Fault code 17748 - Audi Forums
Audi Forum Audi Forum

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   Audi Forums > Audi Models > Audi A4, RS4 and S4 Forum > B6 Forum
Register Home Forums Active Topics Gallery / Showroom Auto Loans Garage Search Today's Posts Mark Forums Read Auto EscrowInsurance

B6 Forum 2002-2005 Audi A4 & Audi A4 Cabriolet / 2004 Audi S4. (Audi A4 Forum, Audi S4 Forum, Audi RS4 Forum)

Audi-Forums.com is the premier Audi Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 01-11-2013, 11:22 AM   #1 (permalink)
Newbie
 
Join Date: Dec 2009
Posts: 5
Gallery: (0)
acano is on a distinguished road
Question Fault code 17748

Ok where do I start? A4 2.0lt SE 2001 B6

My o2 sensor has been faulty for a while now to which I replaced the other day. Only thing is and i'm not sure if it matters, I replaced it with a second hand one from a car that had been in a rear end smash however the sensor was working fine prior to removal.

So now I have idle/running issues.
Hot or cold car runs very nicely when MAF is unplugged and very very roughly when plugged in (barely wants to start when cold).
Would suggest that the MAF is faulty Yes?

However the fault code coming up is 17748 - Camshaft Position Sensor (G40) / Engine Speed Sensor (G28): Incor. Correlation
P1340 - 001 - Upper Limit Exceeded

Timing marks are spot on Checked double checked and checked again!

So I run the car plugged in the VCDs run the measuring blocks but not sure what I'm looking at, perhaps someone can help explain
Attached Files
File Type: pdf LOG-01-001-002-003.pdf (252.3 KB, 54 views)

Last edited by acano; 01-12-2013 at 06:29 AM.
acano is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 01-12-2013, 01:26 PM   #2 (permalink)
Senior
 
mullardel34's Avatar
 
Join Date: Nov 2008
Location: Midwest US
Posts: 368
Gallery: (0)
mullardel34 is on a distinguished road
Default

The code refers to the ECU sensing the fact that your crankshaft and camshaft are out of time. The ECU says crankshaft and camshafts are out of timing alignment; the rough operation seems to confirm that the ECU is correct.
__________________
---Mullard EL34
* 2003 A4 3.0L Quattro (6-speed manual)
* sport package
* 18"x8" Moda MD5
* Continental ExtremeContact DWS (235/40ZR18)
mullardel34 is offline   Reply With Quote
Old 01-12-2013, 07:27 PM   #3 (permalink)
Newbie
 
Join Date: Dec 2009
Posts: 5
Gallery: (0)
acano is on a distinguished road
Default

Quote:
Originally Posted by mullardel34 View Post
The code refers to the ECU sensing the fact that your crankshaft and camshaft are out of time. The ECU says crankshaft and camshafts are out of timing alignment; the rough operation seems to confirm that the ECU is correct.
When you say rough operation does that suggest there is a timing issue that I have missed?
Or one of the two sensors has failed?

Thanks Tony
acano is offline   Reply With Quote
Old 01-16-2013, 08:38 AM   #4 (permalink)
Senior
 
mullardel34's Avatar
 
Join Date: Nov 2008
Location: Midwest US
Posts: 368
Gallery: (0)
mullardel34 is on a distinguished road
Default

No failed sensors; the engine timing is off. Did you have all of the required Audi-specific tools for setting the timing or did you just look at the timing marks? The timing procedure requires Audi-specific locking tools (which can be rented from multiple forum sponsors) to ensure proper timing alignment. If you just visually "eye-balled" the procedure, that's likely where the timing imprecision was introduced which is being noted by the ECU.
__________________
---Mullard EL34
* 2003 A4 3.0L Quattro (6-speed manual)
* sport package
* 18"x8" Moda MD5
* Continental ExtremeContact DWS (235/40ZR18)
mullardel34 is offline   Reply With Quote
Old 01-16-2013, 03:16 PM   #5 (permalink)
Newbie
 
Join Date: Dec 2009
Posts: 5
Gallery: (0)
acano is on a distinguished road
Default

Quote:
Originally Posted by mullardel34 View Post
No failed sensors; the engine timing is off. Did you have all of the required Audi-specific tools for setting the timing or did you just look at the timing marks? The timing procedure requires Audi-specific locking tools (which can be rented from multiple forum sponsors) to ensure proper timing alignment. If you just visually "eye-balled" the procedure, that's likely where the timing imprecision was introduced which is being noted by the ECU.
No just looked at the marks!
I sent the car to a local garage for a new timing belt and water pump. Got it back last night to which he stated timing had been out. All seemed Ok with car on homeward journey, however on start this morning it was a little rough on idle but balanced itself out within a few seconds. No fault codes showing but I think I'll run measuring blocks again and maybe someone can reassess the data?
acano is offline   Reply With Quote
Old 01-18-2013, 10:02 AM   #6 (permalink)
Newbie
 
Join Date: Dec 2009
Posts: 5
Gallery: (0)
acano is on a distinguished road
Default

Ok back from garage car still not running properly so put it back on computer and attached is the measuring block date hopefully someone can tell me what this means
As for special tools I hope he has and isnt wasting my money
Attached Files
File Type: pdf Fri 18th.pdf (48.5 KB, 65 views)
acano is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Audi Forums > Audi Models > Audi A4, RS4 and S4 Forum > B6 Forum


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 01:10 PM.




Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO 3.3.2