2008 Toyota Highlander Hybrid electronic stability control (esc) problems

“DRIVING DOWN THE ROAD WHEN THE TRACTION SENSOR CAME ON. FOLLOWED BY A WARNING OF CHECK HYBRID SYSTEM AND VCS SYSTEM. AND CAR SHUT COMPLETELY OFF IN THE MIDDLE OF TRAFFIC.”

“RECENTLY WE'VE GOT A BUNCH OF WARNING LIGHTS ON THE DASHBOARD OF OUR CAR INDICATING A BRAKE SYSTEM MALFUNCTION AND URGING US TO STOP THE VEHICLE IN A SAFE LOCATION. THE BRAKES WERE STILL WORKING AND WE WERE ABLE TO CAREFULLY AND SAFELY DRIVE HOME. AFTER SCANNING THE CAR FOR ABS ERROR CODES AND DOING A QUICK ONLINE SEARCH, I REALIZED THAT THE BRAKE BOOSTER PUMP ASSEMBLY AND ACTUATOR ASSEMBLY FAILED IN OUR CAR.”

“BRAKE ACTUATOR ASSEMBLY AND BRAKE BOOSTER PUMP ASSEMBLY (PROBLEM KNOWN TO TOYOTA FOR THIS AND OTHER MODELS,) FAILED, LEADING TO DASH MESSAGES: MASTER WARNING, ABS WARNING, BRAKE SYSTEM WARNING (BRAKE MALFUNCTION: STOP THE VEHICLE IN A SAFE PLACE IMMEDIATELY AND CONTACT A DEALER), SLIP INDICATOR. BRAKE PEDAL FUNCTION SEEMS LIMITED, AND DANGEROUS. ALL WARNINGS COME BACK UPON SHUTTING OFF AND RESTARTING VEHICLE.”

“I SENT A LETTER TO TOYOTA MOTOR SALES USA AFTER BEING REFUSED SERVICE AT A LOCAL DEALER TO RESOLVE A SAFETY ISSUE, WITH NO REPLY. WHILE PRESSING BRAKE WHEN STARTING I GOT A COUPLE OF ERROR MESSAGES THAT SAID TO CONTACT A TOYOTA DEALER. I DID SOME VERY DETAILED RESEARCH INTO THIS PROBLEM AND WHAT OTHERS HAD ENCOUNTERED. I FOUND THE ERRORS WOULD ONLY SHOW WHEN THE 12 VOLT BATTERY WAS GETTING LOW ON CHARGE. THE BRAKE BOOSTER PUMP IS ONE OF THE SUSPECT ITEMS DRAINING THE BATTERY BECAUSE IT CONTINUES TO RUN LONG AFTER THE VEHICLE IS PARKED. SINCE I DON'T HAVE THE TOOLS TO CHECK THE CURRENT DRAW ON THIS OR IF IT IS EVEN SUPPOSED TO RUN LONG AFTER THE VEHICLE IS SHUT OFF, I WANTED MY TOYOTA DEALER TO CHECK THIS. THERE IS A " CUSTOMER SUPPORT PROGRAM NOTIFICATION - ZKC" RELATED TO THIS FOR THE BRAKE ACTUATOR ASSEMBLY AND BRAKE BOOSTER PUMP ASSEMBLY. I SPECIFICALLY REQUESTED THAT THEY CHECK OUT THE ELECTRICAL COMPONENT OF THE BRAKE BOOSTER PUMP EVEN IF NOT COVERED BY WARRANTY. I ALSO TOLD THEM ABOUT THE ERRORS ONLY OCCURRING ON A LOW 12 VOLT BATTERY CHARGE. THEIR DIAGNOSIS SHOWED AN ERROR CODE OF POAA6 AND ONLY THE WARNING LIGHTS AND ERROR MESSAGE IN THE CAR DISPLAY.…”

“AT TOYOTA, WE ARE DEDICATED TO PROVIDING VEHICLES OF OUTSTANDING QUALITY AND VALUE. AS PART OF OUR CONTINUAL EFFORTS TO ENSURE CUSTOMER SATISFACTION, TOYOTA WOULD LIKE TO ADVISE YOU OF A VOLUNTARY CUSTOMER SUPPORT PROGRAM THAT HAS BEEN INITIATED FOR YOUR VEHICLE. TOYOTA HAS RECEIVED REPORTS REGARDING CERTAIN INTERNAL MALFUNCTIONS OF THE BRAKE ACTUATOR ASSEMBLY IN CERTAIN 2008-2010 MODEL YEAR HIGHLANDER HYBRID VEHICLES. IN THESE REPORTS, CUSTOMERS HAVE NOTED VARIOUS BRAKE SYSTEM RELATED WARNING LAMPS ARE ILLUMINATED. THIS CUSTOMER SUPPORT PROGRAM PROVIDES COVERAGE AS IT APPLIES TO THE BRAKE ACTUATOR ASSEMBLY AND BRAKE BOOSTER PUMP ASSEMBLY. THE SPECIFIC CONDITION COVERED BY THIS PROGRAM IS FOR CERTAIN INTERNAL MALFUNCTIONS OF THE BRAKE ACTUATOR ASSEMBLY. IF THE CONDITION IS VERIFIED, THE VEHICLE WILL BE REPAIRED WITH NEW BRAKE ACTUATOR ASSEMBLY AND BRAKE BOOSTER PUMP ASSEMBLY UNDER THE TERMS OF THIS CUSTOMER SUPPORT PROGRAM. IF THE FOLLOWING WARNING LAMPS ARE ILLUMINATED, THE VEHICLE MAY BE EXPERIENCING A CONCERN WITH THE BRAKE ACTUATOR ASSEMBLY AND BRAKE BOOSTER PUMP ASSEMBLY THAT IS COVERED BY THIS CUSTOMER SUPPORT PROGRAM. THE PART IS BACK ORDERED AND THEY…”

“ABS MODULE FAILURE, SAME US OTHER PEOPLE COMPLAINING. GOT DASH LIGHTS ON AND THE CAR LOST COMPLETE BRAKE POWER. ABS ACTUATOR NEEDS TO BE REPLACED. THE PRICE FOR THE PART IS UNBELIEVABLE HIGH AND SEEMS TO BE RECALLED ON EARLIER MODELS”