C1391 — Prius ABS Fault Abnormal Leak in Accumulator

Toyota Prius 2010 vehicles had a factory defect that caused leakage of nitrogen from the pressure system effecting the braking of the vehicle. We upgrade the ABS units with a 2013 model in case the following errors are seen. Please note that ABS unit needs to be calibrated very precisely. We also recommend to replenish the brake fluid on time to keep the ABS unit healthy.