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A few times at a stop when I tried to accelerate it would hesitate for a few seconds.
A few of ChatGPT answer Hybrid system transition delay
The TX500h switches between electric motor and gas engine.
When you hit the accelerator, the gas engine may need a moment to kick in.
A brief hesitation (1–2 seconds) can happen, but it shouldn’t feel excessive or frequent.
Software / calibration issue
Newer models like this sometimes need ECU or hybrid system updates.
Lexus has issued updates in the past for throttle response smoothing.
I had a 2018 MDX hybrid and it never had this issue at a stop. It did have an issue on the freeway the RPM would go up and down and software update fixed the issue.
I'll have to ask the service center if there's any updates or if that's normal for the switching from gas to hybrid.
A few times at a stop when I tried to accelerate it would hesitate for a few seconds.
A few of ChatGPT answer Hybrid system transition delay
The TX500h switches between electric motor and gas engine.
When you hit the accelerator, the gas engine may need a moment to kick in.
A brief hesitation (1–2 seconds) can happen, but it shouldn’t feel excessive or frequent.
Software / calibration issue
Newer models like this sometimes need ECU or hybrid system updates.
Lexus has issued updates in the past for throttle response smoothing.
I had a 2018 MDX hybrid and it never had this issue at a stop. It did have an issue on the freeway the RPM would go up and down and software update fixed the issue.
I'll have to ask the service center if there's any updates or if that's normal for the switching from gas to hybrid.
I didn't notice a hesitation of 2 seconds. The vehicle would power on the engine at higher rpms.
For lower rpm, it feels almost instant with the electric motors of the hybrid system.
I would try to accelerate and it would pause like it's thinking.
I found this TSB L-SB-0026-25, took my car in for the ML amp replacement and also for the display fix in late 2025, I didn't see if they applied this TSB.
I would try to accelerate and it would pause like it's thinking.
I found this TSB L-SB-0026-25, took my car in for the ML amp replacement and also for the display fix in late 2025, I didn't see if they applied this TSB.
