P0A0B High Voltage System Interlock Circuit Performance
P0A0B Possible Causes
Faulty high voltage system interlock
High voltage system interlock circuit open or shorted
Poor electrical connection in high voltage system interlock circuit
What Does It Mean?
First Diagnose P0A0B Code
Check the “Possible Causes” listed above. Visually inspect related cable harnesses and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0A0B Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P0A0B Description
The diagnostic trouble code (DTC) monitors the detected voltage when the control voltage is high to determine if the circuit is faulty.
P0A0C High Voltage System Interlock Circuit Low
P0A0C Possible Causes
Faulty high voltage system lock
High voltage system lock circuit open or shorted
Poor electrical connection in high voltage system lock circuit
What Does It Mean?
First Diagnose Code P0A0C
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.
P0A0C Possible Symptoms
Engine light on (or service engine soon warning light)
P0A0C Description
The diagnostic trouble code (DTC) monitors the detected voltage when the control voltage is high to determine if the circuit is faulty.
P0A0D High Voltage System Interlock Circuit
P0A0D TOYOTA Possible Causes
Faulty Power Management Control ECU Service Plug Connector Faulty Inverter with Converter Assembly Inverter with Converter Harness is Open or Shorted Inverter with Converter Assembly Circuit Poor Electrical Connection Frame Wire Inverter Terminal Cover
What Does It Mean?
First Diagnose P0A0D TOYOTA 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.
P0A0D TOYOTA Technical Notes
What Does It Mean?
P0A0D TOYOTA
Possible Symptoms
Engine Light On (or Service Engine Soon Warning Light)
P0A0D Toyota Description
When the Power Management Control ECU detects that a safety device is activated, it prohibits the hybrid system from operating or cuts off the main system relay. There are four safety devices in three different locations. The first safety device is located on the service plug handle. The second is located at the frame wire that is connected to the inverter with a converter. The third is located on the inverter terminal cover where the motor and generator cables and motor wire No. 2 (air conditioning harness) are connected to the inverter with a converter. If the service plug handle, inverter terminal cover, or frame wire is removed, the interlock signal line will be open. If the vehicle is driven, this condition will be determined as an open circuit and the main system relays will not close. If the safety devices are reinstalled correctly, the system will return to normal when the power switch is in the ON (IG) position.
P0A0E Intermittent High Voltage System Interlock Circuit
P0A0E Possible Causes
Faulty high voltage system interlock
High voltage system interlock circuit open or shorted
Poor electrical connection in high voltage system interlock circuit
What Does It Mean?
P0A0E Code First Diagnosis
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.
P0A0E Possible Symptoms
Check engine light illuminated (or service engine soon warning light)
P0A0E Description
The diagnostic trouble code (DTC) monitors the detected voltage when the control voltage is high to determine if the circuit is faulty.
P0A0F Engine Could Not Start
P0A0F TOYOTA Possible Causes
SFI System
Faulty Power Management Control ECU
What Does It Mean?
How to Fix P0A0F TOYOTA Code
Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
P0A0F TOYOTA Technical Notes
What Does It Mean?
P0A0F TOYOTA Possible Symptoms
Engine light on (or service engine soon warning light)
P0A0F TOYOTA Meaning
The HV control ECU detects this DTC and performs safety control when the engine or transaxle seizes or if foreign objects are caught in either of them.
In case of engine malfunction, an engine malfunction signal is sent from the ECM to the Power Management Control ECU (HV CPU). When the Power Management Control ECU (HV CPU) receives this signal, it sets a DTC and performs safety control.
P0A10 High DC/DC Converter Status Circuit
P0A10 Possible Causes
Faulty DC/DC converter
DC/DC converter harness is open or shorted
Poor electrical connection in the DC/DC converter circuit
Faulty Powertrain Control Module (PCM)
What Does It Mean?
First Diagnose Code P0A10
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.
P0A10 Possible Symptoms
Engine light on (or service engine soon warning light)
P0A10 Description
The Powertrain Control Module (PCM) controls the hardwired DC/DC activation signal to turn the DC/DC converter on and off. The DC/DC converter provides feedback to the PCM using the hardwired DC/DC fault signal. The DC/DC fault signal informs the PCM when the converter is not operational or when a fault has occurred.
P0A11 DC/DC Converter Actuator Circuit / Open
P0A11 Possible Causes
Faulty DC/DC converter
DC/DC converter harness is open or shorted
Poor electrical connection in the DC/DC converter circuit
Faulty Powertrain Control Module (PCM)
What Does It Mean?
How to Fix Code P0A11
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.
P0A11 Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P0A11 Meaning
The Powertrain Control Module (PCM) controls the hardwired DC/DC enable signal to turn the DC/DC converter on and off. The DC/DC converter provides feedback to the PCM using the hardwired DC/DC fault signal. The DC/DC fault signal informs the PCM when the converter is not operational or when a fault has occurred.
P0A12 DC/DC Converter Activation Circuit Low
P0A12 Possible Causes
Faulty DC/DC converter
DC/DC converter harness is open or shorted
Poor electrical connection in the DC/DC converter circuit
Faulty Powertrain Control Module (PCM)
What Does It Mean?
First Diagnose Code P0A12
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.
P0A12 Possible Symptoms
Engine light on (or service engine soon warning light)
P0A12 Description
The Powertrain Control Module (PCM) controls the hardwired DC/DC enable signal to turn the DC/DC converter on and off. The DC/DC converter provides feedback to the PCM using the hardwired DC/DC fault signal. The DC/DC fault signal informs the PCM when the converter is not operational or when a fault has occurred.
P0A13 High DC/DC Converter Activation Circuit
P0A13 Possible Causes
Faulty DC/DC converter
DC/DC converter harness is open or shorted
Poor electrical connection in DC/DC converter circuit
Faulty Powertrain Control Module (PCM)
What Does It Mean?
First Diagnose Code P0A13
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.
P0A13 Possible Symptoms
Engine light on (or service engine soon warning light)
P0A13 Description
The Powertrain Control Module (PCM) controls the hardwired DC/DC enable signal to turn the DC/DC converter on and off. The DC/DC converter provides feedback to the PCM using the hardwired DC/DC fault signal. The DC/DC fault signal informs the PCM when the converter is not operational or when a fault has occurred.
P0A14 Motor Mounting “A” Control Circuit / Open
Error Code P0A14: Problems and Solutions
Meaning of Code P0A14
The P0A14 code is related to the motor mount “A” control circuit.
The Engine Control Module (ECM) monitors this system and triggers this error code when the motor mount circuit does not meet factory specifications. This may indicate an electrical issue or a mechanical fault in the motor mount.
Possible Symptoms
Check engine light on (or “Service Engine Soon” warning light).
Possible Causes
Faulty motor mount “A”.
Open or short circuit in motor mount “A” wiring harness.
Poor electrical connection in motor mount “A” circuit.
How to Fix Code P0A14?
Visually inspect the wiring harness and associated connectors.
Check for damaged components.
Look for broken, bent, pushed out, or corroded connector pins.
Test the motor mount to verify proper operation.
Check circuit voltage and continuity using a multimeter.
If the problem persists after these checks, it may be necessary to replace the motor mount or consult a professional for further diagnosis.
