Vehicle is starting and when I put on D or Reverse it moves on idle speed. When I accelerate their is no rev. I tried changing battery. Still the issue is same 

Hi Saf

 

Do you have an yellow engine light on the dash??

If you have a JODB compatible reader that should, hopefully give some clues. Clear the existing codes and wait for it to happen again then read again. It may be something like an air or fuel filter that needs replacing, but more likely would be a lambda sensor - the code scanner will point you in the right direction - there are lots of post on the forum.

Will it rev with the accelerator pedal, out of gear?

If not, suspect the throttle position sensor.

2 hours ago, Alphard Club said:

Hi Saf

 

Do you have an yellow engine light on the dash??

Yes. I get the check light. 

3 minutes ago, BigNev said:

Will it rev with the accelerator pedal, out of gear?

If not, suspect the throttle position sensor.

Thank you. No it dose not rev on ideal (N) position 

10 hours ago, Gamith said:

If you have a JODB compatible reader that should, hopefully give some clues. Clear the existing codes and wait for it to happen again then read again. It may be something like an air or fuel filter that needs replacing, but more likely would be a lambda sensor - the code scanner will point you in the right direction - there are lots of post on the forum.

Thank You All for the help. So it should be a (J OBD) or (OBD J) ? OBD 2 will not work? I'm in Canada. Thank You. 

need to be JOBD

icarsoft scanner for Toyota (needs to be Toyota/Lexus version)

 

 

On 8/15/2025 at 8:32 PM, BigNev said:

Will it rev with the accelerator pedal, out of gear?

If not, suspect the throttle position sensor.

 

Or also the motor for the throttle actuator?

Thank you all. Finally with many research, found out the issue was due to a 10amp fuse (ETC).  The best thing some mechanics suggest it is a gear box issue and one timing belt. LOL. 

Aha!! Excellent!

Would that be Electronic Throttle Control?

I was on the right path, brownie points to me 😃

 

I'm constantly amazed how dumb some people are, who are supposed to do "the subject" for a job- how the hell could a gearbox problem stop an engine revving??

If it was in limp mode it would still rev to some extent.

It would rev if the gearbox wasn't there!!

And timing belt - your 3.5 doesn't have one!!

But regardless, if it did, and slipped, if it ran it would rev.

Edited August 18Aug 18 by BigNev
Corrected the engine size 😃