Fault codes illuminates when car hits the rubbles hard, bumps or potholes

John Mechanic Kenya Posted   Latest   Edited  
Unsolved
High Voltage - Hybrid & Electric Vehicles
Electrification
2012 Lexus RX450h 3.5L (2GR-FXE)
P0A80 — Replace Hybrid/EV Battery Pack
Master Warning Light And Mil

Even though we are waiting for a new or replacement battery pack, customer's car keeps on illuminating the codes every time it hits the bumps or during driving in the rough roads. I have been clearing the codes temporarily but the repetition keeps on forcing me to redo the same thing over and over again. What is the permanent solution to this? Is there a loose sensor or should I check on the battery control unit? Thanks all

I have attached a diagnostic report.

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David Instructor
Indiana
David
 

I’m inclined to advise you to wait on the replacement battery pack but you could view T-SB-0074-20 first to see if the batt pack air flow / cooling fan is causing this common DTC. If air flow. cooling fan operation and the fan’s plastic squirrel cage all look clean / good, you’ll need to remember that the update rate of the data on the scan tool might not be fast enough to catch the full 0.3…

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Robert Technician
Michigan
Robert
   

Dave is a celebrity amongst us …curious if the P0A80 has - IFN or Suffix codes example POAA6-611. I don't know about loose with Ground fault detection needed

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John Mechanic
Kenya
John
 

Hello Robert, Pleasure to get advice from a celebrity

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John Mechanic
Kenya
John
 

Thanks David.

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Ahmad Engineer
Jordan
Ahmad
 

Check for air flow into the battery Make sure that all tga battery cover bolts are tightened And you can check for the sensors in each module And before thisput the selector on (N) with A/C and headlights on until the SOC reaches 25% to check if it's weak or there is something wrong in its components The difference in blocks voltage shouldn't drop under 19 with no more difference than 0.3V

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John Mechanic
Kenya
John
 

Thanks Al Saqri

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Robert Technician
Michigan
Robert
 

Piggy backing Ahmad's post POA80 set when a block voltage variance out of spec …Might even be a weak block code P3011 hidden Block 1 on up P3024 Block 14 . Bad module ,block or failing bus bar replaced so all with in 0.3 of each other …The other Prius along with these 2 is POA7F the battery is belly up

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Paul Owner/Technician
California
Paul
 

Hi John, It's a little hard to read the block voltages on your screen, and from what I can see the voltages aren't really proportional with the bar graphs, but here's what I notice. First, your “delta state of charge” is 44%. This should be at 0%. Delta SOC% is the difference between the calculated state of charge on the lowest block and the calculated state of charge on the highest block…

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Ahmad Engineer
Jordan
Ahmad
 

It's a battery replacement for sure

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John Mechanic
Kenya
John
 

Thanks Ahmad. Should I replace The whole battery pack, the defective cell or the block?

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Ahmad Engineer
Jordan
Ahmad
 

Hi john If you replace the defective cell or the block with a new one It will be high voltage and capacity than the others so the hybrid control unit will read the difference and command a new “replace" code due to high range difference in voltage So I will recommend to change the whole battery pack If you're going to replace with a used cell or block, it might work if you balance the…

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John Mechanic
Kenya
John
 

Thanks Ahmad

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John Mechanic
Kenya
John
 

Hello Paul, thanks for the advice. Do you think buying a block would help with this since maybe it's only a single cell causing the trouble? Should I replace the cell, block or the whole battery pack? Customer waiting for my advice.

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Paul Owner/Technician
California
Paul
 

Short answer? Don't try to replace one block. Longer answer? See below. All of the blocks must be close to equal in state of charge and capacity. Adjusting state of charge is possible by disconnecting the bus bar so that the battery is no longer wired in series and charging (or cycling) each block independently. The problem is with getting blocks with equal capacity. All batteries decrease in…

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John Mechanic
Kenya
John
 

Thanks alot.

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