8 Codes, What the heck?

VOLKSWAGEN
Avatar
DDCYR40
  • MEMBER
  • 41 POSTS
Hi, I've got a 2000 VW Jetta 2.0L and the check engine light has been on for a year or so, and i just got them checked at an oil change and here is the list:
Po134 - 02 Sensor Ckt - no activity (bank 1 sensor 1)
P1128 - manufacturer controlled fuel and air metering
Po442 - Evap emission control system leak (small)
Po300 - Random/multiple cylinder misfire detected
Po301 - Cylinder 1 misfire detected
Po171 - System too lean (bank 1)
Po304 - Cylinder 4 misfire detected
Po302 - Cylinder 2 misfire detected

it has been getting poor gas milage and sometimes stutters at a stop light in drive. i've ordered an o2 sensor for before the catalytic converter. looks like most of this could have been caused by a faulty one. any idea if i am diagnosing it wrong. it is going in tomorrow to get the o2 sensor changed, so if you can reply asap, it would be great. Thanks a lot.
Feb 19, 2007 at 11:30 AM
Advertisement
Avatar
CHEVY22
  • CERTIFIED EXPERT
  • 1,375 POSTS
check engine light on for a year is noooo good , i would start by replacing the 02 you have a code for and the misfires may go away but maybe not , the vw's have coil issues also , but start with what you know is bad the 02 sensor and maybe a maint tune up since its been running like that so long
Feb 19, 2007 at 11:51 AM
Avatar
DDCYR40
  • MEMBER
  • 41 POSTS
what would you suggest for a tune-up? Plugs? I don't really know what else, air filter just was changed along with oil. It hasn't had the timing belt changed, or that I know of, (I've owned since 65,000 miles and it is at 89,000 now). Any idea on the labor of a timing belt? anything you can give me here is much beneficial. thanks
Feb 19, 2007 at 1:38 PM
Advertisement
Avatar
CHEVY22
  • CERTIFIED EXPERT
  • 1,375 POSTS
the 02 for starters , then plus and wires , you might want to check the manual on the t belt i think its at 90k and im not sure on the labor , but def what i listed first ,in that order ,and then reset the pcm and drive it for a while and see hwat happens , atleast you can do those repairs on your own and same chunks of cheese
Feb 19, 2007 at 9:35 PM
Avatar
DDCYR40
  • MEMBER
  • 41 POSTS
i replaced the o2 sensor, and has been running for over 2 weeks with no codes and good gas mileage. i guess that solved the problem. thanks
Mar 5, 2007 at 10:38 AM
Avatar
CHEVY22
  • CERTIFIED EXPERT
  • 1,375 POSTS
good job
Mar 5, 2007 at 2:12 PM