SES code....?
Thread Starter
Race Director
Joined: Mar 2006
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From: Everywhere and Nowhere at all
SES code....?
I'll try to make this brief....
So, I have not driven my Z in about 6-7 weeks... It has been sitting in the garage w a battery tender. I have also not driven it because I am waiting on my custom built Weld's for the front. So, a few friends stop by yesterday, one of which loan me his skinnies til my wheels arrive (good friend)! While my car sat, the inspection sticker went out and I decided to get it inspected, while driving there I throw a code... So, I pull over and manually delete all of the current, history codes... (for the record, my car never throws codes).
So the dude hooks it up and says something to the effect that the ECM cannot be read and that one of the 02's were "lazy". He inquired as to whether or not the car had not been driven in awhile or if the battery died...? He "claimed" it wasn't a big deal and that I should drive the car about 40-60 miles and to come back.... the car runs, drives magnificently... No issues at all... your thoughts? I also purchased an Fbod (roller) that they helped me push into my garage...
99HOSS....
So, I have not driven my Z in about 6-7 weeks... It has been sitting in the garage w a battery tender. I have also not driven it because I am waiting on my custom built Weld's for the front. So, a few friends stop by yesterday, one of which loan me his skinnies til my wheels arrive (good friend)! While my car sat, the inspection sticker went out and I decided to get it inspected, while driving there I throw a code... So, I pull over and manually delete all of the current, history codes... (for the record, my car never throws codes).
So the dude hooks it up and says something to the effect that the ECM cannot be read and that one of the 02's were "lazy". He inquired as to whether or not the car had not been driven in awhile or if the battery died...? He "claimed" it wasn't a big deal and that I should drive the car about 40-60 miles and to come back.... the car runs, drives magnificently... No issues at all... your thoughts? I also purchased an Fbod (roller) that they helped me push into my garage...
99HOSS....
Last edited by TXGS507; Apr 5, 2015 at 09:16 AM.
Melting Slicks
Joined: Jul 2013
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From: Anaheim CA
But I was under the impression that all the codes that would cause an emission test to fail would also turn on the 'check engine' light.
Melting Slicks
Joined: Jul 2013
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From: Anaheim CA
You caused the failure to pass emissions by clearing the codes. That resets the system Ready states and it requires a variety of driving conditions to reset them. ie NOT just highway driving. Usually requires a few ignition cycles as well. ie drive for a while stop shut off engine drive for a while......
Melting Slicks
Joined: Jul 2013
Posts: 2,012
Likes: 23
From: Anaheim CA
Well just disconnect your battery for a few seconds and then reconnect it. Do you get a CEL?? NOT likely unless there is some issue other than the "ready" sensors not being ready. But the car will not pass an emissions test (doesn't actually fail but cannot pass either) One of the few short comings of the C5 built in code detection system, it doesn't report the "ready" sensors.........
OP claimed his car didn't throw codes. My point is that, given the absence of the CEL, he is probably correct with regard to emission-related codes.
Thread Starter
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From: Everywhere and Nowhere at all
Thank you all for your input... makes total sense...
@chassed.. To clarify. I have NOT seen codes... As in I cannot remember the last time I saw a CEL...?
8VETTE7 got it exactly right.. Spoke w my tuner earlier today. thanks again, Ill wait for a few nice days and do a few cycles...
@chassed.. To clarify. I have NOT seen codes... As in I cannot remember the last time I saw a CEL...?
8VETTE7 got it exactly right.. Spoke w my tuner earlier today. thanks again, Ill wait for a few nice days and do a few cycles...
Le Mans Master
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Thread Starter
Race Director
Joined: Mar 2006
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From: Everywhere and Nowhere at all
Melting Slicks
Joined: Jul 2013
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From: Anaheim CA
(That whole feature just screams "test hack" to me: something the test engineers put in for their own use during development and forgot to remove before the PCM/IPC firmware was locked down. They removed it in the C6/7 right? I'm curious whether anyone who has swapped to a later-model LS2/3/7 still has access to codes through the DIC. Doesn't that swap involve a new PCM?)
Thread Starter
Race Director
Joined: Mar 2006
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From: Everywhere and Nowhere at all
I am actually running a built LS2 based 414ci stroker... Did not have to change PCM's...
I put 25 mi on the car today.. I will drive the car tomorrow @ some point after work and try it again( the inspection that is).... I am confident that it will pass... Thanks again for everyone's feedback. Much appreciated.
I put 25 mi on the car today.. I will drive the car tomorrow @ some point after work and try it again( the inspection that is).... I am confident that it will pass... Thanks again for everyone's feedback. Much appreciated.Perhaps. The readout on my particular scanner refers to them as "tests" (as does the California emission test printout IIRC)...I suspect each involves multiple sensors and associated codes. In any case, the state of the readiness indicators are not codes, so there would be no reason to expect them to appear on the DIC code readout.
(That whole feature just screams "test hack" to me: something the test engineers put in for their own use during development and forgot to remove before the PCM/IPC firmware was locked down. They removed it in the C6/7 right? I'm curious whether anyone who has swapped to a later-model LS2/3/7 still has access to codes through the DIC. Doesn't that swap involve a new PCM?)
(That whole feature just screams "test hack" to me: something the test engineers put in for their own use during development and forgot to remove before the PCM/IPC firmware was locked down. They removed it in the C6/7 right? I'm curious whether anyone who has swapped to a later-model LS2/3/7 still has access to codes through the DIC. Doesn't that swap involve a new PCM?)