HVAC codes B0361 and B0441
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HVAC codes B0361 and B0441
I've got an '04 Z06 which threw these codes today and the CHECK ENGINE light appeared. I went back and cleared the codes and the CHECK ENGINE light went off but the codes reappeared. The code are stated HVAC Actuator Feed Circuit. Any idea what to check before I have to take it to the dealer, which I dread doing.
I did notice that at some point while driving to the St. Jude Fundraiser that I was feeling warm air on the driver's side. Could it be something to do with the vent doors in the system. Seems like I read somewhere that the doors have to be recalibrated?
I did notice that at some point while driving to the St. Jude Fundraiser that I was feeling warm air on the driver's side. Could it be something to do with the vent doors in the system. Seems like I read somewhere that the doors have to be recalibrated?
Race Director
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From: Saint Augustine, FL
Mid-TN Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Here's a little info on what I went through.
http://forums.corvetteforum.com/show....php?t=1465931
Being a 2004, you have a newer HVAC head unit, so it should compensate for an out of calibration actuator. I would try disconnecting the battery and see what that does for you. My guess, you have a broken gear in your actuator.
Let us know what you find out.
Edit - Also, try holding down RESET on echo of the codes, and see if that helps. It should force a recalibration of the doors.
One more thing, on my 99 Vette, I didn't get a check engine light with these codes, I felt the hot air and decided to check the codes. Maybe later year Vette set off the Check Engine Light?
http://forums.corvetteforum.com/show....php?t=1465931
Being a 2004, you have a newer HVAC head unit, so it should compensate for an out of calibration actuator. I would try disconnecting the battery and see what that does for you. My guess, you have a broken gear in your actuator.
Let us know what you find out.
Edit - Also, try holding down RESET on echo of the codes, and see if that helps. It should force a recalibration of the doors.
One more thing, on my 99 Vette, I didn't get a check engine light with these codes, I felt the hot air and decided to check the codes. Maybe later year Vette set off the Check Engine Light?
Last edited by JR_VETTE; Oct 9, 2006 at 07:28 PM.
Racer
Joined: Aug 2006
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From: Orlando Fl
I have an '04 Z06 also and I am getting the HVAC codes as well. I was told that it is the acutator. I am getting the same thing. Warm on drivers side. Replacing it requires getting behind the center vent I am told. I am going to use the opportunity to put in the billet bezels on the gauges. I also don't think the check engine light will go on with those codes. Check again, you probably have another code as well. Good luck.
Thread Starter
Former Law Dawg Moderator
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From: Eads, Tennessee
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The only current codes I had were B0441 and B0361, which were HVAC actuator related. History codes were P0174, U1016, and B0367. So I disconnected the battery and cleared out all the codes but the HVAC codes returned. I again cleared them out and took it for a short drive and they seemed to have remained cleared. Maybe the actuator indexed itself.
That still doesn't explain my CHECK ENGINE light, but it disappeared also. Maybe my car had to fart.
Code P0174 is Fuel Trim System Lean. Could that have activated the CEL? What exactly is that code saying, maybe a glitch in the computer pretaining to the fuel mixture? If it is, it cleared itself.
That still doesn't explain my CHECK ENGINE light, but it disappeared also. Maybe my car had to fart.
Code P0174 is Fuel Trim System Lean. Could that have activated the CEL? What exactly is that code saying, maybe a glitch in the computer pretaining to the fuel mixture? If it is, it cleared itself.
Last edited by Tact; Oct 10, 2006 at 09:00 AM.
Race Director
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From: Saint Augustine, FL
Mid-TN Events Coordinator
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Tact
The only current codes I had were B0441 and B0361, which were HVAC actuator related. History codes were P0174, U1016, and B0367. So I disconnected the battery and cleared out all the codes but the HVAC codes returned. I again cleared them out and took it for a short drive and they seemed to have remained cleared. Maybe the actuator indexed itself.
That still doesn't explain my CHECK ENGINE light, but it disappeared also. Maybe my car had to fart.
Code P0174 is Fuel Trim System Lean. Could that have activated the CEL? What exactly is that code saying, maybe a glitch in the computer pretaining to the fuel mixture? If it is, it cleared itself.
That still doesn't explain my CHECK ENGINE light, but it disappeared also. Maybe my car had to fart.
Code P0174 is Fuel Trim System Lean. Could that have activated the CEL? What exactly is that code saying, maybe a glitch in the computer pretaining to the fuel mixture? If it is, it cleared itself.
As for the actuator, just drive it and see if it comes back. I know before I finally had to reindex mine, I could disconnect the battery and be fine for months before the code would popup again.
Also, that B0367 is Right Actuator Feedback Open
You might have some sort of HVAC head problem since both actuators are throwing codes.
Last edited by JR_VETTE; Oct 10, 2006 at 09:18 AM.
Melting Slicks
Joined: Jun 2004
Posts: 3,439
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From: Newark, DE
St. Jude Donor '06
Originally Posted by Tact
History codes were P0174, U1016, and B0367. So I disconnected the battery and cleared out all the codes but the HVAC codes returned.
. . .
That still doesn't explain my CHECK ENGINE light, but it disappeared also. Maybe my car had to fart.
Code P0174 is Fuel Trim System Lean. Could that have activated the CEL? What exactly is that code saying, maybe a glitch in the computer pretaining to the fuel mixture? If it is, it cleared itself.
. . .
That still doesn't explain my CHECK ENGINE light, but it disappeared also. Maybe my car had to fart.
Code P0174 is Fuel Trim System Lean. Could that have activated the CEL? What exactly is that code saying, maybe a glitch in the computer pretaining to the fuel mixture? If it is, it cleared itself.
BTW, P0174 is "Fuel Trim System Lean Bank 2" and P0171 is the complimentary code for bank 1. Bank 1 = driver side; bank 2 = passenger side. When not at idle or WOT, ideal LTFTs are ~ 0 (zero) to -4. HTH!
Last edited by Mr. Lucky; Oct 10, 2006 at 09:59 AM.
Thread Starter
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Thanks for the help guys. Everything is reset now and there are no codes. The CEL is also reset. I'll drive it again this afternoon and see what happens.
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Burning Brakes
Joined: Sep 2006
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From: Seoul Korea
Originally Posted by Tact
Thanks for the help guys. Everything is reset now and there are no codes. The CEL is also reset. I'll drive it again this afternoon and see what happens.
I see you have a Z...... I would also assume you have some kind of CAI.... if that's the case, I would be willing to bet that your 0174 comes back read this.
http://forums.corvetteforum.com/show...post1557235850
Thread Starter
Former Law Dawg Moderator
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From: Eads, Tennessee
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I do have a Donaldson Blackwing with an icebox cover. Are you saying that the intake is causing my engine to run too lean?
Burning Brakes
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From: Seoul Korea
Originally Posted by Tact
I do have a Donaldson Blackwing with an icebox cover. Are you saying that the intake is causing my engine to run too lean?
Yes and no........lol, go back to that thread that I linked you too and read my update.
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Originally Posted by HisandHerZ06
Yes and no........lol, go back to that thread that I linked you too and read my update.
Burning Brakes
Joined: Sep 2006
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From: Seoul Korea
Originally Posted by Tact
So......you installed a screened MAF and that cured your problem with it throwing codes?
Yup, 100% And makes total sense. I obviously didn't come up with this on my own......... I wish. The biggest contribuator to me deciding going this was was Halltech, I just proved it works without a tune. And the more I thought about it the more it made sence, And was even able to convince a local dealership to not only replace it, but let me keep my unscreened maf, Just in case. The reason they did this is cause the problem was present when I purchased the car (1 1/2 months ago). If you do as much research as I did all over the internet on this you will see that a lot of people just get a "tune" to fix it, which it does....... Basicly the tune just adjusts for the unmetered air (but what about when the air is more/less dence? that's why I wanted to find the right fix, not a cover up). Also if you do research on why GM "thought" we wouldn't need a screen due to the air flowing straight, well, we do! And that is why even the 505hp Z06 is screened.
Thread Starter
Former Law Dawg Moderator
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From: Eads, Tennessee
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St. Jude Donor '05 thru '24
Originally Posted by HisandHerZ06
Yup, 100% And makes total sense. I obviously didn't come up with this on my own......... I wish. The biggest contribuator to me deciding going this was was Halltech, I just proved it works without a tune. And the more I thought about it the more it made sence, And was even able to convince a local dealership to not only replace it, but let me keep my unscreened maf, Just in case. The reason they did this is cause the problem was present when I purchased the car (1 1/2 months ago). If you do as much research as I did all over the internet on this you will see that a lot of people just get a "tune" to fix it, which it does....... Basicly the tune just adjusts for the unmetered air (but what about when the air is more/less dence? that's why I wanted to find the right fix, not a cover up). Also if you do research on why GM "thought" we wouldn't need a screen due to the air flowing straight, well, we do! And that is why even the 505hp Z06 is screened.
Thread Starter
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St. Jude Donor '05 thru '24
I just got back from a relaxing drive and when I got back I had no codes and the CEL did not come on either. I will say that my Blackwing intake has been installed for a while and I have never noticed the CEL before. After I cleared all the codes, including P0174, the CEL cleared itself and nothing has reappeared. Do you think my system adjusted itself or is it a matter of time before the CEL will reappear?
Burning Brakes
Joined: Sep 2006
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From: Seoul Korea
Originally Posted by Tact
I just got back from a relaxing drive and when I got back I had no codes and the CEL did not come on either. I will say that my Blackwing intake has been installed for a while and I have never noticed the CEL before. After I cleared all the codes, including P0174, the CEL cleared itself and nothing has reappeared. Do you think my system adjusted itself or is it a matter of time before the CEL will reappear?
Obviously every car will act differently.... everyones driving style is different. In the just over a month I was dealing with this it actually went almost a week one time before it came back on. After seeing Halltech and many other tuners say the screenless maf is inaccurate, that's why I really wanted to have mine switched. I say if it does come back on, try to find a used/cheap screened one, or borrow one, and see if it ever comes back. I guess if it doesn't come back on, then maybe you're good.
Thread Starter
Former Law Dawg Moderator
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From: Eads, Tennessee
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St. Jude Donor '05 thru '24
Originally Posted by HisandHerZ06
Obviously every car will act differently.... everyones driving style is different. In the just over a month I was dealing with this it actually went almost a week one time before it came back on. After seeing Halltech and many other tuners say the screenless maf is inaccurate, that's why I really wanted to have mine switched. I say if it does come back on, try to find a used/cheap screened one, or borrow one, and see if it ever comes back. I guess if it doesn't come back on, then maybe you're good.
Burning Brakes
Joined: Sep 2006
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From: Seoul Korea
unfortunalty no, since it doesn't happen with the stock box, I however did get to work with a very smart and open minded service manager who was open for idea's. The only reason I got it free, is cause I bought the car with the CAI on it, and the SES light was on when I picked the car up, so they had to fix it at whatever cost. And him being a "power" kinda car fan, didn't really want to see the CAI go away.
Burning Brakes
Joined: Sep 2006
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From: Seoul Korea
OH and BTW the other 2 codes dealing with the HVAC thingy..lol, codes I also had and I guess there is a TSB out about that, not a recall, all they had to do to mine was look at the pn's on 2 pieces and then do some kind of calibrating.
