Lexus RX 300 - Popular Questions, Answers, Tips & Manuals - Page 3

You have a problem in your Evaporative Emission Control System. Not much you can do without the right equipment. A mechanic needs to diagnose this with his testing tools. Good luck!

Has the system been tested for fault code? Do you have a check engine light on? Are the tires inflated to the correct air pressure? Do you jack rabbit away from stops? Is the engine in a good state of tune and all maintenance performed as needed?

run the fault codes to determine if there are any sensors operating out of set parameters your indications are that the HO2S sensors are not operating correctly or cannot set the ECM for the air/fuel ratio could be a problem MAP/Baro sensor, faulty injectors (spraying and not atomizing), low fuel pressure or simply at 17 years old or a guestimate Klm of around 340,000 klms the motor is a bit tired anyway run the fault codes first and then having a wet and dry compression test ( a qualified service mechanic will know what I mean) done will determine the engine condition

You will need to remove the clock and have it repaired.

Po171-bank 1 running to lean
air to fuel ratio not right not enough fuel supply
P0300-random/multiple misfire detected
check spark plugs, HT leads, injectors, ignition coils, low compression, wiring
P1325-no info found code doesnt excist

I don't live in a state that has emission laws, but that code is emission related. It should be a simple fix, since it is an older car I would go in order of highest probability that either the line is broken, the solenoid needs to be replaced, or a break/corrosion in the wiring. There could be a couple of other things but unlikely.

code p 0330 refers to knock sensor (KS)2 bank 2 ---circuit malfunction===causes wiring--KS---ECM it is possible that in changing the harness there is a problem connection or the connection to ks2 is not correct ( not on properly)

I don't believe that this model has a orifice tube. Sorry, it might be internal in another part

Yes, looks normal, and good. Calculated load is not much meaning, as it changes constantly. ECT of, oh that is centigrade, not sure how that translates to Fahrenheit, but it may be low from not running long... Your fuel trims (both short term and long term-STFT, LTFT) are very good-showing that fuel is not being added or subtracted by the computer to maintain correct air/fuel ratio. Fuel trim numbers should be close to zero. It is when fuel trim changes by double digits-either positive or negative-that there is an indicated problem. For example, say you had a vacuum hose leak- sucking in extra air to the engine- then you could see STFT number go positive by double digits-meaning the computer senses a lean condition and is adding fuel to compensate. But your fuel trims show the air/fuel ratio must be correct-no change in fuel trims-the positive 2.3 in LTFT is negligible- not a problem.

You have 2 of them,here's a link showing where their at,once you get to page,click on switch and relay. SENSOR KNOCK CONTROL 176 07 Fits LEXUS RX300 1993 2005 Part 8961512090... Here's a video showing you where they are at. 2000 Lexus Es300 Knock Sensor Location Repair

Did you replace the short wiring harness to the knock sensor, if not that is likely the cause of the issue.

Could also be the O2 sensor. Wiring comes into play also.

Yes it is absolutely.

So I talked to someone who suggested my battery might be dead and that I try charging it, but as "Bullmtnbiker" mentions, the horn blasted as soon as I connected the negative terminal of the battery to charge. Finally, I just tried connecting it and running into the vehicle to start it, and that stopped the horn blasts immediately and it started and ran fine. I just hooked up to a trickle charge overnight to get the wounded battery back in shape.

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My RX 300 leaked in the same spot. I had to replace the rubber gasket around the rear hatch lid. It stopped the leak.

On the top of the starter motor.

replace the stereo

1. REMOVE BATTERY
2. REMOVE AIR CLEANER ASSEMBLY
3. DISCONNECT INPUT TURBINE SPEED SENSOR CONNECTOR
4. REMOVE INPUT TURBINE SPEED SENSOR

Check attached drawing.

Past due for a tune-up? Dirty fuel injectors, clogged catalytic converter, dirty/clogged air filter, low tire pressure, transmission fluid low...? Dirty fuel filter?