Fix for C7 Cat 330 HP Stop Engine Light Coming On

[lacdubonnet]

fixed mine today after ayear of tech not knowing what he was doing

had first diagnosis my j9139 wasn't working
after asimple ohmn test there wasn't anything wrong with wiring.

problem was the boost pressure was to high in the motor should not exceed 25 psi mine was over that to 30 psi which triggered sensor on my dash to stop engine.

replaced sensor valve from cat part 2309944 ten minutes to change also make sure your air filter and fuel filter are good.cured my problem and

don't let them start replacing parts at random
this part was $350.00

good luck

[Skip426]

Was anyone able to scan for codes for you?
I believe I responded to your original post for your , can't scan for codes issue.

[lacdubonnet]

Originally Posted by Skip426

Was anyone able to scan for codes for you?
I believe I responded to your original post for your , can't scan for codes issue.

The tech had a laptop with the program and he scanned all the engine workings
scanning for codes not sure what you mean,he had just a visual of all the engine workings no codes

[Skip426]

Originally Posted by lacdubonnet

had first diagnosis my j9139 wasn't working
after asimple ohmn test there wasn't anything wrong with wiring.
good luck

Sorry , I thought I had responded to another post, where you were asking about, the plug ( j9139) not functioning. Maybe it was another member who had made that post.