P0A15 Low Motor Mount “A” Control Circuit

P0A15 Possible Causes

Faulty engine mount ‘A’
Engine mount ‘A’ circuit is open or shorted
Poor electrical connection in engine mount A circuit

What Does It Mean?

How to Fix Code P0A15

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.

P0A15 Possible Symptoms

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

P0A15 Meaning

The engine control module (ECM) monitors the engine mount control system. The ECM sets the OBDII code when the engine mount circuit does not meet factory specifications.

P0A16 Motor Mount “A” Control Circuit High

P0A16 Possible Causes

Faulty engine mount ‘A’
Engine mount ‘A’ circuit open or shorted
Poor electrical connection in engine mount A circuit

What Does It Mean?

How to Fix Code P0A16

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.

P0A16 Possible Symptoms

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

P0A16 Meaning

The engine control module (ECM) monitors the engine mount control system. The ECM sets the OBDII code when the engine mount circuit does not meet factory specifications.

Motor Torque Sensor Circuit P0A17

P0A17 Possible Causes

Faulty motor torque sensor
Motor torque sensor harness is open or shorted
Poor electrical connection in motor torque sensor circuit

What Does It Mean?

Initial Diagnosis of Code P0A17

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.

P0A17 Possible Symptoms

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

P0A17 Description

The Engine Control Module (ECM) monitors the motor torque sensor. The ECM sets the OBDII code when the motor torque sensor does not meet factory specifications.

P0A18 Motor Torque Sensor Circuit Range / Performance

P0A18 Possible Causes

Faulty motor torque sensor
Motor torque sensor harness is open or shorted
Poor electrical connection in the motor torque sensor circuit

What Does It Mean?

Initial Diagnosis of Code P0A18

P0A18 Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P0A18 Description

The Engine Control Module (ECM) monitors the motor torque sensor. The ECM sets the OBDII code when the motor torque sensor does not meet factory specifications.

Low Engine Torque Sensor Circuit

P0A19 Possible Causes

Faulty motor torque sensor
Motor torque sensor harness is open or shorted
Poor electrical connection in motor torque sensor circuit

What Does It Mean?

How to Fix Code P0A19

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.

P0A19 Possible Symptoms

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

P0A19 Meaning

The engine control module (ECM) monitors the motor torque sensor. The ECM sets the OBDII code when the motor torque sensor does not meet factory specifications.

P0A1A Generator Control Module

P0A1A TOYOTA Possible Causes

Faulty inverter with converter assembly
The inverter with converter harness is open or short-circuited
Inverter with converter assembly circuit poor electrical connection

What Does It Mean?

First Diagnose P0A1A TOYOTA 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.

P0A1A TOYOTA Technical Notes

Toyota recently released a warranty extension for 2010-2014 Prius, extending coverage for the inverter/converter intelligent power module.

Toyota Bulletin Information:

Toyota has received some reports that the Intelligent Power Module (IPM) located inside the hybrid system inverter assembly may fail. This condition is indicated by Hybrid System Diagnostic Trouble Codes (DTCs): P0A94, P324E, P3004 and/or P0A1A. If one or more of these trouble codes are detected, various warning lights on the dashboard also illuminate and the vehicle enters fail-safe mode.
Although the hybrid inverter assembly is covered by Toyota’s new vehicle limited warranty for 8 years or 100,000 miles (whichever comes first), we at Toyota care about customers’ ownership experience. Toyota is now extending warranty coverage for repairs related to Intelligent Power Module (IPM) failure.

When Is P0A1A TOYOTA Code Detected?

The MG ECU located in the inverter with converter assembly monitors its internal operation and sets DTCs when it detects malfunctions.
P0A1A TOYOTA

Possible Symptoms

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

P0A1A Toyota Description

The MG ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the MG ECU checks the result of the generator CPU self-test. If the MG ECU detects a failure from the generator CPU self-test, it will conclude there is an internal malfunction in the generator CPU. The Power Management Control ECU (HV CPU) will illuminate the MIL and set a DTC.

P0A1B Drive Motor “A” Control Module

P0A1B Possible Causes

Faulty inverter with converter assembly
Inverter with converter harness is open or short-circuited
Inverter with converter assembly circuit poor electrical connection

What Does It Mean?

First Diagnose Code P0A1B

When Is Code P0A1B Detected?

The MG ECU located in the inverter with the converter assembly monitors its internal operation and sets DTCs when it detects malfunctions.

P0A1B Possible Symptoms

Engine light on (or service engine soon warning light)

P0A1B Description

The MG ECU (in the inverter with converter assembly) performs many diagnostic tests to verify the proper functioning of internal ECU systems. In one of these tests, the MG ECU checks the result of the motor CPU self-test. If the MG ECU detects a failure from the motor CPU self-test, it will conclude that there is an internal malfunction in the motor CPU. The Power Management Control ECU (HV CPU) will illuminate the MIL and set a DTC.

P0A1C Drive Motor Control Module “B

P0A1C Possible Causes

Faulty inverter with converter assembly
Inverter with converter wiring harness open or short-circuited
Inverter with converter assembly circuit poor electrical connection

What Does It Mean?

First Diagnose Code P0A1C

When Is Code P0A1C Detected?

The MG ECU located in the inverter with the converter assembly monitors its internal operation and sets DTCs when it detects malfunctions.

P0A1C Possible Symptoms

Engine light on (or service engine soon warning light)

P0A1C Description

The MG ECU (in the inverter with converter assembly) performs many diagnostic tests to verify the proper functioning of internal ECU systems. In one of these tests, the MG ECU checks the result of the engine CPU self-test. If the MG ECU detects a failure from the engine CPU self-test, it will conclude that there is an internal malfunction in the engine CPU. The Power Management Control ECU (HV CPU) will illuminate the MIL and set a DTC.

Hybrid Powertrain Control Module P0A1D

P0A1D Possible Causes

Faulty HV control ECU
HV control computer harness is open or short-circuited
Poor electrical connection of the HV control computer circuit

What Does It Mean?

How to Fix P0A1D Code

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

When Is P0A1D Code Detected?

The Power Management Control ECU (HV CPU) monitors its internal operation, sets DTCs, and performs safety control when it detects the following malfunctions. If any of the following DTCs are issued, replace the Power Management Control ECU (HV CPU).

P0A1D Possible Symptoms

Engine light on (or service engine soon warning light)

P0A1D Meaning

The HV control ECU performs diagnostic monitoring to check the proper operation of internal and external ECU systems. In this diagnostic monitor, the HV control ECU checks the REF signal from the main engine ECU

for errors.

If the HV control ECU detects an error in the REF signal, it will conclude that there is a malfunction in the main engine CPU, the REF signal, or the HV control ECU. The HV control ECU turns on the MIL and sets a diagnostic code (DTC).

Starter/Generator Control Module P0A1E

P0A1E Possible Causes

Faulty starter/generator control module
Starter/generator control module harness is open or shorted
Poor electrical connection in starter/generator control module circuit

What Does It Mean?

How to Fix Code P0A1E

P0A1E Possible Symptoms

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

P0A1E Meaning

The Engine Control Module (ECM) monitors the starter/generator control module. The ECM sets the OBDII code when the starter/generator control module does not meet factory specifications.