How to troubleshoot & fix the P-2138 code on a 05 Lexus IS300?

Question

I have a 05 Lexus IS300 with an automatic with180k miles on it. The car has recently been behaving differently. During acceleration & cruising speed the car's pedal would become soft and the car would lose its momentum. I did not have any check engine lights come up. This is all the in low rpm (2000 - 3500). The best way to describe it is when a transmission is slipping. I would put the car in manual mode and shift it myself. After a few days finally I lost all pedal and the engine check light came on. The car was hooked up to a computer and code p-2138 came up. I am reading the forums that say it's the throttle position sensor. Some people have said in the forums that even after replacing the TPS sensor the problem was still there. I am also finding articles saying that it's the pedal position sensor. Shoud I replace both sensors or could my issue be even worse a transmission going?

Answer 1

P2138  Throttle position sensor / switch  D / E voltage correlation

This code is the APP sensor and it is mounted on the throttle body, Make this repair easy, replace the throttle body it would come with the TPS, and the APP, You can always get a salvage one if you are weary for the repair.

Read more : https://www.autocodes.com/marketplace/

Read more :https://www.engine-codes.com/p2138.html