CEL: P1248 Help!

grtn316

Veteran Member
Joined
Jul 9, 2007
Location
Midland, Tx
TDI
01 Beetle
CEL: P1248
Injection Start Control Deviation

I'm new to these cars/motors so the more info the better. I cannot find a definite answer on what the problem is/what I need to fix.

I just got this car yeterday so I'm not really sure how a good running beetle should perform. It starts good, kinda loud...not quite as loud as a diesel truck though. Seems like there may be a little power loss in the higher rpms. This may all be normal...I'm just shooting out information.

Also, when I was driving the car home yeterday I saw the CEL on but it was VERY dim. Today the light is gone. Went to Autozone today and got the code above. I'm kinda thinking that the light was tampered with so that the car would appear in good condition but I'm unsure. Anyone heard of this before?

David
 

2004STARWARSTDI

Top Post Dawg
Joined
Oct 19, 2004
Location
LAKELAND, FL
TDI
2004 Platinum Gray GLS Jetta / 2006 Silver Jetta with DSG
P1248

http://forums.tdiclub.com/17656/P1248/004680

From Ross-Tech Wiki


Contents

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17656/P1248/004680 - Start of Injection Timing Regulation: Control Deviation

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Possible Symptoms

  • Loss of Power at high Engine Speeds
  • Engine difficult to Start
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Possible Causes

  • Start of Injection Timing Regulation not OK
  • Injection Pump Control Range blocked/dirty (e.g. by Metal Particles)
  • Engine has stalled / ran out of Fuel recently
  • Wiring/Connectors from/to Injection Valve (N108) faulty
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Possible Solutions

  • Check/Adjust Injection Start
  • Check Fuel Supply
  • Check/Replace Fuse(s)
  • Check/Repair Wiring/Connectors from/to Injection Valve (N108)
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Special Notes

Retrieved from "http://wiki.ross-tech.com/index.php/17656/P1248/004680"
Categories: Fault Codes




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oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
Please do yourself a favor and quit taking the car to Autozone for their generic scan tool's uselessness.

You need to get a GOOD Volkswagen-specific scantool. Ross-tech's VAG-COM is an excellent one that works on any PC.
 

grtn316

Veteran Member
Joined
Jul 9, 2007
Location
Midland, Tx
TDI
01 Beetle
oilhammer said:
Please do yourself a favor and quit taking the car to Autozone for their generic scan tool's uselessness.

You need to get a GOOD Volkswagen-specific scantool. Ross-tech's VAG-COM is an excellent one that works on any PC.
I'm thinking about it but...what benefit does this tool have over autozones? I got the correct code and theres plenty of information on this website to reference it...so what makes it so much better (serious question...debating on buying it).

Also, can I adjust my injection timing with this software or am I confused?

David
 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
Generic scan tools often to not retrieve ALL the stored DTCs. On any make of car, not just Volkswagens. There may be 3 or 4 more DTCs stored, and when looked at together may reveal clues as to the true nature of the problem.

I work on cars for a living, and have seen and used all kinds of scan tools on all kinds of cars. The generic ones just are not that great. They miss things, and are very limited on overall capabilities. Try asking Autozone to access any one of the other 10+ modules in your car!

The VAG-COM works just as well, in some cases actually better [easier] than the official VAG scan tools that the dealers use. In fact some dealer techs even use the VAG-COM! It will do far more than anything any generic scan tool can do, and it is not all that expensive.

Autozone and places like them cause so much stupid problems with half-assed "code reading" for DIY's and all they are really concerned about is selling you a bunch of parts. :rolleyes:

And yes, you can use the VAG-COM software to check and adjust your injection timing.
 

grtn316

Veteran Member
Joined
Jul 9, 2007
Location
Midland, Tx
TDI
01 Beetle
Anyone know where this vacuum line goes? Maybe the source of my problem...





Anyone know why this would be replaced?

 

oilhammer

Certified Volkswagen Nut & Vendor
Joined
Dec 11, 2001
Location
outside St Louis, MO
TDI
There are just too many to list....
That might be the vacuum vent to the air cleaner, which will not cause any driveability problems. There is a vac diagram on a sticker under the hood of the car.
 

grtn316

Veteran Member
Joined
Jul 9, 2007
Location
Midland, Tx
TDI
01 Beetle
oilhammer said:
That might be the vacuum vent to the air cleaner, which will not cause any driveability problems. There is a vac diagram on a sticker under the hood of the car.
My sticker isn't there.

David
 
Last edited:

Dave_D

Veteran Member
Joined
Jun 9, 2003
Location
Gaithersburg, MD, USA
TDI
2015 Passat Titanium Beige six speed manual & Jetta, 1999.5, Tornado Red
grtn316 said:
I'm thinking about it but...what benefit does this tool have over autozones? I got the correct code and theres plenty of information on this website to reference it...so what makes it so much better (serious question...debating on buying it).

Also, can I adjust my injection timing with this software or am I confused?

David
To the best of my knowledge only VAG specific software can reach the other controllers, such as the airbag and ABS controllers. I found this out when a airbag light came on shortly after I bought my Jetta and a generic OBD saw no problems and could not reset it. I purchased a cable from lubrication specialist and downloaded the shareware VAG COM to work with it. This enabled me to read and clear codes on all controllers in the car.

I should note that this cable is not compatible with the newest cars that use the CAN bus, so this option may not be available to you if you have an A5 or a B6 vehicle.
 

scurvy

Good Ol' Boy
Joined
Feb 21, 2006
Location
Chicago IL USA
TDI
2006 Golf
Bumping this thread from the dead, in the hopes that it helps someone else out. Our NB had the same code & problem last year. VCDS said '17656 - Injection Start Regulation: Control Deviation P1248 - 35-10 - - - Intermittent', the car was smokey, noisy & down on power. Timing in VCDS was pegged full advance (255) and statically retarding the timing gained a bit of power back.

Pulled the pump and sent it to DFIS, who corroborated my guess that the advance solenoid was broken & wedged full advance. One rebuild later, the pump was back in (and after figuring out the flywheel had two TDC marks) it fired up and has worked perfectly since.
 

rwtags

Veteran Member
Joined
Feb 1, 2010
Location
new york
TDI
VW 2000 Beetle
oilhammer said:
That might be the vacuum vent to the air cleaner, which will not cause any driveability problems. There is a vac diagram on a sticker under the hood of the car.
That is indeed the one that goes to the bottom of the air box, with the filter in it, i would suggest replacing all the vaccuum lines with silicon cables, i think they are 3mm and either 2 or 4 mm widths.
 
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