Have a 1997 lexus es300. few concerns: 1) idles high (1000 rpm in park 'cold'; 1500 rpm in park 'warm'); 2) while driving at 40mph and above, it seems the drive train buzzes/whirs with vibration felt through accelerator pedal... this comes and goes and varies in intensity; 3) vehicle seems to decelerate slower than normal ("holds speed"/ ineffective engine braking) when accelerator is fully released; 4) "ABS" light constantly on, "TRAC Off" light constantly flashes, and "check engine" came on while driving and has stayed on (regardless of fuel cap readjustments). Otherwise, runs/drives quiet, smooth, precise shifting. Any expert thoughts?

SOURCE: 1999 lexus es300

This has been happening to my car as well. It typically happens when your oxygen sensors start to wear out. Mine does it once in a while and I have the local auto store reset it. Go to your nearest auto store and have them tell you what code it is and ask them to reset the OBD so the light goes out. If the light comes on right away and the code has to do with your oxygen sensors, have them replaced. There are three, two are easy to replace, one takes some effort as it is in a tough to get to spot. The dealer will charge you a fortune to replace them so do it yourself or through a local mechanic. It is a very simple task other then the access.

Mike Vincent

• 358 Answers
• Posted on May 21, 2009

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.

Mike Vincent

• 358 Answers
• Posted on May 28, 2009

SOURCE: trac off and check engine light for lexus es 300

If the light comes back on you to retrieve engine codes and see if the car has a misfire on one of the cly.

SOURCE: I have a SHIFT SHOCK problem in LX570

It sounds like you need to get the auto flashed(computer re programming) I Live in Australia and thats whats happening here,the cars are being returned to the dealer to re programme the trans to correct the shifting faults,you would ask your self why is the oil being replaced or topped up on a new car and Lexus is known for its quality control,and technicians training,you may want to go to a different dealer if youre not getting satisfaction,this will fix your issues

SOURCE: I have a 90 Lexus

You need to test your Engine Control Unit (ECU) for fault codes.
This could be caused by several things:
- Coolant Temperature Sensor or circuit
- Intake Air Temperature Sensor or circuit
- A/C Signal circuit
- Power Steering Pressure sensor or circuit.
- Neutral Start Switch circuit
- Throttle Position Sensor or circuit
- Idle Control Valve or circuits
- ECU

You can check fault codes by placing a jumper between terminals E1 and TE1 in the check connector.
(See pictures below) Turn the ignition switch on and count the flashes of the Check Engine light.

If it flashes 2 times every second, this is normal (No codes present). If a fault code is present, the first group of flashes is the first digit in the 2-digit code. There will then be a 1.5 second delay and the second digit will be output. If there is more than 1 code present, there will be a 2.5 second delay, then the nexy code will begin tobe output.
It is recommended that you read the codes (flashes) several times to make sure you are reading them correctly.