Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Engine check light on after service - thanks for your help


Recommended Posts

Hi,

Today I tackled my first DIY service on a 2006 c2.

After the service the engine check light turned on, any help would be great!!! Here is exactly what I did:

- I wanted to check the spark plugs so removed 2 coils and 2 sp, I put them back on as they were clean. I plugged the coils back on, screwed them back on.
- changed oil and filter.
- change air filter, cleaned the Maf carefully with Maf cleaner without touching any component
- cleaned the inside of the throttle body as it was somewhat dirty. Dried it completely before putting it back on and changed the seal. Note that when I cleaned it I moved the internal part to clean thoroughly.
- topped off coolant

Thank you for your thoughts and tips!!!

Edited by jmaier
Link to comment
Share on other sites

  • Replies 50
  • Created
  • Last Reply

Top Posters In This Topic

I found out the code p2102. Explanation is "throttle actuator control motor circuit low". Probable cause is poor electrical connection or failed throttle actuator control motor.

I did remove the throttle body, cleaned it and moved the internal round part to clean thoroughly. Could I have wrecked the electrical motor by doing so? I triple checked the connector and it looks good, fits tight...

Thank you!!

Link to comment
Share on other sites

I found out the code p2102. Explanation is "throttle actuator control motor circuit low". Probable cause is poor electrical connection or failed throttle actuator control motor.

I did remove the throttle body, cleaned it and moved the internal round part to clean thoroughly. Could I have wrecked the electrical motor by doing so? I triple checked the connector and it looks good, fits tight...

Thank you!!

Have you tried resetting it and see if it comes back? Like Mijo said, the code may clear itself later if no more fault is detected. I doubt you damaged anything unless you were really rough handling it, which I can't imagine.

Link to comment
Share on other sites

Hi,

THank you for your suggestions, how do I reset the CEL light?

A few new elements: last night the cel light did not come on but this morning it came back. In addition, the idle is very rough so I tried on idle to disconnect the MAF sensor and then the idle was much smoother (CEL light still on with code mentioned above P2102, throttle body).

What I your thoughts, did I mess up the MAF? What about this code then?

Link to comment
Share on other sites

maybe you confused the TB flap a little when you cleaned it? anyway, try "resetting" it by turning key to ignition but do not start (i.e. just keep foot off clutch when doing this) and let it stay there for a minute. hopefully you'll hear all sorts of things/sensors/actuators going thru their checking and resetting motions, etc. you may or may not want to disconnect/reconnect battery before trying it. can't hurt.

as far as resetting the code itself, you prob need a durametric for that. but i dont think that code will harm anything by not clearing it, as long as you fix the issue that keeps causing it.

Link to comment
Share on other sites

spiffyjiff, thank you! I read the following procedure to reset a throttle body, is anyone aware of it, does it work:


Turn ignition to on (switch position 1) for 60 seconds then off (switch position 3) for 5 seconds then back to switch position 1 (ignition on) for 15 seconds - during process you do not turn the switch to position 2 (start engine). After the last 15 second step key is returned to position 3. Here are the starter switch position steps: 1-3-1-3.

Link to comment
Share on other sites

  • Moderators

I found out the code p2102. Explanation is "throttle actuator control motor circuit low". Probable cause is poor electrical connection or failed throttle actuator control motor.

I did remove the throttle body, cleaned it and moved the internal round part to clean thoroughly. Could I have wrecked the electrical motor by doing so? I triple checked the connector and it looks good, fits tight...

Thank you!!

That is an odd code number, what type of scanner was used to obtain it?

Link to comment
Share on other sites

  • Moderators

I went to autozone to get this code. I do not have a durametric yet!

When you have access to the Durametric system, or another Porsche specific diagnostic system, recheck the code. We have been seeing more misdiagnosis of late due to strange codes from "Global" OBD II scanners.

Link to comment
Share on other sites

  • Moderators

I might be a bit slow but I'm trying to figure out whether there is an ICV in a 997.1? I can see it on the 996 engine but it seems that on the 997 the TB design and ICV is very different. I'm trying to prepare my todo list for the weekend :-)

The reason you can't find it is that your car does not have one. On the later E-gas cars, which yours is one, the idle is controlled by the DME using the throttle servo motor to open or close the throttle blade slightly to control the idle. Earlier cars had a separate valve that performed this function.

Link to comment
Share on other sites

So I spend time cleaning the maf again, I also double checked all connections to the body throttle, even cleaned the connectors with electronic cleaner. I unplugged the battery which reset the error code (I still don't have the durametric so I cannot confirm that the code was BT).

After doing so I started the car, went for a 30 minute drive (spirited) and the car ran perfectly. No error code, idle was smooth.

On Sunday I start the car, error code comes back on right away (I assume it's still p2102 but will validate as soon as the durametric is here) and IDLE is again choppy. When cold it's pretty bad then it get's better (quite perfect actually) then it gets bad again when hot. When it's bad rpm surges to 1500 and almost stalls.

If I disconnect the MAF the IDLE is better.

Any thought on what next step I should take?

Link to comment
Share on other sites

Hi, so I received my durametric and have much info!

The car still idles very badly, especially when cold or after a spirited drive.

I have the following fault codes:

P1095: Air mass ahead of throttle valve

P2187 and P2189: o2 sensor adapt RKAT bank (1&2) range near idle: in this case limit exceeded

I have then again both P2187 and P2189 but with the message open circuit

In All cases I'm noticing the following:

STFT: +25 both banks

LTFT: -3 both banks

Any thoughts, ideas? Thank you all!!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.