[Tyc0]

The cold start is great with no stumbles, but once idle settles there are a few small hiccups and these are the codes I pulled. Once the car is up to temp there are no issues. I have been getting bank one fuel mixture control for a few days and was hoping the car just needed to learn. Is there any chance that bank one being so far off messed up bank 2? Anyway here are codes any help is appreciated. I plan on ordering both pre cat o2's and then if someone tells me different I can return them.

[Tyc0]

Bump?

[roadkillrob]

Seems to indicate a bad 02 sensor or wiring issue, have you checked the plugs and pins in the plugs check the wire isn't melted, it is complaining about the 02 sensor itself and also the heater circuit in the o2, so not unheard of to both fail at the same time but usually you get o2 codes without the heater code, so might be wiring that is your issue.

[Tyc0]

Originally Posted by roadkillrob

Seems to indicate a bad 02 sensor or wiring issue, have you checked the plugs and pins in the plugs check the wire isn't melted, it is complaining about the 02 sensor itself and also the heater circuit in the o2, so not unheard of to both fail at the same time but usually you get o2 codes without the heater code, so might be wiring that is your issue.

Two new o2's, still have mixture control code, no CEL. Must be injectors?

[ragingpanda]

Injectors or boost leak

[Walksincircle]

Can you test O2 sensor for bank one by switching connectors with bank 2?

[dpaul]

Originally Posted by Tyc0

Is there any chance that bank one being so far off messed up bank 2?

Nope

Originally Posted by roadkillrob

it is complaining about the 02 sensor itself and also the heater circuit in the o2,.

Agreed, Bank 1 pre-cat sensor has heater issue. But Bank 2 does not show any fault other than mixture.

Unlikely to be injectors - they'd have to fail on both banks at the same same time. Very unlikely to be the sensors themselves for the same reason (as the OP has already discovered).

So check the wires as RoadkillRob suggests - cheap and easy to do.

Originally Posted by Walksincircle

Can you test O2 sensor for bank one by switching connectors with bank 2?

Nope, you'll get a fault pretty quick if you do this.

[Tyc0]

Originally Posted by dpaul

Nope

Agreed, Bank 1 pre-cat sensor has heater issue. But Bank 2 does not show any fault other than mixture.

Unlikely to be injectors - they'd have to fail on both banks at the same same time. Very unlikely to be the sensors themselves for the same reason (as the OP has already discovered).

So check the wires as RoadkillRob suggests - cheap and easy to do.

Nope, you'll get a fault pretty quick if you do this.

O2's didn't fix, thinking it might be a tune issue since I'm on a base map that I'm working on with my tuner, he says he thinks he can fix it but seems weird I have a rough cold start.

[Tyc0]

Originally Posted by ragingpanda

Injectors or boost leak

How does a boost leak have anything to do with a rough cold start?

[ragingpanda]

Originally Posted by Tyc0

How does a boost leak have anything to do with a rough cold start?

Boost leak can cause mixture codes if you are still getting them, but injectors seems most likely the culprit for rough starts.

[Tyc0]

Update, injectors fixed!