P0A80 Replace Hybrid Battery Pack

Article by
Stephen Darby
Stephen Darby
ASE Certified Technician

Replace Hybrid Battery Pack

What does that mean?

This generic powertrain diagnostic trouble code (DTC) typically applies to many OBD-II hybrid electric vehicles. That may include but is not limited to vehicles from Toyota (Prius, Camry), Lexus, Fisker, Ford, Hyundai, GM, etc.

When a code P0A80 is stored, it means that the powertrain control module has detected a malfunction in the hybrid vehicle battery management system (HVBMS). This code indicates that a weak cell failure has occurred in the hybrid battery pack.

Hybrid vehicles (which do not require external charging) utilize nickel metal-hydride battery packs. Battery packs are actually blocks of batteries (modules) that are wired together using sections of busbar connectors or cables. The typical HV battery is composed of eight (1.2-volt) cells in series. Twenty-eight modules make up the typical HV battery pack.

The HVBMS regulates the charging level of the battery pack and monitors its state. Individual cell resistance, battery voltage, and battery temperature are all factors that are considered by the HVBMS and PCM when determining battery pack condition and the desired charging level.

Multiple ammeter sensors and temperature sensors are placed at strategic points throughout the HV battery pack. In most cases, each cell is equipped with a ammeter/temperature sensor. These sensors provide the HVBMS with data from each cell. The HVBMS compares individual voltage signals to determine if inconsistencies are present and reacts accordingly. The HVBMS also provides the PCM with data, via the controller area network (CAN), regarding battery charge level and battery pack condition.

When the HVBMS provides the PCM with an input signal which reflects inconsistent battery or cell temperature and/or voltage (resistance), a code P0A80 will be stored and a malfunction indicator lamp may be illuminated.

Toyota Prius Hybrid Battery Pack

Example location of a hybrid battery pack, in a Toyota Prius:

What is the severity of this DTC?

A code P0A80 indicates a serious malfunction in a major component of the hybrid powered vehicle. It should be addressed as an urgent matter.

What are some of the symptoms of the code?

Symptoms of a P0A80 trouble code may include:

What are some of the common causes of the code?

Causes for this code may include:

What are some P0A80 troubleshooting steps?

NOTE: The high voltage battery pack should only be serviced by qualified personnel.

If the HV in question has more than 100,000-miles on the odometer, suspect HV battery pack failure.

If the vehicle has less than 100K miles, a loose or corroded connection is probably the source of your malfunction. HV battery pack repair or remanufacture is a possibility but either of these options may prove unreliable. The safest method to rectify a defective HV battery pack is replacement with a factory part. If this is cost prohibitive for the situation, consider a used HV battery pack.

A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of HV battery diagnostic information will be needed to diagnose a code P0A80. Use the scanner to observe HV battery charging data after obtaining testing procedures and specifications from the HV information source. Component location diagrams, wiring diagrams, connector face views, and connector pin out charts will be instrumental in reaching an accurate diagnosis.

Visually inspect the HV battery pack and all circuitry for signs of corrosion or open circuits. Remove corrosion and repair defective components as required.

After retrieving all stored codes and pertinent freeze frame data (connect the scanner to the vehicle diagnostic port), clear the codes and test drive the vehicle to see if the P0A80 is reset. Test drive the vehicle until the PCM either enters readiness mode or the code is reset. If the code is reset, use the scanner to identify the HV battery cells which are experiencing inconsistencies. Make a note of the cells and continue with your diagnosis.

Using freeze frame data (from the scanner), determine whether the condition which caused the P0A80 to be stored involved an open circuit, high cell/circuit resistance, or an HV battery pack temperature discrepancy. Test appropriate HVBMS sensors (temperature and voltage) by following manufacturer testing specifications and procedures. Replace sensors which do not comply with manufacturer’s specs.

You may test individual cells for resistance using the DVOM. If the individual cells exhibit an acceptable degree of resistance, use the DVOM to test resistance in busbar connectors and cables. Individual cells and batteries may be replaced but total HV battery pack replacement may prove to be the most reliable fix.

Need more help with a P0A80 code?

If you still need help regarding the P0A80 trouble code, please post your question in our FREE car repair forums.

NOTE: This information is presented for information purposes only. It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. All information on this site is copyright protected.

Prius Error Code P0a80

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When a code P0A80 is stored, it means that the powertrain control module has

detected a malfunction in the hybrid vehicle battery management system (HVBMS). This code indicates that a weak cell failure has occurred in the hybrid battery pack. Hybrid vehicles (which do not require external charging) utilize nickel metal-hydride battery packs.

P0A80, P3015, P3016. Don’t skip this important part of diagnosis, shown on

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get this code … P0420 Catalyst System Efficiency Below Threshold. A P0420 trouble code is our next one here. If … P1121 Coolant Flow Control Valve Position Sensor Stuck. Another contributor to our check engine … P0A80/P3000 Replace Hybrid Battery Code. A P0A80 can occur for many reasons, but what the … C1256 Failed Brake Actuator Code. If you get a long buzzer and a master warning light, chances … See full list on torquenews. com

Toyota Prius: I am getting two codes; P0A80 and P0420

rified Toyota Mechanic We use cookies to give you the best possible experience on our website. By continuing to use this site you consent to the use of cookies on your device as described …

Second generation Prius are going the way of their predecessors: getting old

er. And with age comes hybrid battery failure. When an HV battery officially “dies” (sets trouble code P0A80) depends on both age and mileage (i. e. use), but its predictability depends on other factors still: frequency of driving, length of trips, and temperature.

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Feb 06, 2021 · I have recently got a P0A80 code to replace the HV Battery

and a «check hybrid system» on the dash. I can make a post about how I did it later if people are interested, but I was able to test the entire pack cell by cell and found about 12 cells that only had a capacity of 1000mAH to 2000mAH and the rest are all above 4000mAH.

What is the cost to diagnose the P0A80 TOYOTA code Labor: 1.0 The cost to di

agnose the P0A80 TOYOTA code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most …

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When problem this code (P3000 and P0a80 ) the car hase check engine warning

light.-Check the HV system-Check HV battery-Check the the block data list of HV B.

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Aug 15, 2020 · TOYOTA PRIUS C1259 AND P0A0D ERROR. The HVBMS also sends t

he PCM with data, via the controller area network (CAN). When it provides the PCM with an input signal which reflects inconsistent battery or cell temperature and/or voltage (resistance) then consider P0a80 Prius code generation and a malfunction indicator may be illuminated.

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Dec 24, 2014 · I replaced Hybrid battery, but still getting alarms. using

code reader I still read between resets: Which may not occur for days or just minutes. P0A80 MIL OFF MONITORS 0 INC 6 READY MISFIRE FUEL COMP CATLYST EVAP 02 SESR

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Code P0A80. I have 2005 Prius with 300k miles. I started throwing P0A80 code. I removed the battery and checked all the modules and found 2 of low voltage, ordered them from Ebay and replaced them. I placed the battery back in the car and started the car but got P0A80 code again.

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What is the cost to diagnose the P0A80 2010 TOYOTA PRIUS code Labor: 1.0 The

Aug 09, 2019 · When you presented with the original issue, and the diagno

stic code of P0A80, is it reasonable for ANY mechanic to conclude that the issue is the battery? I’m not a mechanic, but if the code suggesting a failing battery is reported on a 13 year old car with close to 100,000 miles, it seems reasonable that it is a battery issue. Hindsight is 20/20.

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Jul 27, 2020 · These codes have come up on my 2004 Prius Gen 1 with 97,53

0 miles. If I replace the Coolant Flow Control Valve will my car pass a smog test? The guy at AutoZone told me that the P1150 kept a car from passing smog. Also are all these codes related in some way? I lost my husband and want to have a clue about repairs when I take it to a mechanic.

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g Codes mean? Hybrid Battery 911 provides details on POA80, P3000, P3011-P3024 & C1241 codes.

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Weak Cell Fault (P0A80) This fault is triggered based on thresholds programm

Feb 19, 2014 · I have an 05 Prius, 92K miles, 8yrs + 3 mos owned, so just

Trouble code P0A80 This is the one all Prius owners fear. However, I ordered

a couple battery modules from Ebay and did the repair myself. That was 24 days ago and it is still running smooth.

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Aug 06, 2012 · Generic code readers (mentioned above) will read the indus

Hybrid Battery Restore (not rebuild) or recharge is cheaper!

2010 or newer Prius, 2008 and newer most other Toyota hybrids. We can restor

P0Axx Hybrid Diagnostic Trouble Codes

P0Axx Hybrid Trouble Codes. This is the listing of P0A00-P0AFF OBD-II diagno

stic trouble codes (DTCs). They all start with P0A, the first letter P designates they are powertrain related codes, the next two characters 0A indicates they are generic hybrid related codes.

Prius (2004-09) :: Scanner Found Code U0293

Jul 13, 2016 · Prius (2004-09) :: Warning Triangle Came On And Scanner Sh

ow P0A80 Code My Prius has started throwing the code P0A80, it all happened after I went away for work and left the car in storage for 15 days, during that time I left the OBD scanner plugged in and it drained the 12v battery, a quick jump start and it was back up and running.

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Mar 24, 2020 · 06 Toyota Prius code P0A80 Post by Hardy » Tue Mar 24, 20

20 8:19 pm The engine light went on after I loaded two 50 pound bags of salt in the trunk on the right side.

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Oct 25, 2019 · The way that Toyota Prius ensures that it is staying econo

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What does p0a80 mean on a Toyota Prius?

Typically, the codes that come up after a diagnostic are P0A80 and P3000. The P300 code refers to the Prius’ battery control system. When this code appears, the problem is typically caused by several sources, but it means there is an issue with the HV battery’s ECU.

What is the Toyota Prius inverter code?

A very common code your Toyota Prius is a P0A80 code. It has to do with the hybrid system as well, just not the inverter. If you encounter this code, check out 3 Solid Replacement Options for your HV battery. On Prius, whenever the car is on the pump is running and circulating the coolant from the inverter to the radiator.

Why does my Prius have a P300 code?

The P300 code refers to the Prius’ battery control system. When this code appears, the problem is typically caused by several sources, but it means there is an issue with the HV battery’s ECU. Signs that your Prius is experiencing this common problem are:

What causes a p0a80 code on a HV battery?

Causes for this code may include: Defective HV battery, cell, or battery pack Individual cell resistance is excessive Discrepancies in cell voltage or temperature Loose, broken, or corroded busbar connectors or cables What are some P0A80 troubleshooting steps?

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