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Old 4th March 2010, 16:47   #1
NogginM5Beast
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OBD Not Ready Codes - Question

Hey guys,

Moved to DC this past weekend so this morning, I went to the DMV to get my car emissions inspected. Came out with two not ready codes and an overall FAIL, although the guys loved my car(go figure). Anyway, had a question about the particular not ready codes that were thrown.

1) Evaporative System. I've been getting a Peake E8 intermittently over the past year and got it/cleared it two days ago so I'm assuming it's because of this. Will doing the EPA drive cycle clear this, assuming the code doesn't come back between now and then?

2) Secondary air system. This is a complete surprise. I've never gotten any CELs, never had an AA(low secondary airflow) code thrown - in other words, nothing to indicate the infamous carbon buildup issue which ends up throwing this code. Can anything else result in this not-ready code being thrown? The only emissions codes i've ever had come up on the Peake(I check weekly) are the E8 and a random catalyst efficiency code which I last saw over a month ago and it hasn't come back. Any ideas on what else this could be or am I looking at CBU?

Car: 2002 beast, 85k. Runs great, has never thrown a CEL, new t-stat, no other codes apart from what's mentioned above.

Thanks!!
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Old 4th March 2010, 17:13   #2
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When codes are cleared all of the "readiness monitors" are cleared as well. You'll need to complete the drive cycle at which point the monitors should be set.

The "readiness monitors" showing "not ready" or "not complete" means that the DME has not yet observed the running characteristics of the car long enough in order to make sure that all of the _sensors_ are functioning properly. While the monitors are being set the system will not throw emissions-related codes or illuminate the CEL for emissions-related issues. When the monitors are set to "ready" or "complete" it means that the DME is now watching the operation of the emissions-related systems and will throw a code and CEL if something goes out of spec.

The point here was to keep someone from clearing codes immediately before an inspection in order to pass when there's something significantly wrong. The drive cycle gives the system enough time to properly identify a real problem.
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Old 4th March 2010, 17:29   #3
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Thanks, that makes sense. So just to clarify, when you do the cE(clear codes) function on the Peake, ALL the monitors are set to not ready? I cleared my codes last night - if that's the case, then that's my issue. I'll do the drive cycle test - hopefully this will make them appear ready. Also, in order to see the monitors, you have to get a regular OBD2 reader, right?
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Old 4th March 2010, 17:32   #4
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Does you CEL light work??? When you turn the key on and the dash lights come on, does the CEL also illuminate?

Sometimes people disable the CEL to sell a car.... a smog inspection is supposed to include a verification that the CEL is functional at initial turn on...

Just wondering....never heard of a secondary air 'ready code'..

A
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Old 4th March 2010, 17:34   #5
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Quote:
Originally Posted by NogginM5Beast View Post
Thanks, that makes sense. So just to clarify, when you do the cE(clear codes) function on the Peake, ALL the monitors are set to not ready? I cleared my codes last night - if that's the case, then that's my issue. I'll do the drive cycle test - hopefully this will make them appear ready. Also, in order to see the monitors, you have to get a regular OBD2 reader, right?
Yes. After clear, all ready monitors are reset. Precisely to prevent people from resetting codes the night before they drive to a smog!

GL

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Old 4th March 2010, 17:42   #6
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yup, cel works - it comes on when key is in position two. Great information, thank you both!
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Old 4th March 2010, 18:53   #7
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Quote:
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Just wondering....never heard of a secondary air 'ready code'..

A
OBDII defines readiness monitors (self tests) for a number of systems. Secondary Air (if equipped) is one of them.
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Old 4th March 2010, 20:57   #8
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Quote:
Originally Posted by ard View Post
Yes. After clear, all ready monitors are reset. Precisely to prevent people from resetting codes the night before they drive to a smog!
GL

A
Exactly, and I found out the hard way (reset the codes on my 318ti, the night before the test). I failed because of that, and I didn't know about the "drive cycle." So, I went out and drove it HARD, and still failed ... Didn't know about the drive cycle. Doug told me about the drive cycle, and I "drive cycled" my not ready codes away, and passed ... 300 miles later. Thanks, Doug ... again.
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