
Why Swapping a Single Hybrid Battery Module Will Cause a P0A80 Code Again
Replacing one failing module in your hybrid battery pack is like replacing a single blown tire when all four are bald — it only delays the inevitable.
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Replacing one failing module in your hybrid battery pack is like replacing a single blown tire when all four are bald — it only delays the inevitable.

Quick-lube shops are routinely overfilling Prius engines — causing stalling, hard starts, and codes P3190 and P0A0F. Here's how to fix it.

In 2025, a used Prius still offers better value than most new EVs or plug-in hybrids for budget-conscious buyers.

Facing the 'Triangle of Death'? Here's how to decide between a refurbished and new OEM hybrid battery for your Toyota or Lexus.

Hearing knocking, seeing white smoke, or finding milky oil? Here's how to diagnose whether your Prius engine needs repair or full replacement.

The Gen 3 Prius electric water pump can fail silently — ignoring it risks a warped head and blown gasket. Here's what to watch for.

Code P0A0D often has a surprisingly simple fix — the HV interlock orange service plug wasn't reinstalled correctly after a service.

Technically yes — but not for long, and definitely not by repeatedly clearing the warning light. Here's what's actually happening.

The Prius's low-tension piston rings are engineered for efficiency — but they wear out. Here's what causes oil consumption and how to manage it.

Most hybrid owners have played with the drive modes but don't fully understand what each one does. Here's a practical breakdown.

P0AA6 is an umbrella code with sub-codes that pinpoint very different root causes. A standard code reader won't get you far — here's what you need.

Five generations, two decades of production, and a minefield of things to check. Here's our complete used Prius buyer's checklist.

Track-style car washes force the Prius into neutral, which stops the hybrid battery charging and can drain it dangerously — especially with the A/C on.

Lower maintenance than a regular car, but not maintenance-free. Here's the complete schedule every Prius owner should follow.

From tire pressure to driving style to battery cooling fans, here's every lever you can pull to maximize your hybrid's fuel economy.

Catching hybrid battery failure early can save you from a dangerous situation on the road. Here are the five signs to watch for.

Knocking on cold start? White smoke? Milky oil? Gen 3 Prius and Lexus CT200h head gasket failure is a real problem — and the longer you wait, the more it costs.

The Prius eCVT is not designed to be flat-towed at highway speeds. Here's the right way to tow one — and how to handle emergency situations.

The 12V auxiliary battery in a Prius fails just like any car battery — and it causes a completely different set of symptoms than the main HV battery.

A black speedometer screen and a code B1271 are common in Gen 2 Prius. The fix is a capacitor — here's what to expect.

Code P1121 means the coolant flow valve needs replacement. It's not an emergency, but it needs to be addressed — especially before a state inspection.
What do those colorful bars actually mean? Why does the battery never stay full? Here's a complete Q&A on the Prius battery display.

P0A80 means the battery system detected a 20%+ voltage imbalance between blocks. Here's what it means, why it happens, and why a single-module fix fails.

Brake actuator failure is one of the 'Big 3' costly Prius repairs — and the most dangerous to ignore. It disables ABS and regen braking.

The inverter water pump is an affordable fix that, if ignored, can turn into a costly inverter replacement. Here's what to expect when yours fails.

From P0AA6 sub-codes to P0A08/P0A09 to overheating stalls — a guide to diagnosing Prius inverter failures by code, plus Toyota's warranty enhancement.