Code 1125

2003 ISUZU ASCENDER
198,230 MILES • 5.3L • V8 • 4WD • AUTOMATIC
Avatar
OMAEL
  • MEMBER
  • 1 POST
My car is Isuzu Ascender 2003 Limited Version..
It's missing fire, can't move. After do the scanning I received this code P1125 (talking about Throttle Position Sensor) and another code P0420 (oxygen sensor 01).
Please help me to solve those problems. Thanks.
Dec 25, 2019 at 4:38 PM
Advertisement
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,594 POSTS
Hello,

P1125 - The Power-train Control Module (PCM) detects that the difference between Accelerator Pedal Position (APP) sensor 1 and APP sensor 2 is more than the predicted value. This code can appear from one of two reasons first is the throttle bore is dirty and needs to be cleaned. The second is the throttle pedal sensor when bad lets try the cheaper of the two fist here is a guide to help you fix the issue. (I hope)

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

if this doesn't work here is how to change out the throttle pedal position sensor. Check out the diagrams (below). Please let us know what happens.
Image (Click to enlarge)
Attached Media
Jan 10, 2020 at 2:34 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle