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
"Check engine light stays on, but system is working propery"
Anonymous, GA (2001 Toyota Avalon XL 3.0-L V6)"failed inspection due to codesp1150 and p 1354"
James F., NJ (2001 Toyota Avalon XLS 3.0-L V6)"EPA stinks because charcoal canister replacement is way to expensive to replace"
Anonymous, GA (2001 Toyota Avalon XL 3.0-L V6)"Several parts went bad which connect to the air filter"
R J., VA (2001 Toyota Avalon XL 3.0-L V6)"Now I get a code PO420 Catalytic Efficiency Below Threshold Bank."
Anonymous, (2001 Toyota Avalon XL 3.0-L V6)"fuel filler pipe vapor leak"
Anonymous, NY (2001 Toyota Avalon XL 3.0-L V6)"Rust and corrosion developed over time at the top of the fuel intake spout, causing bad seal and engine light. Each year for the last 8 -10 years, I had to bring car to dealer due to lit engine light. The solution always involved gas cap replacemen"
Anonymous, ON (2001 Toyota Avalon XLS 3.0-L V6)"The fuel cap was fitting incorrectly each time I put gasoline in my car. There was a problem with the fuel filler neck leading into the gas tank that caused the problem. This problem frequently caused the "check engine light" to activate"
Anonymous, GA (2001 Toyota Avalon XL 3.0-L V6)"It was not sealing properly"
R J., VA (2001 Toyota Avalon XL 3.0-L V6)"Replacement cap is non-standard as they no longer make the original. The screw has a different thread and on hot days swells so it is difficult to unscrew."
Anonymous, MD (2001 Toyota Avalon 3.0-L V6)"inaccurate reading of fuel"
E A., TX (2001 Toyota Avalon XLS 3.0-L V6)"Failed emission test required fuel injection system cleaning"
Anonymous, IL (2001 Toyota Avalon XL 3.0-L V6)"The fuel flattener leaked gasoline and the car responded unpredictability. The fuel flattener sk0thes the flow of gasoline and reduces pressure on the injectors - a debate exists on whether it is really needed. According to the dealer my case is a rare event, but the engine could have caught fire. The cost to install a new valve was very modest. My Highlander has the same engine and therefore has the flattener also. I asked that it be replaced, but the dealer convinced me that is wasn't necessar"
Anonymous, AZ (2001 Toyota Avalon XLS 3.0-L V6)"have failed inspection due to 4 missfire codes failing"
James F., NJ (2001 Toyota Avalon XLS 3.0-L V6)"There are two oxygen sensors, one before catalytic converter and one after. Both sensors needed to be replaced about i year apart"
Suh L., VA (2001 Toyota Avalon XLS 3.0-L V6)"repeated failures illuminate MIL"
Anonymous, ON (2001 Toyota Avalon XLS 3.0-L V6)"Check engine light on and off. Replaced sensors twice - very expensive- but remains problem. No problem passing emissions tests, so just sensor problem"
Martin F., CO (2001 Toyota Avalon XL 3.0-L V6)"Code P1155 - air/fuel sensor"
John J., OH (2001 Toyota Avalon XL 3.0-L V6)"Replaced a different sensor five times"
Georgette S., NY (2001 Toyota Avalon XLS 3.0-L V6)"The problem is probably in the sending system as neither gas mileage nor operation have suffered. The check engine light is on sporadically (i.e. not always on) due to this problem"
Anonymous, NC (2001 Toyota Avalon XLS 3.0-L V6)"Check Engine light stays on all the time. I ignore it, but it is a problem for emissions testing requirement."
Anonymous, NM (2001 Toyota Avalon XLS 3.0-L V6)"Failure to pass emissions testing because of both knock sensors, one O2 sensor and a wire harness. The harness and knock sensors are on the rear of the engine, resulting in a very large labor expense."
Wayne G., CT (2001 Toyota Avalon XL 3.0-L V6)"Engine light went on. Incorrectly noted at parts store. Dealer said it was a sensor in front of the muffer but was vague about this. Vague for $400."
Anonymous, MI (2001 Toyota Avalon XL 3.0-L V6)"Not really a problem with the sensor except it kicks the dashboard warning light ever so often since a engine cleaner was added to the fuel system. The extra stuff in the exhaust triggers this."
Anonymous, TX (2001 Toyota Avalon XL 3.0-L V6)"Constant issue. Would not allow us to put fuel in the tank at more than about 0.7 gallons at a time without shutting off the fuel flow. Dealt with it from about October 2019 until July of 2020 because of cost of parts (over $500)."
Anonymous, (2001 Toyota Avalon Unsure 3.0-L V6)"O2 sensor needed to be replaced after check engine light came on. Very expensive repair for old vehicle."
Anonymous, MB (2001 Toyota Avalon XL 3.0-L V6)"Check engine light O2 sensor and vapor recovery system has been happening the last10 years"
Anonymous, IN (2001 Toyota Avalon XL 3.0-L V6)"Check engine light came on. Had repaired by local mechanic. No more problem."
Anonymous, NC (2001 Toyota Avalon XL 3.0-L V6)"Check engine light. Apparently there are 2 sensors. They replaced one sensor, and it lasted for a couple of days. Check engine light again. They replaced the other sensor and I have had no more problems"
Anonymous, GA (2001 Toyota Avalon XLS 3.0-L V6)
"catalytic converter requires replacement"
Anonymous, NY (2001 Toyota Avalon XL 3.0-L V6)