Toyota P1ac000 Info

A: Yes, if your car is under the 8-year / 100,000-mile hybrid battery warranty (or 10-year/150,000-mile in California emission states). Check your owner’s manual. The code itself is proof of a warranty-covered defect.

A static voltage test isn’t enough. Using a battery load tester or a set of 12V bulbs, apply a small load to each suspect module. A weak module will drop voltage instantly below 6.0V, confirming it’s the source of P1AC000. toyota p1ac000