Re: 05 STS P0174 and P0171
Posted: Sun May 05, 2019 4:20 pm
Guess what the other code was?
P0174, lean bank 2. Uh oh. Well that may explain why the light didn't go out like it usually does. Remember that thing I said about expecting the light to be on and then not scanning it which means there could be another issue present that I ignore? Yeah, that is this. And I have two scan tools. Freeze frame. Looks like it was at idle when the code set though the trims aren't like totally pegged but they are high. Bank 2 is considerably higher than bank 1 also. Not really expecting this I gave the engine bay a cursory visual inspection. I retorqued the intake bolts. Only the front driver's side moved. The other nine were tight.
However I found a disconnected breather tube. It draws metered air from the air intake into the driver's side valve cover. Now bank 2 is the driver's side. Maybe this was the issue? It should have effected the whole engine but clearly this is supposed to be connected. I disconnected it when I did the air filter on 4/20. Looking at my P0430 thread, the light came on a day later on 4/21!! Then it went out on 4/23 and also came back on that same day. It has been on since. I am optimistic that with the unmetered air leak fixed, the light might actually stay out long enough to get inspected. I do have a burnt out passenger side fog light but I didn't get the bulb yet and they may not care about fog lights. There is also the tint but hopefully I get somebody cool again.
P0174, lean bank 2. Uh oh. Well that may explain why the light didn't go out like it usually does. Remember that thing I said about expecting the light to be on and then not scanning it which means there could be another issue present that I ignore? Yeah, that is this. And I have two scan tools. Freeze frame. Looks like it was at idle when the code set though the trims aren't like totally pegged but they are high. Bank 2 is considerably higher than bank 1 also. Not really expecting this I gave the engine bay a cursory visual inspection. I retorqued the intake bolts. Only the front driver's side moved. The other nine were tight.
However I found a disconnected breather tube. It draws metered air from the air intake into the driver's side valve cover. Now bank 2 is the driver's side. Maybe this was the issue? It should have effected the whole engine but clearly this is supposed to be connected. I disconnected it when I did the air filter on 4/20. Looking at my P0430 thread, the light came on a day later on 4/21!! Then it went out on 4/23 and also came back on that same day. It has been on since. I am optimistic that with the unmetered air leak fixed, the light might actually stay out long enough to get inspected. I do have a burnt out passenger side fog light but I didn't get the bulb yet and they may not care about fog lights. There is also the tint but hopefully I get somebody cool again.