2003 Lexus Gs 300 - Answered Questions & Fixed issues

Yes the O2 sensor preheater problem will turn on the VSC light, see the complaint often, why? don't know.P0031 TOYOTA - Oxygen Sensor Heater Control Circuit Low Bank 1 Sensor 1In most cases the O2 being replaced cures the code but here is the full story.Possible causes- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit open shorted to ground- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection- Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit- Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit fuse- Faulty Engine Control Module (ECM)

How many air fuel ratio sensor and oxygen sensors does a 2003 Lexus ES300 have and can I have a diagram of each sensor and where each sensor goes thank you

May need new actuator. Try a slight lubricant like wd40 if that does not work. Try working switch back and forth. They usually start having problems when they get this old. You can have it replaced, but toyota /lexus is notorious for labor intensive repairs with can be costly if you take it to a dealer or very time consuming if you replace the actuator yourself.

Do you have power and ground at the blower motor ?

Is distributor turning?Is there power to dist?Is there power to coil?Is there a resistor on the coil, is busted?

Jesse, I fixed all my door locks on my 2003 GS300 in one day. Go to http://www.youtube.com/watch?v=5VqGy7_X9MM and watch part 1 and 2 a couple times. Go to http://www.ebay.com/itm/4-pk-MABUCHI-CAR-DOOR-LOCK-MOTORS-DIY-ACTUATOR-REPAIR-Toyota-Lexus-Honda-Ford/121175954510?rt=nc&_trksid=p2047675.m1851&_trkparms=aid%3D222002%26algo%3DSIC.FIT%26ao%3D1%26asc%3D261%26meid%3D2128480711916629784%26pid%3D100005%26prg%3D1088%26rk%3D1%26rkt%3D5%26sd%3D120785401379%26and purchase 4 motors for under $20. It is the motors in the actuator that have failed. You will also need a gear puller also from ebay at http://www.ebay.com/itm/Walkera-gear-puller-for-rc-helicopter-TREXESKY-motors-/180614084429?pt=Outdoor_Toys_Structures_US&hash=item2a0d70374d for about $14.So for under $30 you can easily fix it yourself. Hope this helps,Les

Have you had the computer checked for trouble codes yet ?

Should not be a person today driving any vehicle ,thatdoes not know what to do when any dash light comes onHave the vehicle checked for codes & issues resolvedat a repair shop

If it is, the check engine light should be on.Have you had the computer checked for trouble codes ?

My 2000 Lexus GS 400 just had the VSC/VSC off light and the check engine light come on. I would have to push the accelarator peddle all the way down to get it to go. Took it to the Toyota dealer and the code pulled up as the Throttle Position Sensor was out. Purchased one and having it put in. Will update if this fixes the problem.

try changing the fuel filter and adding injector cleaner to full tank of gas

Check my previous posts for this symptom.

To do a "Tune-up" you will need 6 spark plugs, a throttle body gasket, an air filter, an air compressor, a blow gun, a magnetic pick-up tool and a socket set with ratchet and extensions.
You must remove the intake air resonator, the #3 timing belt cover, the accelerator cable, the throttle control motor connector, the throttle position sensor connector, the accelerator pedal position sensor connector, the throttle body bracket and the throttle body. Then remove the spark plug cables and the ignition coils. You will then crack the spark plugs loose 1/4 turn and use the air compressor and blow gun to blow the debris out of the spark plug tubes so it does not enter the combustion chamber when the spark plugs are removed. Then remove the spark plugs. You will need the magnetic pick-up tool to fish the plugs out of the tubes once they are completely unscrewed.
Install new spark plugs and torque them to 13 ft.lbs (18 Nm)
Install throttle body with nw gasket. Install all other parts removed and connect all connectors.
Install intake resonator and new air filter.

take to local parts store to retrieve code vsc/trac are in failsafe because of thcheck engine light once you have code then we can diag problem with engine

A seized up door lock actuator. You can try freeing it up by spraying a good penetrating oil, my favorite is PB Blaster. If it wont free up you will need to replace it.

1. Expect spark-plug work to be tedious. If this is your first time, plan 3 or 4 hours after engine cools (or 1 hour on several days), allowing 15 minutes per plug. It is harder than changing air filters, fixing flat tires, or starting a mower.
2. Consult your vehicle's manual. Look up where your spark plugs are, how many you have, the correct "gap", and the size socket needed to remove them. Also write down the vehicle's make, model, and year. The gap can also be found on the emissions label under the hood.
3. Visit your local auto parts store. Find (either by looking up in the provided reference book or by asking an employee) the correct spark plugs for your vehicle. The store also has socket wrenches, plus spark-plug sockets (with gasket), and socket-extension rods or swivel-joints to reach recessed plugs.
4. Find out (from the reference book, the packaging, or the employee) if these spark plugs need to be "gapped". Some modern plugs should not be gapped (but others can have different gaps, depending on use in either 6-cylinder or V-8 engines, etc.).
5. Park vehicle, turn off the engine, and open the engine compartment, to cool for hours. (WARNING: After running a car for a long time, the spark plugs can be the hottest part of engine! While it can require several hours to cool enough, it can require several weeks to heal burnt skin.) Especially with aluminum-head engines, let cool to room temperature to reduce the probability of damaging the threads.
6. Take (if needed) a wire-gauge spark plug gap tool and adjust the distance between the two electrodes. Between the electrodes is where a spark is made. One electrode will be an L-shaped piece of metal (hook), the other a metal prong centered directly across from it. Set the gap between the two electrodes, from .028-.060 inch, such as .035/.040 /.043 /.050, as in book (see Tips below).
7. Collect tools & new plugs (perhaps in a tool-tray). Remember which direction the socket-wrench switches to reverse/unscrew: wrench might not be visible when working back plugs.
8. Check fit of new plugs inside wrench-socket gasket. If new plugs stick to rubber gasket, consider removing gasket with screwdriver in square hole, to just use tape. Like taping screws to a screwdriver, the socket can be taped to spark plugs (not the threads) with scotch tape, for easy release once inside the engine. Otherwise, have pliers to pry the socket off new plugs once installed.
9. Locate (with the help of your manual or a repair manual for your vehicle) the distributor spark-plug cables/wires. The number of wires will be equal to the number of spark plugs your engine has. Often these wires are red or black, and will be equally divided on opposite sides of the engine.
10. Using masking tape, mark each of these wires for where they connect. Don't rely on memory: if interrupted, easy to forget, and engine can run rough with crossed plug wires. For 8 cylinders, deducing plug connections is almost impossible (120 choices for 5 wires) -- in that case you must contact an expert or study wiring guides.
11. Remove each spark-plug cable, pulling the caps (to avoid breaking cable wires). Caps should come loose by very intense twisting/pulling (avoid jerking/hitting fingers).
12. Using compressed air, pressurized engine cleaner, or a brush, clean all debris from around the plug.
13. Using a spark-plug socket, remove each plug from the engine, and replace each with a new spark plug. Don't over tighten (usually just 1/16 turn, after finger-tight).
14. Replace the spark-plug cables on the same plugs they originally came from, and remove the masking tape.
15. Remove tools near engine (beware the moving belts), close your engine compartment, and start your vehicle.

I hope this helps.

For 2003 Lexus GS 300 the engine oil change recommendation interval is at 10.000 miles or 12 months. Oil filter renew.

Check your owners manual/maintenance interval, but if I were you I would at least do an inspection. If the belt breaks or even slips a tooth, you will be stranded. The belt could possibly last another 150K, but I wouldn't want to risk trying. If you need more advice, please feel free to reply.

Why dont you become a member of the lexus owners club. They will answer EVERY Question about the car, and tell you EXACTLY What To Do. Happy Days.
http://www.lexusownersclub.co.uk/forum/index.php?showtopic=8105

find starter relay in fuse box , remove this relay and jump it