Code P1233, engine lost power while driving?

CANDYBSMITH

MEMBER
2012 INFINITI M37
3.7L
V6
AUTOMATIC
209 MILES

I was driving and I lost engine power. Would not go over 2600 rpm's or 30 MPH. Service engine soon light is on now. Scanner shows code p1233.

Monday, February 13th, 2023 AT 8:41 PM

1 Reply

BORIS K

MECHANIC
795 POSTS

Hello,

P1233- electronic throttle control bank 2
See image below

This is visible once the engine cover is removed
I would suggest first checking the throttle body for dirt on the butterfly.
Use some throttle body cleaner and clean it off, ensure that there is free movement

Good videos:
https://youtu.be/VAVCwcWHmtA
and
https://youtu.be/vhCSd-T4aSY

Inspect the connector at the throttle body, unclip from throttle body and check for possible corrosion. Clean with electro or contact cleaner

A good guide:
https://www.2carpros.com/articles/throttle-actuator-service

Cheers, Boris

Image (Click to make bigger)