P0C3F Possible Causes

• Faulty inverter with converter assembly

What Does It Mean?

How to Fix P0C3F Code

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.

P0C3F Possible Symptoms

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

P0C3F Meaning

The MG ECU detects the boost converter temperature using the temperature sensor integrated into the boost converter. The boost converter using the temperature sensor delivers a voltage that varies between 0.5 and 4.5 V in response to temperature changes. The higher the boost converter temperature, the lower the output voltage. Conversely, the lower the boost converter temperature, the higher the output voltage. The MG ECU limits the load based on signals sent by the boost converter temperature sensor to help prevent overheating. The MG ECU also detects malfunctions in the boost converter temperature sensor and its wiring.

P0C40 Possible Causes

• Faulty inverter with converter assembly

What Does It Mean?

How to Fix Code P0C40

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.

P0C40 Possible Symptoms

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

P0C40 Meaning

The MG ECU detects the boost converter temperature using the temperature sensor integrated into the boost converter. The boost converter using the temperature sensor delivers a voltage that varies between 0.5 and 4.5 V in response to temperature changes. The higher the boost converter temperature, the lower the output voltage. Conversely, the lower the boost converter temperature, the higher the output voltage. The MG ECU limits the load based on signals sent by the boost converter temperature sensor to help prevent overheating. The MG ECU also detects malfunctions in the boost converter temperature sensor and its wiring.

P0C41 Possible Causes

• Faulty inverter with converter assembly

What Does It Mean?

How to Fix Code P0C41

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.

P0C41 Symptoms

Possible

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

P0C41 Meaning

The MG ECU detects the boost converter temperature using the temperature sensor integrated into the boost converter. The boost converter using the temperature sensor delivers a voltage that varies between 0.5 and 4.5 V in response to temperature changes. The higher the boost converter temperature, the lower the output voltage. Conversely, the lower the boost converter temperature, the higher the output voltage. The MG ECU limits the load based on signals sent by the boost converter temperature sensor to help prevent overheating. The MG ECU also detects malfunctions in the boost converter temperature sensor and its wiring.

P0C42 Possible Causes

• Faulty hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness is open or shorted
• Poor electrical connection in hybrid battery pack coolant temperature sensor circuit

What Does It Mean?

How to Fix Code P0C42

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

P0C42 Symptoms

Possible symptoms

Illuminated check engine light (or service engine soon warning light)

P0C42 Meaning

The engine control module (ECM) monitors the hybrid battery pack coolant temperature sensor. The ECM sets the OBDII code when the hybrid battery pack coolant temperature sensor does not meet factory specifications.

P0C43 Possible Causes

• Faulty hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness is open or shorted
• Poor electrical connection in hybrid battery pack coolant temperature sensor circuit

What Does It Mean?

How to Fix Code P0C43

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.

P0C43 Possible Symptoms

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

P0C43 Meaning

The engine control module (ECM) monitors the hybrid battery pack coolant temperature sensor. The ECM sets the OBDII code when the hybrid battery pack coolant temperature sensor does not meet factory specifications.

P0C44 Possible Causes

• Faulty hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness is open or shorted
• Poor electrical connection in hybrid battery pack coolant temperature sensor circuit

What Does It Mean?

How to Fix Code P0C44

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.

P0C44 Possible Symptoms

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

P0C44 Meaning

The engine control module (ECM) monitors the hybrid battery pack coolant temperature sensor. The ECM sets the OBDII code when the hybrid battery pack coolant temperature sensor does not meet factory specifications.

P0C45 Possible Causes

• Faulty hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness is open or shorted
• Hybrid battery pack coolant temperature sensor circuit poor electrical connection

What Does It Mean?

How to Fix Code P0C45

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.

P0C45 Possible Symptoms

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

P0C45 Meaning

The engine control module (ECM) monitors the hybrid battery pack coolant temperature sensor. The ECM sets the OBDII code when the hybrid battery pack coolant temperature sensor is not within factory specifications.

P0C46 Possible Causes

• Faulty hybrid battery pack coolant temperature sensor
• Hybrid battery pack coolant temperature sensor harness is open or shorted
• Poor electrical connection in hybrid battery pack coolant temperature sensor circuit

What Does It Mean?

How to Fix Code P0C46

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.

P0C46 Possible Symptoms

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

P0C46 Meaning

The engine control module (ECM) monitors the hybrid battery pack coolant temperature sensor. The ECM sets the OBDII code when the hybrid battery pack coolant temperature sensor does not meet factory specifications.

P0C47 Possible Causes

• Faulty hybrid/EV battery cooling pump
• Hybrid/EV battery cooling pump wiring harness open or shorted
• Poor electrical connection in hybrid/EV battery cooling pump circuit

What Does It Mean?

How to Fix Code P0C47

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.

P0C47 Possible Symptoms

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

P0C47 Meaning

The hybrid/EV battery pack cooling pump circulates coolant through the drive motor battery cooling radiator, drive motor battery cooling cooler, and hybrid/EV battery pack to control the temperature of the hybrid/EV battery pack. An activation signal from the hybrid/EV powertrain control module 2 to the hybrid/EV battery pack cooling pump provides overall pump control. When this circuit is high, the pump can operate. The pump is controlled by a pulse width modulated signal from the hybrid/EV powertrain control module 2 to the hybrid/EV battery pack cooling pump. The higher the duty cycle, the higher the pump speed. The hybrid/EV battery cooling pump provides a hardwired pulse width modulated feedback signal to the hybrid/EV powertrain control module 2. During normal operation, this feedback signal provides pump speed information to the hybrid/EV powertrain control module 2. The hybrid/EV battery pack cooling pump has self-diagnostic capability. If the hybrid/EV battery cooling pump determines there is an internal fault, it provides this information on this same feedback circuit instead of the pump speed information.

P0C48 Possible Causes

• Faulty hybrid battery cooling pump
• Hybrid battery cooling pump wiring harness open or short circuit
• Poor electrical connection in hybrid battery module cooling pump circuit

What Does It Mean?

How to Fix Code P0C48

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.

P0C48 Possible Symptoms

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

P0C48 Meaning

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