Error code Hybrid System

awfuhrmann · Mar 31, 2023

Hello! I just bought a 2006 Hybrid Highlander with 185,000 miles in it. Loving it so far, except that 5 days ago a Check Engine came on for the Hybrid System came on, but it went off by itself the next day...but today is back on again... so I took it to get scanned and it gives a P0A1B code error, that is current and also appears as an historic one...

Does anyone have any insights on P0A1B for the Hybrid System? Please tell me is just a sensor 😟
Thanks

Super Stock · Mar 31, 2023

You can look up error codes with a simple search. Unfortunately, aside from checking the wiring connections, this is a dealer service item. Drive motor control module.

awfuhrmann · Mar 31, 2023

Thanks! I did try to search it online, but couldn't find anything yet...

whosurpopi · Feb 28, 2024

Did you ever get a fix? Mine just started this yesterday.

cj1 · Feb 28, 2024

Common Problems That Trigger the P0A1B Code

Inverter/converter assembly failure

Need to locate hybrid shop or Toyota dealer for diagnosis.
Let us no what you find out.

whosurpopi · Mar 4, 2024

I actually fixed it myself. Between raising the level of the battery coolant, and cleaning the cables and terminals for the 12v battery, the code has not returned.

Error code Hybrid System

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