted
• Poor electrical connection in hybrid vehicle transaxle assembly circuit
• Inverter with converter

What Does It Mean?

How to Fix Code P0A4B

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.

P0A4B Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P0A4B Meaning

A resolver is a sensor that detects the position of magnetic poles, essential for ensuring highly efficient control of MG2 and MG1.
The generator resolver structure and connection method with the inverter and converter are the same as those of the motor resolver.
The inverter with converter converts the output signals from the generator resolver and detects malfunctions.

P0A4C Possible Causes

• Faulty hybrid vehicle transaxle assembly (generator resolver)
• Hybrid vehicle transaxle assembly harness is open or shorted
• Poor electrical connection in hybrid vehicle transaxle assembly circuit
• Inverter with converter

What Does It Mean?

How to Fix Code P0A4C

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.

P0A4C Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P0A4C Meaning

A resolver is a sensor that detects the position of magnetic poles, essential for ensuring highly efficient control of MG2 and MG1.
The generator resolver structure and connection method with the inverter and converter are the same as those of the motor resolver.
The inverter with converter converts the output signals from the generator resolver and detects malfunctions.

P0A4D Possible Causes

• Faulty hybrid vehicle transaxle assembly (generator resolver)
• Hybrid vehicle transaxle assembly harness is open or shorted
• Poor electrical connection in hybrid vehicle transaxle assembly circuit
• Inverter with converter

What Does It Mean?

How to Fix Code P0A4D

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.

P0A4D Possible Symptoms

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

P0A4D Meaning

A resolver is a sensor that detects the position of magnetic poles, essential for ensuring highly efficient control of MG2 and MG1.
The generator resolver structure and connection method with the inverter and converter are the same as those of the motor resolver.
The inverter with converter converts the output signals from the generator resolver and detects malfunctions.
OBDII Code P0A4D – Generator Position Sensor Circuit Low

P0A4E Possible Causes

• Faulty hybrid vehicle generator
• Hybrid vehicle generator harness is open or shorted
• Poor electrical connection in the hybrid vehicle generator circuit

What Does It Mean?

How to Fix Code P0A4E

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.

P0A4E Possible Symptoms

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

P0A4E Meaning

The generator resolver detects the position of magnetic poles, essential for ensuring highly efficient control of MG1 and MG2. The construction of the generator resolver and how it’s connected to the HV control ECU are the same as those of the motor resolver.

P0A4F Possible Causes

• Faulty hybrid vehicle generator
• Hybrid vehicle generator harness is open or shorted
• Poor electrical connection of the hybrid vehicle generator circuit

What Does It Mean?

How to Fix Code P0A4F

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.

P0A4F Possible Symptoms

Engine light on (or service engine soon warning light)

P0A4F Meaning

The generator resolver detects the position of magnetic poles, essential for ensuring highly efficient control of MG1 and MG2. The construction of the generator resolver and how it is connected to the HV control ECU are the same as those of the motor resolver.

OBDII Code P0A50 – Generator Position Sensor Circuit Overspeed

Meaning of Code P0A50

The P0A50 error code indicates a problem with the generator position sensor circuit. This sensor, also called the generator resolver, detects the position of magnetic poles. This information is essential for the effective control of MG1 and MG2 motors in a hybrid system.

Possible Symptoms

• Check engine light on (or “service engine soon” warning light).

Possible Causes

• Faulty hybrid vehicle generator.
• Hybrid vehicle generator harness open or short circuit.
• Poor electrical connection of the hybrid vehicle generator circuit.

How to Fix Code P0A50?

1. Check the possible causes listed above.
2. Visually inspect the wiring harness and associated connectors.
3. Look for damaged components.
4. Check for broken, bent, pushed out, or corroded connector pins.

If in doubt, consult a professional for a thorough diagnosis.

P0A51 Possible Causes

• Drive Motor A Current Sensor faulty
• Drive Motor A Current Sensor harness open or shorted
• Electric Motor A Current Sensor circuit poor electrical connection

What Does It Mean?

How to Fix Code P0A51

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

P0A51 Possible Symptoms

Engine light on (or service engine soon warning light)

P0A51 Meaning

The Engine Control Module (ECM) monitors the Drive Motor ‘A’ Current Sensor. The ECM sets the OBDII code when the Drive Motor ‘A’ Current Sensor does not meet factory specifications.