If the ECU is bad, keep in mind a used ECU will require an immobilizer reset service before the vehicle can be started. Used ECUs are available at a fraction of the cost of a new one.
Turn the key on and see if the light comes on, it should. If it doesn't , then someone has taken the light out or the ECM is bad. Put it on a scanner and have the codes read.
SOURCE: Engine RPM too high when transmission shifts. Bangs into gear.
check your fluid level when the car is warmed up
SOURCE: lincoln ls shifts hard into reverse
You will have to have the solenoid body replaced in the tranny and have the PCM reprogrammed.
SOURCE: transmission won't shift out of 2nd
I have had the same problem before. Everything you have said matches the exact problems I had. I was also driving down the road when my problems started. My speedometer stop working and my car wouldn't shift out of 2nd. I had a family friend who is a mechanic check it out. He hooked it up to the computer and it ended up being the Turbine Sensor. However you would want to hook it up and find out exactly which sensor it might be because there is another sensor that can cause that problem as well. I think this happend to me about a year ago but the part costed maybe around $30 or $40.
SOURCE: 99 Subaru Legacy auto Transmission will not Engage right away P-D
change fluid and filter
Testimonial: "Right on the money!"
SOURCE: not shifting into overdrive and check engine light
I'm not a lexus guy , but I'm thinking that you have a vacuum leak somewhere.
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