OBDII Readiness for CTT

[OCNYPORSCHE]

Hello,

I recently bought a certified 2005 Cayenne Turbo. It is awesome.

I bought it out of state, and now getting a NY inspection, the secondary air and EVAP systems are still not ready, indicating not complete. I found out the hard way by failing inspection. This whole week I have been trying to get those 2 to become complete. From what I read and searched, both the secondary air and EVAP get set during a cold idle. But I think I tried all scenarios; I tried the BMW, Audi, and VW protocols that all vary in time from 5-15 mins of idle. But still, they are not setting.

Can someone help? Can anyone share the Porsche OBDII manual pages for setting these 2?

Thanks so much!

[Loren]

If you have no CEL and no fault codes the "Ready" state will change when there are enough drive cycles. We suspect they do this so that you can cheat on smog tests.

You just need to drive the car for a week or so until it passes the Ready test.

[OCNYPORSCHE]

If you have no CEL and no fault codes the "Ready" state will change when there are enough drive cycles. We suspect they do this so that you can cheat on smog tests.

You just need to drive the car for a week or so until it passes the Ready test.

Hi Loren,

Thanks for the quick response. I have driven it for about 10 days, and about 800 miles. I have even tried some of idle, and 20-30 MPH stuff for minutes etc. Do you know if you post the exact OBDII procedure for the Cayenne Turbo? I looked in the OBDII codes section of the site, but I do not think that the readiness procedure is there.

I am scared that I will not be able to use the car since my failure is only given about 7 days to fix the issue.

Thanks!

[Loren]

As far as I know there is no documentation of exactly what conditions need to be met for Ready.

I suspect it is based on what what the prior fault(s) were.

Have you checked to see that you have no fault codes and no pending fault codes?

[OCNYPORSCHE]

As far as I know there is no documentation of exactly what conditions need to be met for Ready.

I suspect it is based on what what the prior fault(s) were.

Have you checked to see that you have no fault codes and no pending fault codes?

I just put both a cheap scanner, and then Durametric and both show not fault codes. I am not sure where the pending ones would be shown, but both have no current codes. As for the prior faults, I am not sure since I just bought it from the dealer.

I read another post that indicated that the OBDII porsche manual would have the readiness info. I think the post indicated that the info was not in the service manual and that Porsche actually faxed the user the 2 pages. Here is the post: Here is the post

Edited December 13, 2008 by OCNYPORSCHE

[Loren]

"Ready status

The "Ready Status" menu item inidicates whether the OBD system has performed the required fault checks since the last time the 'fault memory was erased' or 'reset'. If a check proves to be OK, the oneoff check is sufficient for a Ready status; if the system is faulty, the Ready status is achieved after a second check.

This is important, for example, for Inspection and Maintenance; this is where it is possible to detect whether the fault memory of a faulty vehicle was erased before the examination, without the cause(s) of the fault having been remedied.

The ready status is displayed for the following sub-systems:

- Oxygen sensor heater

- Oxygen sensor

- Secondary-air system

- Fuel tank ventilation system

- Cat. conv. efficiency

Once the Ready status has been reached for a sub-system, this is stored until the next time the "fault memory is erased".

Note: in some countries (currently: USA, Canada), it is necessary to restore the Ready status following manipulation of the DME before the vehicle is supplied to the customer.

- To do this, you must perform the short test available in the 9588 Porsche System Tester ll or a test drive to achieve the relevant diagnostic conditions (these are listed for each system at the beginning of the test instructions for P codes in this manual)."

The dealer should have done this before he delivered the vehicle.

[OCNYPORSCHE]

"Ready status

The "Ready Status" menu item inidicates whether the OBD system has performed the required fault checks since the last time the 'fault memory was erased' or 'reset'. If a check proves to be OK, the oneoff check is sufficient for a Ready status; if the system is faulty, the Ready status is achieved after a second check.

This is important, for example, for Inspection and Maintenance; this is where it is possible to detect whether the fault memory of a faulty vehicle was erased before the examination, without the cause(s) of the fault having been remedied.

The ready status is displayed for the following sub-systems:

- Oxygen sensor heater

- Oxygen sensor

- Secondary-air system

- Fuel tank ventilation system

- Cat. conv. efficiency

Once the Ready status has been reached for a sub-system, this is stored until the next time the "fault memory is erased".

Note: in some countries (currently: USA, Canada), it is necessary to restore the Ready status following manipulation of the DME before the vehicle is supplied to the customer.

- To do this, you must perform the short test available in the 9588 Porsche System Tester ll or a test drive to achieve the relevant diagnostic conditions (these are listed for each system at the beginning of the test instructions for P codes in this manual)."

The dealer should have done this before he delivered the vehicle.

Thank Loren. You are right, the Porsche dealer should have done this. I bought from a Porsche dealer about 75 miles from me in CT. Since I was going to register it in NY, I guess they did not both getting it inspected in CT. But they should have still gotten all system into Ready status.

From the text that you posted, it says that: (these are listed for each system at the beginning of the test instructions for P codes in this manual). Can you post the test drive info for the secondary air and EVAP systems?

[Loren]

Basically it is engine at operating conditions (i.e. warmed up).

Secondary Air

Diagnostic conditions

- Battery positive voltage between 10 V and 16 V

- Time after engine starts > 1 second

EVAP

Diagnostic conditions – V8

- Battery positive voltage between 10 V and 16 V

- Time after engine starts > 11 minutes and 30 seconds

- Idle speed

- All oxygen sensors ready for operation

- No oxygen sensor fault stored

- No tank vent driver fault stored

[OCNYPORSCHE]

Basically it is engine at operating conditions (i.e. warmed up).

Secondary Air

Diagnostic conditions

- Battery positive voltage between 10 V and 16 V

- Time after engine starts > 1 second

EVAP

Diagnostic conditions – V8

- Battery positive voltage between 10 V and 16 V

- Time after engine starts > 11 minutes and 30 seconds

- Idle speed

- All oxygen sensors ready for operation

- No oxygen sensor fault stored

- No tank vent driver fault stored

Thanks Loren!

[mudman2]

Battery maybe ?

Basically it is engine at operating conditions (i.e. warmed up).

Secondary Air

Diagnostic conditions

- Battery positive voltage between 10 V and 16 V

- Time after engine starts > 1 second

EVAP

Diagnostic conditions – V8

- Battery positive voltage between 10 V and 16 V

- Time after engine starts > 11 minutes and 30 seconds

- Idle speed

- All oxygen sensors ready for operation

- No oxygen sensor fault stored

- No tank vent driver fault stored

Thanks Loren!

[OCNYPORSCHE]

Just wanted to let all know that I got it to pass inspection. After driving it for about another 300 miles (a total of 1000 miles), the EVAP was finally complete. In that last 300 miles, I did get stuck in some bumper to bumper traffic, and the temp was in the 60s. Previously, the outside air temperature was <40. Not sure if this will help anyone else, but it worked for me.

NY allows 1 to be not complete, so it finally passed.

Thanks all

[Zuffenhausen955]

Does a "pending P0421 DTC " prevent from setting evap, SAI and catalyst monitors? I have driven 1000 miles and the three pesky I/M readiness monitors still has not set!