Check engine light

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Mar 7, 2013 | 10:17 PM

Tim04C5

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Pro

Joined: Sep 2004

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From: Long Beach SoCal

Check engine light

I've had this come on before but it always clears by itself. The times it happened were mostly after putting in fuel. This time no fuel was added. It's been a few days now. All these codes were history, PCM P0171 + P0174, IPC B0516, and HVAC B0367. Does anyone have an idea what these are? Or any way I can clear them? Thanks..

Mar 7, 2013 | 10:23 PM

calvins

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From: Rotonda West, FL 2015 Z51 M7 3LT

Oldtimer

http://www.digitalcorvettes.com/foru...d.php?p=512062

Mar 7, 2013 | 11:38 PM

Tim04C5

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Joined: Sep 2004

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From: Long Beach SoCal

Quote:

Originally Posted by calvins

http://www.digitalcorvettes.com/foru...d.php?p=512062

Quote:

Originally Posted by 8VETTE7

The P0171 and P0174 are bank 1 and bank 2 lean on the O2 sensors. Likely causes are an air leak after the MAF. Check for cracked hoses and or loose clamps in the air intake system after the MAF.. It could also be caused by a gas cap that has a bad seal.

Roger that, I'll check those. Thank you both for your help!

Mar 8, 2013 | 07:51 AM

3sACROWD

Melting Slicks

Joined: Sep 2011

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From: Appleton WI

My vote is the gas cap needs to be replaced.

Mar 8, 2013 | 09:14 AM

Tim04C5

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From: Long Beach SoCal

I checked the air hoses for leaks/cracks and the gas cap seal, which appeared ok. I spun the cap in a few turns, and this morning, no more light! Thanks for the assist guys!!

Mar 8, 2013 | 03:44 PM

Road Runner

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From: Placitas NM

St. Jude Contributor '03 & '04

I've had very similar issues in the past. If you suspect the gas cap, take the O ring off it, clean it and put it back on.

rr

Mar 8, 2013 | 04:40 PM

PvtJoker21

Instructor

Joined: Apr 2008

Posts: 184

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From: Moorpark California

if you do not put the gas cap on all the way, or incorrectly or the threads dont match, it will throw a code at you. This is a big NO NO when you have to get a smog check!

Mar 8, 2013 | 06:18 PM

Tim04C5

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Joined: Sep 2004

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From: Long Beach SoCal

Codes are cleared, check, o-ring is clean, check. No more check engine light, check... thanks again to my corvette brothers

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Mar 16, 2013 | 11:34 AM

leetownreb

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Joined: Dec 2006

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From: Leetown WV

How do you clear the codes??

Mar 16, 2013 | 11:44 AM

#10

dadaroo

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Joined: Mar 2011

Posts: 6,835

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From: Columbia SC

I have an o-ring fuel cap on 2 of my cars. I like to put a little silicone lubricant on them so they seat well and don't stick when the cap is removed. Just a thing I do being an **** engineer.