Question about 2003 Lexus Gs 300

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Engine & VSC lights up + high rpm in Nutral

For some reason I unpluged the throttle wiring socket when engine off, then take it back & start the engine; I was suprised that engine & VSC lights up + rpm goes at 1800rpm in Nutral mode. I tryed to disconnect the negetive battery led and connect it again in order to get everything to normal but still problem remain

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3 Answers

SOURCE: 2001 Lexus LS 430 the

Apparently, the most common cause is a loose gas tank cap. It has to be tightened until it clicks. Other, more serious faults can cause this indication, but the loose cap issue is widespread. Hopefully, that's all it is in your case!

Posted on Feb 12, 2009

mkv0525
  • 358 Answers

SOURCE: High rpm (fast idle)

it is normal. car is designed to do this when engine is cold. it called open loop. when it warms up it is called closed loop.

Posted on May 21, 2009

emissionwiz
  • 75822 Answers

SOURCE: my engine light is on

when the check engine light is on it is to alert you to the fact that a trouble code has been stored in the computers memory, there are over 200 such fault/trouble codes so guessing is not an option, u will need to have the OBD 2 engine control system tested and then post the trouble code back here, there will be a code.

Posted on Aug 14, 2009

iambanshee74
  • 3489 Answers

SOURCE: my car hesitates when i stop and when i slow down

chances are you have a vacuum leak. it is going to take some searching and looking at vacuum hoses.

Posted on Nov 02, 2009

Lloyd Six
  • 560 Answers

SOURCE: 2007 lexus rx350 ,vsc light on and check engine light is flashing

It will be a sensor fault. At this stage we would be totally guessing. Go to your nearest auto parts store that offers free code - reading

Get the code & post it on here, I can then get you exactly in the right direction

Kind regards

Lloyd

Posted on Dec 29, 2009

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YOUR CAR ENGINE IS ETC SYSTEM ? (electronic throttle control) i think need clean the throttle body first .disconnect the ETC fuse & EFI fuse in fuse box more 1min .after connect back the fuse .turn switch on 1min.off all electrical A/C or lighting .star the engine hole the throttle 2500-3000rpm 3 min .last turn off engine & start the engine .this is ETC learning .

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Here is a web site to show you a picture of what you are looking for: http://www.theautopartsshop.com/auto+car-usa+parts/ford+focus+idle-air-control-valve.html

Here is how to fix it:

  • Unplug the electrical connector on the IAC valve located on the back of the throttle body near the firewall. No tools are needed to unplug the connector. Squeeze the release tab on the plug and pull to remove it.

  • Unbolt the two 8-mm attaching bolts attaching the IAC valve to the throttle body using an 8-mm socket and socket wrench from the socket set. Remove the IAC valve and gasket from the engine compartment.
  • Position the new valve and gasket in place on the throttle body, and bolt it to the throttle body using the 8-mm bolts and the socket and socket wrench. Avoid over-tightening as the throttle body is easily stripped out by over-tightening the fine-thread 8-mm bolts. Plug the electrical connector into the new valve, and push it on until it snaps into place.
  • Turn the ignition key to the run position but do not start it at this time. Unplug the electrical connector once again, and turn the key off.

  • Start the engine, and adjust the minimum air rate by turning the adjusting screw located on the throttle cable side of the throttle body until the idle speed is 650 rpm plus/minus 50 rpm. Turn the engine off, and plug the electrical connector back in--pushing until it clicks into place.

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    Sounds like a MAP inlet Manifold Absolute Pressure sensor fault. Symptoms of a faulty MAP


    • Poor starting/erratic idling/engine stall - with the MAP not sending the correct inlet air pressure signals to the ECU, incorrect fuel injection volumes then result. The imbalance in the fuel/air ratio often leads to rough engine performance and poor starting and stall. The engine might be kept running at start up by pumping the accelerator pedal
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