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OBD2 Reader

richardch

By richardch
in 996 TT, 996 TT S, 996 GT2

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richardch Member

richardch

Posted
Posted

Does anybody know where I can get an OBD2 reader at a reasonable price to establish why I keep getting a CEL on my Supersprint Techart exhaust, is there any quick fix for this, every time I disconnect the battery to reset it comes back in about 3 weeks. Originally it seemed to be because one of the sensors was not fully tight but now they all are and I'm just :eek: confused

Guest

Guest

Posted
Posted

You can get a cheap one from Harbor frieght tools for about 30 bucks. It will read and clear codes. It does not give you the meaning of the code, but you can look those up in the book they come with or on this site. I have one and it is great for clearing and checking with very little expense.

richardch Member

richardch

Posted
  • Author
Posted
You can get a cheap one from Harbor frieght tools for about 30 bucks. It will read and clear codes. It does not give you the meaning of the code, but you can look those up in the book they come with or on this site. I have one and it is great for clearing and checking with very little expense.

TVM, and where is the OBD2 Port in a 996 TT please ?

boli 996 Member

boli 996

Posted
Posted

Anyone that knows if it's possible to use another software together with TRIPLE COMBO network gateway from http://www.obd-2.com.

The software should be more adapt for Porsche 996 such as the one from Durametric Software.

  • Admin
Loren Member

Loren

Posted
  • Admin
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Anyone that knows if it's possible to use another software together with TRIPLE COMBO network gateway from http://www.obd-2.com.

The software should be more adapt for Porsche 996 such as the one from Durametric Software.

The two softwares are different. The Durametric is for resetting (all types of) codes and reading actual values from several controllers.

The OBD-2.com software is more of a DME/Oxygen sensor performance monitoring software. You can graph O2 sensor performance, TRA, FRA, spark advance, etc., etc.

I have both as they compliment each other (IMHO).

richardch Member

richardch

Posted
  • Author
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That software is reviewed here.

That software is reviewed here.

Ok my Official Porsche Service centre notes I have codes P 1130 / P 1128 due to my techart /supersprint exhaust and they will come back , every thing else is mega fine. what can I do to PERMAENTLY overide these Loren ?

  • Admin
Loren Member

Loren

Posted
  • Admin
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Ok my Official Porsche Service centre notes I have codes P 1130 / P 1128 due to my techart /supersprint exhaust and they will come back , every thing else is mega fine. what can I do to PERMAENTLY overide these Loren ?
They can't be overridden to my knowledge - besides your car would never pass any smog test.

P1128 Oxygen Sensing Adaptation, Idle Range, Bank 1 - Below Limit

P1130 Oxygen Sensing Adaptation, Idle Range, Bank 2 - Below Limit

Since both side of the engine are reporting it -- what that tells me is that you have one more of the following:

- an air leak somewhere in the intake system

- a bad or dirty MAF

- a bad or sticking EVAP purge valve

richardch Member

richardch

Posted
  • Author
Posted
P1128 Oxygen Sensing Adaptation, Idle Range, Bank 1 - Below Limit

P1130 Oxygen Sensing Adaptation, Idle Range, Bank 2 - Below Limit

Since both side of the engine are reporting it -- what that tells me is that you have one more of the following:

- an air leak somewhere in the intake system

- a bad or dirty MAF

- a bad or sticking EVAP purge valve

Thks Loren, where and what is my EVAP purge valve, is this something to do with the DV's ?

Is it easy to access re sticking or replace ?

  • Admin
Loren Member

Loren

Posted
  • Admin
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I suggest you find someone with a PST2 (or PIWIS) tester so that you can see what your MAF and TRA/FRA are doing and determine of you have an intake leak or a bad MAF. A PST2 can also test your EVAP purge valve.

Fuel vapors are collected in the EVAP canister. As the EVAP canister can only accommodate a certain amount of fuel vapors, the fuel vapors must be taken in and combusted during driving.

For this to occur, the EVAP canister purge valve opens. Due to the vacuum predominating in the intake manifold, air is sucked up via the purge air line through the EVAP canister. The air sucked up in this way draws the collected fuel vapors with it.

Most of the time when you have a bad EVAP purge valve it also fails the startup test - which gives another fault code also.

richardch Member

richardch

Posted
  • Author
Posted

:huh:

I suggest you find someone with a PST2 (or PIWIS) tester so that you can see what your MAF and TRA/FRA are doing and determine of you have an intake leak or a bad MAF. A PST2 can also test your EVAP purge valve.

Fuel vapors are collected in the EVAP canister. As the EVAP canister can only accommodate a certain amount of fuel vapors, the fuel vapors must be taken in and combusted during driving.

For this to occur, the EVAP canister purge valve opens. Due to the vacuum predominating in the intake manifold, air is sucked up via the purge air line through the EVAP canister. The air sucked up in this way draws the collected fuel vapors with it.

Most of the time when you have a bad EVAP purge valve it also fails the startup test - which gives another fault code also.

___________________________________________________________

Loren Car runs very smoothly at all engine revs including idle but the battery is near the end of its

lifespan. What I do notice when driving around town is that there is a very small lag in accelerator

take up at low speeds but I have attributed this to the fact that I have started Left foot braking and having

both feet on the pedals at the same time creating this.

:drive:

  • Admin
Loren Member

Loren

Posted
  • Admin
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Well, I can disconnect the MAF on my car and the car runs pretty much okay - short term. I still recommend that you find the source of the codes or at lest reset them and see if they come back.

richardch Member

richardch

Posted
  • Author
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Well, I can disconnect the MAF on my car and the car runs pretty much okay - short term. I still recommend that you find the source of the codes or at lest reset them and see if they come back.

thks Loren if it occurs again (likely) I will first try cleaning the MAF, the engine light usually comes on at the end of a drive when the car is idling before parking ( ie waiting for the auto garage door to open )

  • 2 weeks later...
richardch Member

richardch

Posted
  • Author
Posted

Hello Loren,

Have now cleaned the MAF put OEM air filter back in and still have a small "misfire" when accelerating hard from rest, does this draw anymore thoughts ?

  • Admin
Loren Member

Loren

Posted
  • Admin
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Hello Loren,

Have now cleaned the MAF put OEM air filter back in and still have a small "misfire" when accelerating hard from rest, does this draw anymore thoughts ?

Any codes?

Did you disconnect the battery for 5 minutes so the DME can re-learn the intake volume/pressures?

richardch Member

richardch

Posted
  • Author
Posted

Have now cleaned the MAF put OEM air filter back in and still have a small "misfire" when accelerating hard from rest, does this draw anymore thoughts ?

Any codes?

Did you disconnect the battery for 5 minutes so the DME can re-learn the intake volume/pressures?

Yep did both of those, no codes as yet but am sure that same ones will reappear by next weekend when car is warmed up and on idle stuck at a light or the garage door

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