codes reappear
Thread Starter
Instructor
Joined: May 2011
Posts: 237
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From: canfield ohio
codes reappear
this has probably been asked many times before, but here goes mine. Have a 09 coupe w/19000 miles. Coming home on turn pike last Sunday the check engine light came on. All functions are working fine. Did not go into a limp mode. I recently replaced the battery the week before. Our trusty mechanic scanned the codes and reported po171-00 and po174-00.(fuel system lean bank 1-2). conversation with fellow corvette owners similar problems had happened to them. There solution was the "o" ring in the back of the intake manifold was bad. Apparently GM had a recall or service alert on this situation. My car is 09, is the dealer obligated to fix this or is its on me? or is it soom other problem altogether ..any one have a solution on this.? I can take the manifold off myself. Im 75 years old but could get it done with my mechanic abilities. Just wandering if something else maybe going on. Any help would be appreciated . than ks in advance.
Safety Car
Joined: Dec 2007
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From: Magnolia Texas
Don’t know about the o ring and TSB on same but could be a problem with air flow around the MAF sensor. Look for a loose clamp or misaligned sensor. There was a problem in the ‘08-09 timeframe where air entering through holes in the bumper and at the seam at the bottom of the shroud would cause the lean codes you pulled. Easy solution was to tape the holes and seam with A/C metal tape.
Last edited by dpigguy; Jun 14, 2020 at 05:02 PM.
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Not true, TSB's will be paid for by GM but you have to have the issues associated with the TSB unlike a recall where every affected car is repaired regardless of its status
Last edited by 449er; Jun 14, 2020 at 06:24 PM.
Race Director
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From: Eastern
Other than that, the owner foots the bill.
Take the 2005 Manual column lock issue as an example. There is a TSB, which will cost the owner approx $450.00 to get done at a dealer. Unless it is a garage queen, each and every 2005 C6 manual vehicle will have this issue in due time. It is not a recall, only a Technical service bulletin because it is not a safety hazard, but it will prevent the car from starting.
I doubt that GM will offer any goodwill gestures to a 15 year old vehicle. They have enough issues on their new vehicles.
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TSB's will be free of charge in a car that is still under the warranty that is still active, or if the dealer decides to do a "goodwill adjustment"
Other than that, the owner foots the bill.
Take the 2005 Manual column lock issue as an example. There is a TSB, which will cost the owner approx $450.00 to get done at a dealer. Unless it is a garage queen, each and every 2005 C6 manual vehicle will have this issue in due time. It is not a recall, only a Technical service bulletin because it is not a safety hazard, but it will prevent the car from starting.
I doubt that GM will offer any goodwill gestures to a 15 year old vehicle. They have enough issues on their new vehicles.
Other than that, the owner foots the bill.
Take the 2005 Manual column lock issue as an example. There is a TSB, which will cost the owner approx $450.00 to get done at a dealer. Unless it is a garage queen, each and every 2005 C6 manual vehicle will have this issue in due time. It is not a recall, only a Technical service bulletin because it is not a safety hazard, but it will prevent the car from starting.
I doubt that GM will offer any goodwill gestures to a 15 year old vehicle. They have enough issues on their new vehicles.
Team Owner
Joined: Jul 2003
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From: Sun Coast of Florida
St. Jude Donor '03-'26
I believe that is a courtesy GM is extending to Corvette owners due to the hit or miss problems associated with the gas fume issue.
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I have a letter from GM telling me to take my car to a Chevy dealer to have this issue fixed free of charge if I experience the fuel smell issue....
Melting Slicks
Joined: Jul 2005
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From: Mt. Pleasant S.C.
The free of charge fix is a courtesy being extended to that one single individual TSB. It is not a blanket free of charge offer for ALL TSB.
To the OP, the dealer is not obligated to fix it. It may not be an o-ring at the back of the intake. Could be any air leak after the MAF. Could be the fuel pump going bad. Could be a number of things. Think there needs to be more investigation done before you go taking things apart. A smoke test would be a good start.
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Instructor
Joined: May 2011
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From: canfield ohio
so today I ve disconnected all vacuum lines from throttle body, cleaned the throttle body, disconnected anything else related. and still have the check engine light on.what else can I try..Getting frustrated . the car runs great but has P171 and174 code ????????
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Joined: Sep 2009
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From: Eastern
Have you checked the wiring and the connector for the heated O2 sensors to assure they are not contacting the exhaust.
Other than that, the evap system can also have a leak in one of the lines.
Good Luck
Other than that, the evap system can also have a leak in one of the lines.
Good Luck