If a brake fluid, internal, or other leak is detected due to improper actuator sealing, this information is saved in the diagnostic trouble code. Abnormal leak of acc press discussion in ' gen 3 prius care, maintenance & troubleshooting ' started by ninthtale, sep 16, 2021. Repair information for c1391 toyota code Learn what abnormal leak of accumulator pressure means, location and how to repair. When the code c1391 abnormal leak of acc press appears, it means the accumulator cannot hold pressure properly Instead of maintaining steady pressure, it leaks internally, causing frequent pump activation, warning lights, and longer stopping distances.
Code c1391 description the diagnostic code c1391 indicates an abnormal leak of accumulator pressure in the vehicle's braking system The accumulator is a component that stores hydraulic pressure to assist with brake actuation. Internal leakage is suspected if the pump motor operates frequently without braking. The c1391 error code is a common issue in toyota prius models across different generations, as well as other toyota and lexus hybrids This code indicates an abnormal leak in the brake actuator, which can lead to braking performance issues and safety concerns.
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