What causes hybrid battery fault codes and problems?New prius hybrid batteries in Hamilton NZ

In hybrid vehicles, a high voltage battery is a key part of the vehicle’s operation. This battery charges via regenerative braking, allowing for a significant decrease in fuel consumption. In most hybrid cars, the battery sits under the car’s seats. Hybrid batteries are heavy and consist of many cells. Gradually, these cells will lose their ability to power your vehicle correctly. When this happens, the cells or battery will need to be replaced.

Sometimes, a hybrid battery can be reconditioned rather than replaced. Certain cells wear out more quickly than others. A recondition consists of removing and replacing these cells, thus improving the condition of the hybrid battery. We currently only recommend reconditioning batteries that are less than 12 years old.

Causes of common hybrid fault codes:

Fault Code Description Causes
P0A80 Replace Hybrid Battery Pack Hybrid battery cell failure
Battery cooling fans not working
Damaged battery connections or cables
P0A7F Hybrid Battery Pack Deterioration Hybrid battery cell failure
Battery level sensors not working correctly
Damaged alternator
P3000 Hybrid Battery Control System Problems with the hybrid battery’s ECU
Blown fuse
Hybrid battery malfunction
P3125 Converter & Inverter Assembly Malfunction Overheating inverter
Battery level sensor malfunctioning
Damaged wiring or circuitry


How long does a hybrid battery last?

The lifespan of your hybrid vehicle’s battery varies depending on the way your car is driven and maintained. For example, if you are an Uber or taxi driver travelling over 1,000 km per week, your battery may need replacement much sooner. In cases of regular use, the standard battery in Toyota hybrids such as the Prius should last for at least eight to ten years.

The best ways to extend the lifespan of your car’s battery include:

  • Routinely cleaning the auxiliary fan to prevent the battery from overheating.
  • Performing regular maintenance on your car and bringing it to a workshop yearly for a checkup.
  • Servicing the engine correctly – A poorly performing engine will put more stress on the hybrid battery, causing it to wear more quickly.


Signs that the hybrid battery needs reconditioning or replacement:

Toyota Hybrids

  • The check engine light will turn on
  • There may be another warning saying “Check Hybrid System”
  • A scan tool will return codes that say “Replace hybrid battery pack” or “Hybrid battery pack deterioration”

Honda Hybrids

  • The IMA warning light will appear on your dashboard
  • A battery warning light may appear, indicating that the smaller 12-volt battery is not being fully charged by your larger hybrid battery.
  • A scan tool may provide messages such as “Battery module individual voltage problem” or “Hybrid battery pack deterioration”.

Other symptoms:

  • Increased fuel consumption – If you notice that your car is using more petrol than it should, the high voltage battery may be the culprit.
  • Slower acceleration – A failing battery can affect the acceleration of your vehicle, making it more difficult to reach your desired speed.


Hybrid Battery Replacement & Reconditioning Service in Hamilton

At Grimmer Motors, we are experts when it comes to hybrid technology. With lots of experience in replacing and reconditioning hybrid battery packs, our team of mechanics can get your hybrid vehicle running normally again.

A hybrid battery replacement or recondition will allow for improved fuel economy and better engine performance. For hybrid battery replacement, cell replacement and other services in Hamilton, contact Grimmer Motors today!


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