cel comes and goes, slight hesitation at low speed acceleration. 4cyl and 224000 miles.

 

[quote]cel comes and goes, slight hesitation at low speed acceleration. 4cyl and 224000 miles. [quote]

definitely a hesitation, why not try to upgrade and have a shoot.

 

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.

 

Thanks, I'll give those a shot.