Hybrid Powertrain Control Module
Table of contents
P0A1D TOYOTA Possible Causes
- Faulty HV Control ECU
- HV Control ECU harness is open or shorted
- HV Control ECU circuit poor electrical connection
How do I fix code P0A1D TOYOTA?
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’s pins.
Cost of diagnosing the P0A1D TOYOTA code
The cost of diagnosing the P0A1D TOYOTA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
The power management control ECU (HV CPU) monitors its internal operation, it will set DTCs and perform fail-safe control when it detects the following malfunctions. If any of the following DTCs are output, replace the power management control ECU (HV CPU).
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0A1D TOYOTA Description
The HV control ECU performs diagnostic monitoring to verify proper operation of internal and external ECU systems. In this diagnostics monitor, the HV control ECU checks the REF signal from the motor main 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 motor main CPU, the REF signal or the HV control ECU. The HV control ECU illuminates the MIL and sets a Diagnostic Trouble Code (DTC).