Fuel System
Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.
What Owners Say
"Small leak"
Anonymous, FL (2000 Toyota Avalon XL 3.0-L V6)"check engine light came on and when I took it to dealer, had to replace vacuum switching valve in emission control system."
Anonymous, NC (2000 Toyota Avalon XL 3.0-L V6)"Failed State of IL air pollution test. Needed to update and repair to improve emission rating"
Anonymous, IL (2000 Toyota Avalon XLS 3.0-L V6)"warning light"
Anonymous, NC (2000 Toyota Avalon XLS 3.0-L V6)"Check engine light always on due to emissions issues"
Steve E., PA (2000 Toyota Avalon XL 3.0-L V6)"vapor canister intermittent"
Anonymous, MO (2000 Toyota Avalon XL 3.0-L V6)"had to replace both knock sensors. Also had one oil control valve for the variable valve timing replaced. Both problems caused the engine to run erratically and fail emissions testing"
Anonymous, MO (2000 Toyota Avalon XLS 3.0-L V6)"N.C. YEARLY INSPECTION - DID NOT PASS- WAS HAVING PROBLEMS WITH A "COLD START-UP. AFTER $900.00 REPAIR BILL. IT PASSED INSPECTION BUT THE COLD START HAS RETURNED ON OCCASION"
Lynn B., GA (2000 Toyota Avalon XL 3.0-L V6)"3rd catalytic converter I have had to replace. Now I have replaced all three of them, not a cheap process!"
John N., WA (2000 Toyota Avalon XLS 3.0-L V6)"For three times in last few years, when my engine check light came on, it was always a problem with the catalytic converter."
Daniel U., FL (2000 Toyota Avalon 3.0-L V6)"rEPLACED"
Anonymous, FL (2000 Toyota Avalon XL 3.0-L V6)"had to replace, leaking"
Anonymous, NC (2000 Toyota Avalon XLS 3.0-L V6)"Engine light comes on despite repairs to exhaust system and seems to be triggered by failure to tighten the fuel cap, which has been replaced a couple of times."
D M., MD (2000 Toyota Avalon XLS 3.0-L V6)"Fuel gauge registered incorrectly"
Anonymous, CA (2000 Toyota Avalon XLS 3.0-L V6)"Automatic choke didn't work sometimes on startup"
Anonymous, CA (2000 Toyota Avalon XL 3.0-L V6)"Intermittent acceleration and continuity. Pump replaced."
Anonymous, WI (2000 Toyota Avalon XL 3.0-L V6)"Old age ... pump wore out, also fixed throttle body gasket"
Anonymous, TX (2000 Toyota Avalon XLS 3.0-L V6)"Exhaust manifold O2 failed on a very cold morning"
Anonymous, WI (2000 Toyota Avalon XLS 3.0-L V6)"Engine thermostat sensor needed to be replaced. First time since purchased"
Michael W., TX (2000 Toyota Avalon XLS 3.0-L V6)"O2 sensor in exhaust system created a warning light indication. Cost to repair would be around $400 with no change in gas mileage or car performance. Elected not to repair"
Steve S., FL (2000 Toyota Avalon XLS 3.0-L V6)"after converter sensor defective"
Anonymous, ON (2000 Toyota Avalon XL 3.0-L V6)"Check engine light several times because of sensor"
Anonymous, ID (2000 Toyota Avalon XLS 3.0-L V6)"Dash light came on. I bought 12 oz. of gas additive and within 10 minutes it was cured."
Anonymous, UT (2000 Toyota Avalon XLS 3.0-L V6)"Check engine light stays on, not sure why but has to do with emissions, gas cap, etc. throughout life of car. Spent thousands in years past, does not stay fixed. Will not spend more because of age of car. Still runs ok, keeping it local."
Anonymous, (2000 Toyota Avalon XLS 3.0-L V6)"3 SENSORS WERE REPLACED"
Anonymous, FL (2000 Toyota Avalon XL 3.0-L V6)"both were replaced to correct fuel flow"
Anonymous, GA (2000 Toyota Avalon XL 3.0-L V6)"Operator error. High speed driving for 30 miles in 2nd gear caused the check engine light"
Anonymous, CA (2000 Toyota Avalon XLS 3.0-L V6)"false catalytic converter problem light when driving over rough road or bumps"
Anonymous, CO (2000 Toyota Avalon XLS 3.0-L V6)"Check engine light had been on and off intermittently for six months, ultimately diagnosed as failed O2 sensor which was replaced last week"
Nancy W., MA (2000 Toyota Avalon XLS 3.0-L V6)"The idle air control valve became intermittently defective and was eventually replaced"
Jeffrey F., MD (2000 Toyota Avalon XLS 3.0-L V6)"Check Engine light P00173"
Robert H., CO (2000 Toyota Avalon XLS 3.0-L V6)"Sensor caused check engine light to come on"
Gary F., MN (2000 Toyota Avalon XL 3.0-L V6)"intermittent check engine light, unknown cause, last time it was a sensor, a few years ago"
Tom N., CT (2000 Toyota Avalon XL 3.0-L V6)"Burned out"
Anonymous, TX (2000 Toyota Avalon XLS 3.0-L V6)"I have replaced two oxygen sensors and a mass air flow meter"
Phillip N., CA (2000 Toyota Avalon XLS 3.0-L V6)"check engine light came on. Had to replace air/fuel ratio sensor"
Anonymous, FL (2000 Toyota Avalon XL 3.0-L V6)"SAME PROBLEM WITH N.C. INSPECTION. AFTER WORK IT HAS NO PROBLEMS"
Lynn B., GA (2000 Toyota Avalon XL 3.0-L V6)"I had two sensors go out that had to do with the electronic timing system. Car sounded like it could barely run"
Anonymous, OR (2000 Toyota Avalon XLS 3.0-L V6)"Bad sensors caused erratic performance."
Robert B., SC (2000 Toyota Avalon XLS 3.0-L V6)"Sensors failed."
Anonymous, IL (2000 Toyota Avalon XLS 3.0-L V6)
"The Avalon has three catalytic converters. Two of them went bad at approximately the same time costing us $1000 apiece"
Terry D., CA (2000 Toyota Avalon XLS 3.0-L V6)