2008 ES350 70,000 miles; gently driven and well maintained. Engine light on (with other lights too), car runs and purrs perfectly however. Took it straight to Lexus and was told the timing was off of the valves and cam gears causing engine to detect error code. Would need to replace cam gears. Erased codes for now. $4,000.00 to $5,000.00 estimated job when needed. Hard to imagine that this would be the case for this engine built by Toyota and rated as one of the most bulllet proof ever made.
Sounds like a timing belt issue. Toyotas will run forever if you change the timing belt every 100,000 km, or 65,000 miles
SOURCE: 95 Lexus ES 300 check engine light is on and the overdrive off light is flashing
chances are you don't have to replace the computer. the reason i tell you this is because you did not mention that the car is running lousy. no complaints of rough idle or missfire or hard starting. chances are that your engine speed sensor which sends the signal to the computer which then controls the transmission is most likely the culprit.. and it could just bhe that there is a loose connection between the two. if that is ok then your transmission control module is faulty. this is not the main computer, but the gobetween the trans and the ecm.. hope this helps please rate this...thanks(btw....the knock sensors control timing not the trans mission)
if your car no present any problem i think that mechanic is a thieft.
Sometimes the fuel have mixtures that make the check light on , to reset disconnect the negative battery few minutes, no go more to this mechanic,good luck
SOURCE: 2000 lexus es300 error code p0440, p0441, p0446
P0440 Evaporative Emission System, P0441 Evaporative Emission System Incorrect Purge Flow , AND P0446 Evaporative Emission System Vent Control Circuit
SOURCE: High RPMs
yes its related to knock sensor because car is running rich in fuel, and car runs of on safe mode, so overdrive will be off. have you and a friend replace it. remove intake assembly, then intake manifold, but first remove your anifreeze from radiator, trust me you want to remove antifreeze! their are brackets by the fire wall to hold down the manifold, thats the hard part is taking it off and putting that on since not to much space to work on it. on the block you'll see the two knock sensors, has 2 wires each, knock sensors cost between 150- 200 a piece, still cheaper than dealership putting it on. also buy some liquid gasket because you will need that. after putting it all back together reset the ecu and you should be fine,
SOURCE: ck engine light of Lexus Rx300 code is 171 sistem
YOU COULD HAVE AIR LEAKS AFTER THE MASS AIR FLOW SENSOR OR IN THE EGR OR PVC SYSTEM.YOU HAVE A MECHANICAL FAULT AFFECTING ONE OR MORE CYLINDERS EXHAUST LEAKS LOCATED IN FRONT OF THE A / FS OR HEATED OXYGEN SENSOR LOCATION.FUEL SYSTEM SUPPLYING TOO LITTLE FUEL DURING CRUISE OR IDLE FAULTY FUEL PUMP OR FUEL FILTER.FUEL INJECTOR ONE OR MORE DIRTY OR PRESSURE REGULATOR HAS FAILED.THESE ARE THE POSSIBLE CAUSES TO YOUR PROBLEM.
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It's a code P0115 that is showing. So I googled it and found a number of other complaints for this and similar models and year. I didn't see whether anyone was actually forced to do this massive engine job. So I wonder if it is a sensor or computer thing (I hope), or the precursor to a catastrophic repair. One person warned me that if you let this go and the motor ceases as a result, the damage will be much greater. How can this happen to a Toyota engine with relatively low mileage on it? I am freaked out. Thanks.
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