: Codes P0411 & P0171



whoareyou4
09-14-06, 08:23 AM
Hi everyone, I'm new to the group, I visited last Saturday and registered yesterday. We purchased a 2001 Catera recently with 89k miles.
A couple of codes have popped up in the last couple days and I wondering if I can get some help diagnosing them,
or figuring out where to start looking.

Here they are:

P0411 - Secondary air injection sysytem incorrect flow

&

P0171 - System to lean(Bank 1)
(Is bank 1 drivers side or passenger side?)

I cleared the codes last evening, so right now I'm waiting to see if they come back, I expect they will. Perhaps P0171 could be due to poor fuel, but I'm not sure.

Any help is appreciated. Thanks

1998catera
09-14-06, 06:06 PM
I have a 1998 Cat and let me tell you, if you ignore the P0411 code...its much less of a headache...doesnt hurt anything. Ours has been on for oh, 2 years? But Im selling it for a 2001 Eldorado ETC...anyone want my car? 70k miles...all upgrades done...you know, all those probs that I fixed when i got it LOL

Warez
09-15-06, 01:24 PM
I cleared the codes last evening, so right now I'm waiting to see if they come back, I expect they will. Perhaps P0171 could be due to poor fuel, but I'm not sure.

For myself and a a few other on this board it was a bad MAF sensor.