1999 p1133 p0401 codes
#3
The 1133 code is for AF sensor malfunction.
0401 is for insufficient EGR gas flow.
Check out the 0401 issue first. Typical issues are stuck closed EGR valve, carbon built up in EGR system plumbing and ports, bad EGR VSV, leaking EGR vacuum control hoses.
0401 is for insufficient EGR gas flow.
Check out the 0401 issue first. Typical issues are stuck closed EGR valve, carbon built up in EGR system plumbing and ports, bad EGR VSV, leaking EGR vacuum control hoses.
#4
Thanks, I'll give those a shot.
Thread
Thread Starter
Forum
Replies
Last Post
awbooth
DIY - Do It Yourself
7
05-30-2021 03:40 PM