Notices
993 Turbo Forum 1995-1998

Check Engine:OBDII Code "121 Load Detection"

Thread Tools
 
Search this Thread
 
Old Aug 2, 2006 | 02:01 PM
  #1  
DM993tt's Avatar
DM993tt
Thread Starter
Three Wheelin'
15 Year Member
 
Joined: May 2006
Posts: 1,439
Likes: 13
Default Check Engine:OBDII Code "121 Load Detection"

Anyone had this come up when the check engine light is on? More importantly, does anyone know what causes it and most importantly the best way to fix things so it doesn't show back up?
Reply
Old Aug 2, 2006 | 05:32 PM
  #2  
Janina993's Avatar
Janina993
Advanced
 
Joined: Sep 2005
Posts: 98
Likes: 0
From: Finland
Default

Hi,

unfortunately I can't help you with this issue (yet).

What program and OBD tool do you use for read fault codes??

I have OBD-DIAG 4000 tool which support 11 different protocols, but I haven't found working program yet.

I really would like to open heart of my tt
Reply
Old Aug 2, 2006 | 06:31 PM
  #3  
viperbob's Avatar
viperbob
Former Vendor
 
Joined: May 2002
Posts: 6,849
Likes: 0
From: Tampa
Default

That is not a proper OBD2 code. What mods do you have done to your car?? It looks like Fabspeed bypasses.

The load error is generally caused by a number of factors in the car looking at different inputs and not seeing corresponding values on the other sensors. Some possible causes are a bad MAF (input signal does not correspond then to the throttle position sensor, and other stuff), too much HP (when you get too much HP in these cars the ECU has set parameters of values that if they are outside the range will causes error codes) and other things. You need a more definitive code though that is a true OBD2 value....
Reply
Old Aug 2, 2006 | 08:12 PM
  #4  
IamSMC's Avatar
IamSMC
Rennlist Member
 
Joined: May 2004
Posts: 3,685
Likes: 3
Default

Originally Posted by viperbob
That is not a proper OBD2 code. What mods do you have done to your car?? It looks like Fabspeed bypasses.

The load error is generally caused by a number of factors in the car looking at different inputs and not seeing corresponding values on the other sensors. Some possible causes are a bad MAF (input signal does not correspond then to the throttle position sensor, and other stuff), too much HP (when you get too much HP in these cars the ECU has set parameters of values that if they are outside the range will causes error codes) and other things. You need a more definitive code though that is a true OBD2 value....
viperbob: You're not suggesting that the bypasses are the possible cause of the load error?
Reply
Old Aug 2, 2006 | 08:31 PM
  #5  
Kevin's Avatar
Kevin
Addict
Rennlist Member


Rennlist
Site Sponsor

20 Year Member
 
Joined: Jun 2001
Posts: 9,386
Likes: 409
From: Gulf of America-Pacific NW
Default

What are your wastegates set at? Did they get jacked up.. How much boost are you seeing on a real gauge?
Reply
Old Aug 3, 2006 | 02:08 AM
  #6  
jrgordonsenior's Avatar
jrgordonsenior
Nordschleife Master
20 Year Member
 
Joined: Oct 2004
Posts: 7,306
Likes: 10
From: Vacuuming Cal Speedway
Default

Bob I'm surpried you didn't recogonize one of your own children. You probably put those bi-passes on that car.....
Reply
Old Aug 3, 2006 | 01:27 PM
  #7  
viperbob's Avatar
viperbob
Former Vendor
 
Joined: May 2002
Posts: 6,849
Likes: 0
From: Tampa
Default

The bypasses by themselves will not cause any issues. A car that has them may have more mods that could be a cause of the problem..
Reply
Old Aug 3, 2006 | 06:24 PM
  #8  
IamSMC's Avatar
IamSMC
Rennlist Member
 
Joined: May 2004
Posts: 3,685
Likes: 3
Default

Originally Posted by viperbob
The bypasses by themselves will not cause any issues. A car that has them may have more mods that could be a cause of the problem..
thanks for the clarification
Reply
Rennlist Stories

The Best Porsche Posts for Porsche Enthusiasts

story-0

9 Vehicles Porsche Helped Engineer that Aren't Porsches

 Verdad Gallardo
story-1

9 Features and Characteristics That Only Porsche People Understand

 Verdad Gallardo
story-2

I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way

 Joe Kucinski
story-3

10 Most Unnecessary Porsches Ever Built (And Why We Love Them)

 Verdad Gallardo
story-4

Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner

 Joe Kucinski
story-5

This Builder Is Turning Heads With Its Slantnose 911 Creation

 Verdad Gallardo
story-6

Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

 Verdad Gallardo
story-7

Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

 Verdad Gallardo
story-8

10 Porsche Colors That Have More Personality Than Most People

 Verdad Gallardo
story-9

Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

 Verdad Gallardo
Old Aug 4, 2006 | 10:37 AM
  #9  
DM993tt's Avatar
DM993tt
Thread Starter
Three Wheelin'
15 Year Member
 
Joined: May 2006
Posts: 1,439
Likes: 13
Default

No more mods other than what JRG did prior to my ownership. I did have had Joel Reiser do his breather re-work tho. I have ym OBDII scan tool now and I am going to try a little cleaner on the MAF this weekend. If that doesn't do it I'm going to replace the MAF. And if that doesn't work I'm going to be at a loss for new ideas.
Reply
Old Jan 19, 2024 | 09:22 AM
  #10  
Gdjsk's Avatar
Gdjsk
Instructor
 
Joined: Jan 2023
Posts: 131
Likes: 6
Default

Hello,
did you solve this fault code 121, I am having same fault code now for a long time
Thankyou
Reply




All times are GMT -3. The time now is 10:53 AM.

story-0
9 Vehicles Porsche Helped Engineer that Aren't Porsches

Slideshow: Long before engineering consulting became trendy, Porsche was quietly helping other automakers build everything from supercars to economy hatchbacks.

By Verdad Gallardo | 2026-05-15 12:44:44


VIEW MORE
story-1
9 Features and Characteristics That Only Porsche People Understand

Slideshow: Some brands build cars. Porsche builds traditions, obsessions, and a few habits that stopped making sense decades ago but somehow became part of the charm.

By Verdad Gallardo | 2026-05-13 18:46:13


VIEW MORE
story-2
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way

Slideshow: Six years and 500 Rennlist articles later, these are the biggest changes at Porsche.

By Joe Kucinski | 2026-05-11 09:52:55


VIEW MORE
story-3
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)

Slideshow: Some Porsches exist for very specific reasons-others feel like they were built just to see if anyone would notice.

By Verdad Gallardo | 2026-05-06 18:00:32


VIEW MORE
story-4
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner

Slideshow: Choosing between the 911 GT3 S/C and 718 Spyder RS in 10 key categories to determine one surprising winner.

By Joe Kucinski | 2026-05-05 12:51:46


VIEW MORE
story-5
This Builder Is Turning Heads With Its Slantnose 911 Creation

Slideshow: A small Polish tuner has reimagined the Porsche 911 Slantnose for the modern era, blending 1980s nostalgia with widebody tuning culture and serious performance upgrades.

By Verdad Gallardo | 2026-05-01 10:49:43


VIEW MORE
story-6
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture

Slideshow: Porsche has created a Japan-only 911 GT3 Artisan Edition that blends track-ready hardware with design cues inspired by traditional Japanese craftsmanship.

By Verdad Gallardo | 2026-04-28 19:37:40


VIEW MORE
story-7
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

Slideshow: Porsche's latest electric Cayenne Coupe blends dramatic styling with supercar acceleration, turning the brand's midsize SUV into a 1,139-horsepower flagship.

By Verdad Gallardo | 2026-04-27 19:39:30


VIEW MORE
story-8
10 Porsche Colors That Have More Personality Than Most People

Slideshow: Porsche's wildest paint colors aren't just shades-they're full-blown personalities on four wheels.

By Verdad Gallardo | 2026-04-27 19:38:13


VIEW MORE
story-9
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

Slideshow: The last of the Speedsters doesn't just close a chapter, it makes quite the bold, air-cooled statement.

By Verdad Gallardo | 2026-04-22 17:55:04


VIEW MORE