2002 Toyota Sienna Electrical System Problems

Dear Sir, On April 2026, I need to do the semiannual smog check. Right now, I face DTC P0420 error code and I can't pass the smog check inspection. Note that I don't have the engine light on indicating the a/m error code. Only my OBD2 shows the error DTC Code P0420. I did some searhing and noticed that the ECM for Sienna should be updated to erase the a/m DTC code. I would appreciated to help me how the resolve this issue ASAP. It will enable me to renew my registration.You may contact on my cell phone 747 217 7254 or my email at massey.miri@gmail.com. Regards, Massey

CHECKING ENGINE LIGHT ON AND OFF SLIDE DOOR NOT WORKING PROPERLY

ALL THE LOCKS KEEP UNLOCKING, AND LOCKING WITHOUT ANYONE IN OR AROUND THE VEHICLE, BECAUSE LOCKS ARE LOCKING AND UNLOCKING IT IS CAUSING THE BATTERY TO DRAIN. THE DOORS LOCK AND UNLOCK WHILE VAN IS IN GEAR, WHILE DRIVING, AND WHEN VAN IS NOT RUNNING WITHOUT KEY IN IGNITION. I HAVE 2 CHILDREN AND BELIEVE THIS IS A SAFETY ISSUE! *TR

WHEN I ATTEMPTED TO OPEN DRIVER SIDE SLIDING DOOR IT WOULD NOT OPEN ELECTRICALLY OR MANUALLY. AFTER SEVERAL FAILED ATTEMPTS TO OPEN I CUT THE CABLE AND WAS ABLE TO THEN OPEN THE DOOR. AT THIS POINT IN TIME BOTH SLIDING DOORS WILL NOT OPEN ELECTRONICALLY BUT WILL OPEN MANUALLY. *TR

POWER SLIDING DOOR DOESN'T CLOSE. *TR

ELECTRONIC AUTOMATIC SLIDING DOOR FAILURES. JULY 2011, PASSENGER SIDE (SLIDING DOOR) ELECTRONIC OUTER DOOR HANDLE STOPPED WORKING. THE ONLY WAY TO ENTER OR EXIT THE VEHICLE IS BY PUSHING THE BUTTON ON THE DOOR JAM OR OVERHEAD CONSOLE. THEN THE DOOR STOPPED OPENING COMPLETELY. THE MOTOR TRIES TO OPEN THE DOOR BUT SEEMS LIKE THE DOOR DOES NOT RELEASE. IT WILL NOT OPEN. APRIL 2012, DRIVERS SIDE (SLIDING DOOR) ELECTRONIC OUTER DOOR HANDLE HAS STOPPED WORKING. THE ONLY WAY TO ENTER OR EXIT THE VEHICLE IS BY PUSHING THE BUTTON ON THE DOOR JAM OR OVERHEAD CONSOLE. THE DOOR OPENS 80% OF THE TIME. WHEN IT DOES NOT WORK THE MOTOR TRIES TO OPEN THE DOOR BUT SEEMS LIKE THE DOOR DOES NOT RELEASE. WHEN THE DRIVERS SIDE PASSENGER DOOR DOES NOT OPEN THE FAMILY HAS TO ENTER OR EXIT THROUGH ONE OF THE FRONT DOORS AND CLIMB THROUGH TO THE BACK SEATS. THERE IS NO INTERNAL MANUAL OVERRIDE OF THESE DOORS. THIS IS NOT SAFE. IN AN EMERGENCY MY FAMILY WILL HAVE TO GO THROUGH THE FRONT DOORS OR BREAK AND GO THROUGH THE WINDOWS. THIS IS A SAFETY HAZARD. THE OUTSIDE DOOR HANDLES AND SLIDING DOOR MECHANISMS SHOULD BE REPAIRED AT NO CHARGE BY TOYOTA. *JS

SLIDING DOORS ON BOTH SIDES HAVE STOPPED WORKING ELECTRONICALLY. THE DOORS MUST BE FORCED MANUALLY AND THIS IS VERY DIFFICULT. TOYOTA WILL NOT ADDRESS THIS ISSUE. *KB

1. TRUNK DOOR LATCH BROKEN AND CANNOT OPEN. TOYOTA DOES NOT PROVIDE A MANUAL TRUNK RELEASE INSIDE THE VAN. 2. PASSENGER SIDE AUTOMATIC SLIDING DOOR WOULD NOT STAY CLOSED. IT JUST KEPT POPPING OPEN. *TR

AUTOMATIC SLIDING DOOR SOMETIMES WILL NOT SHUT AND REQUIRES MULTIPLE, REPEATED PUSHING OF THE DRIVER'S SLIDING DOOR BUTTON UNTIL THE DOOR SHUTS. OFTEN TIMES, I WILL HAVE TO TURN OFF THE ENGINE AND CRANK THE ENGINE AGAIN AND THEN KEEP PUSHING THE DRIVER'S SLIDING DOOR BUTTON UNTIL (IF I AM LUCKY), THE AUTOMATIC SLIDING DOOR CLOSES. THIS PROCESS CAN TAKE 10 MINUTES OR LONGER DEPENDING ON HOW MUCH TIME I HAVE WHEN THIS PROBLEM OCCURS. SOMETIMES, I WILL TURN OFF THE ENGINE AND LEAVE THE DOOR OPEN FOR AN HOUR OR SO BEFORE CRANKING THE CAR AGAIN AND PUSHING THE BUTTON TO TRY TO CLOSE THE AUTOMATIC SLIDING DOOR. *TT

SLIDING DOORS ON 2002 TOYOTA SIENNA FAIL TO OPEN. 7-17-06: 73,316 MILES, BOTH SLIDING DOORS WILL NOT OPEN DUE TO PRODUCT DEFECT, REPAIR AT DEALERSHIP. 9-22-06: 76,829 MILES, SLIDING DOOR WILL OPEN BUT NOT CLOSE, REPAIR AT DEALERSHIP. 11-16-07: 92,730 MILES, SLIDING DOORS NOT WORKING, REPAIR AT DEALERSHIP. 3-13-08: 97,991 MILES, PASSENGER SLIDING DOOR NOT WORKING, REPAIR AT DEALERSHIP. 8-10-2009: 113, 814, PASSENGER SLIDING DOOR WILL NOT OPEN. THIS VEHICLE HAS BEEN IN NO ACCIDENTS AND WELL MAINTAINED. THESE DOORS CONTINUALLY FAIL. *TR

AUTOMATIC SLIDING DOOR ON TOYOTA SIENNA OFTEN DOES NOT CLOSE. EVEN WHEN ENCOURAGED "MANUALLY" TO CLOSE, IT PULLS BACK SEVERAL TIMES. IF AUTO FEATURE IS TURNED OFF, IT WON'T PULL CLOSED AT ALL. SLIDING DOOR ON LEFT SIDE WON'T OPEN FROM INSIDE. OCCASIONALLY LOCKS ITSELF SO THAT IT CAN'T BE OPENED FROM OUTSIDE EITHER, EVEN IF ALL OTHER DOORS ARE UNLOCKED. *TR

EVER SINCE NOVMBER, 2008, MY 2002 TOYOTA SIENNA PASSENGER SIDE POWER DOOR, HAS INTERMITTENTLY FAILED TO OPEN EITHER BY ACTIVATING THE BUTTON ON THE INSIDE OF THE DOOR COLUMN, BY PULLING THE DOOR HANDLE OUTSIDE, OR THE INSTRUMENT PANEL DOOR BUTTON, OR WORSE, AFTER OPENING, WILL NOT CLOSE. THE DEALER HAD TO REINITIALIZE THE ECU IN NOVEMBER, 2008, AND HAVE HAD INTERMITTENT PROBLEMS SINCE. NOW, SINCE AT LEAST DECEMBER, 2012, THE SLIDING DOOR WILL NOT OPEN AT ALL BY ANY OF THE 3 METHODS AND CANNOT BE REINITIALIZED. ALSO, AT TIMES THE MANUAL DRIVERS SIDE PASSENGER DOOR, IN THE PAST ~ 1 1/2 YEARS WILL NOT OPEN EITHER FROM INSIDE DOOR BUTTON RELEASE OR OUTSIDE DOOR HANDLE AND PASSENGERS HAVE TO CLIMB OVER FROM THE FRONT SEATS TO ENTER OR CLIMB OVER THE FRONT SEAT & CONSOLE TO EXIT THE VEHICLE. I HAVE BEEN ADVISED BY MY LOCAL TOYOTA DEALER THAT I NEED TO "START WITH THE REPLACEMENT OF THE ECU," A PART COSTING $730.00 AND ABOUT $1000 WITH INSTILLATION. I HAVE READ OTHER HORROR STORIES THAT REPLACING THE ECU ISN'T NECESSARILY THE ANSWER AND MANY DON'T KNOW WHAT THE ANSWER IS. HAVE THERE BEEN ANY AUTO RECALLS ON THESE POWER DOOR MECHANISMS YET? I SEE A LARGE VOLUME OF THE EXACT SAME COMPLAINTS ON THE INTERNET FOR THESE SIENNA AS WELL AS WITHIN THE NHTSA DATABASE. IN THE EVENT OF AN EMERGENCY EVACUATION OF THE VEHICLES' PASSENGERS, AS IT STANDS, A CATASTROPHE IS WAITING TO HAPPEN. *TR

TL*THE CONTACT OWNS A 2002 TOYOTA SIENNA. WHILE DRIVING AT APPROXIMATELY 60 MPH ON A ROAD UNDERGOING CONSTRUCTION, THE TIRE PRESSURE INDICATOR LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT PULLED OVER AND TURNED OFF THE IGNITION. HE CHECKED ALL THE TIRES BUT COULD FIND NO PROBLEMS. A MONTH LATER, WHILE DRIVING ON THE SAME ROAD (NO CONSTRUCTION THIS TIME) AT APPROXIMATELY 60 MPH, THE TIRE PRESSURE INDICATOR LIGHT ILLUMINATED ON THE INSTRUMENT PANEL AGAIN. THE CONTACT INSPECTED THE TIRES AGAIN BUT FOUND NO CAUSE FOR THE LIGHT. THE VEHICLE HAD NOT BEEN INSPECTED AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS APPROXIMATELY 55,000. THE CURRENT MILEAGE WAS APPROXIMATELY 72,000.

IN 2003, ECU UNIT WAS REPLACED ON PASSENGER SIDE REAR POWER SLIDING DOOR AS DOOR WOULD INTERMITTENTLY NOT OPEN OR CLOSE. HAS CONTINUED WITH INTERMITTENT PROBLEM SINCE REPLACEMENT UNTIL IT FINALLY WOULD OPEN BY NOT CLOSE. GIVEN THE VERY HIGH VOLUME OF COMPLAINTS ABOUT THIS PROBLEM ON ALL YEARS OF THE TOYOTA SIENNA, I WOULD LIKE FOR THE ODI TO OPEN AN INVESTIGATION. ALL YOU HAVE TO DO IS GOOGLE "TOYOTA SIENNA POWER SLIDING DOOR PROBLEMS" AND YOU END UP WITH MULTIPLE THOUSANDS OF HITS, WITH MOST BEING CHAT SITES WITH MULTIPLE COMPLAINT THREADS. *TR

2002 TOYOTA SIENNA VAN. THE VEHICLE COMPUTER WILL SPORADICALLY TRIGGER THE CHECK ENGINE LIGHT TO COME ON BASED ON NO ACTUAL CAUSE. THIS OCCURS AROUND EVERY 5,000 MILES. IT IS TYPICAL FOR THIS COMPUTER FAILURE TO BEGIN AFTER 75,000 MILES ON THIS YEAR OF SIENNA AND TOYOTA'S RECALL ONLY COVERS VEHICLES UP TO 75,000 MILES. THE COMPUTER COSTS $1,000 TO REPLACE. THIS RECALL SHOULD BE EXPANDED TO VEHICLES 10YRS OLD OR LESS. THERE IS PROBABLY AN INTERNAL MEMO FLOATING AROUND TOYOTA WITH A DOLLAR FIGURE ATTACHED BRANZELY BOASTING HOW MUCH THEY SAVED BY "SMOKING" A SHORTER RECALL PERIOD PAST THE US GOVERNMENT. TOYOTA CUSTOMER SERVICES HAS BEEN HOSTILE TOWARD RESOLVING THIS COMPLAINT. *TR

DT: THE CONTACT STATED THE FUSES KEPT BLOWING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT REPAIR SHOP FOR DIAGNOSTIC TESTING. THEY WERE UNABLE TO DUPLICATE THE PROBLEM. THEN, THE CONTACT TOOK THE VEHICLE TO A LOCAL DEALERSHIP TWICE BEFORE THEY WERE ABLE TO LOCATE THE PROBLEM. THE DEALERSHIP FOUND THE WIRING HARNESS IN THE DASHBOARD MELTED, CAUSING THE FUSES TO BLOW OUT. NO REPAIRS HAVE BEEN MADE. *AK

APPROXIMATELY A MONTH AGO THE CLOCK LOST THE TIME. 4/28/04 MILEAGE 42K DRIVING ON NH HIGHWAY RTE 3 SO. APPROACHING THE BEDFORD TOLL IN THE HIGHSPEED LANE (40-45 MILES PER HOUR) THROUGH A CONSTRUCTION ZONE WHEN THE VEHICLE LOST ALL POWER! ENOUGH SPEED LEFT TO PULL INTO THE LEFT BARRIER AND PUT THE VEHICLE IN PARK. THIRD ATTEMPT TO START THE VEHICLE AND THE POWER WAS REGAINED. AUTOFAIR TOYOTA DEALER SHIP INDICATED THAT TOYOTA HAD FORWARDED A CHAMPAIGN. TOYOTA CORPORATE CUSTOMER SERVICE INDICATED THAT THE CHAMPAIGN IS A SERVICE BULLETIN ONLY AND NOT TO BE CONFUSED WITH A RECALL. HOWEVER, NO WARNING LIGHT EVER CAME ON IN THE VEHICLE WHEN THIS HAPPENED. NOT CHECK BATTERY, CHECK ENGINE, NOTHING!

IN 2003, I WAS TOLD THE ECU UNIT NEEDED REPLACED ON PASSENGER SIDE REAR POWER SLIDING DOOR AS DOOR WOULD INTERMITTENTLY NOT OPEN OR CLOSE. HAS CONTINUED WITH INTERMITTENT PROBLEM UNTIL IT FINALLY WOULDN'T OPEN NOR CLOSE. GIVEN THE VERY HIGH VOLUME OF COMPLAINTS ABOUT THIS PROBLEM ON ALL YEARS OF THE TOYOTA SIENNA, I WOULD LIKE FOR THE ODI TO OPEN AN INVESTIGATION. ALL YOU HAVE TO DO IS GOOGLE "TOYOTA SIENNA POWER SLIDING DOOR PROBLEMS" AND YOU END UP WITH MULTIPLE THOUSANDS OF HITS, WITH MOST BEING CHAT SITES WITH MULTIPLE COMPLAINT THREADS. *TR

CONSUMER WAS TRAVELING ABOUT 40MPH ON HIGHWAY COMMING FROM DEALERSHIP WITH A BRAND NEW VEHICLE. SMOKE WAS COMMING FROM ENGINE DEPARTMENT. THEN, THE FIAMES STARTED COMING FROM HOOD. VEHICLE BURNED DOWN TO THE GROUND AND WAS TOTALED. THERE WERE NO INJURIES. DEALERSHIP WAS AWARE OF PROBLERM.*AK

NO SUMMARY LISTED FOR ABOV EVEHICLE. *AK