what is code P1155?

 

That ais the MAF

 

It came on and I cleared it?! Car seems to be running normally. I have stock air filter but recently put on cargaphics exhaust. I'll check MAF connections. I figured it would be an O2 code. Should I worry?

 

Not unless it comes back.

 

How did you clear it? I just had a CEL today for the first time as well. I have a similar setup. Stock ECU with a fabspeed loud.

How did you find out that it's a P1155?

 

Most auto parts stores have an O2 reader (like Autozone). They plug it into the port and can tell you the code.... YOu need a Porsche System 2 Tester to go beyond that point, but they can at least read the code and someone can tell you what the fault is (as Stephen did).
Evan

 

Autozone will read the codes for you. Any store will sell a generic OBDII reader. You don't need anything special to read SAE OBDII codes.

 

Evan,
Not Really. The Baum tool does about all the same functions. Still cost about 5K but I have been very pleased with it.

 

Hum...didn't realize that, coolio Stephen I use a PS2T...its really a great tool, amazing what you can do by plugging into that port!!!
Evan

 

I bought this http://www.ghg.net/dharrison/
Its cheap and connects to a laptop. I can read codes and many other things but P1155 is a Porsche specific code and requires the manual(which I recently sold!) to decode.
Thanks PhD

 

Evan, you're right in that the PST2 is really the ONLY way to go. I have had mine for a couple of years now with updated 17.0 for all cars through 2004. I got tired of waiting for Baum's Porsche software. The Baum unit is decent for what it is but is really not factory level. Can't code cont units, no drive links, only good to 2002, have to mess with changing the yellow and green wires for various applications etc. I believe it sells for about $4000 currently with the CS2000, cables and module. I think though i am going to trade my PST2 in for the new PST3 that is coming soon. It's supposed to be an even better unit and can be used up to 30 feet from the car without cables...Seth.

 

I believe your P1155 should be a MAP sensor code rather than MAF- usually the maf codes are Porsche proprietary code 115 or P102,103- it is a Twin Turbo, correct? Should be Map sensor with short to B+. You might want to check the MAP sensor (before the throttle body. If the code comes back it may need to be pinned out to the ECU connector. It is possible that it was an erroneous code- they do happen occasionally. Post back if it continues to give you trouble. Seth

 

Porsche Tech,
Not sure when the last time you looked at the Baum tool. I have had my software for about a year and the pin outs are only for the odd ball stuff. Like a 95 993 with OBDII ports and a OBDI system. There is a multiplex box that comes with the system that simply plugs in and switches as it needs to. You may not be able to code boxes, however most of the other features are in place. Things like activating ABS, injectors IAC, etc etc. The unit also works on the 04 stuff. I have done several new TTs and not had a problem. You might want to give Skip a call back. They have it as we looked into buying several units for resale. As far as ECU coding, that's a tator by other means.

Also FWIW I have never seen a MAP go bad in one of these cars nor an issue with B+. When I get back to the office I will relook the code back up. My point is it is more likely that you had a glitch or the code was misread if in deed the code is for the MAP. You might try looking at the plug. It simply pushes in the unit with two self clips on the plug. It is the sensor just foward the throttle body attached by a 6mm (10 wrench size) bolt with a black plug on it.

 

As far as the Baum tool is concerned, The price has come down quite a bit i immagine since you purchased yours. It runs about $3700 now. Since i use the PST2 i have had no reason to purchase it but as for application, my main point was that it IS a decent tool, It just doesn't do all that the factory tool does. Can't code control units or new door/ignition keys. Short test is not available either to run a simulated emissions function test by component. For the price you cant really go wrong seeing as the PST2 (now only the PST3) costs $7000-$8000, i paid $7500 for mine.

 

In Porsche's POSES system, factory info skips P1155- in sae info though , i see this code as a MAP sensor code, but unlikely the sensor itself. I also have not yet seen one go bad on any 996 TT's but the code information points to a wiring fault with a short to battery positive. When i said a pin out may be neccesary, i mean using a factory break out box and checking voltage, ground, continuity for that circuit. I wouldn't say performing pins outs are not entirely for odd ball stuf. Shorts to B+ are not impossible- i have seen and repaired them on other 996 systems, abs ecu no communication, throttle position faults- Situations where a wire has rubbed through or broken, have seen pins come out of connectors etc.
I would agree though that the code may have been read out incorrectly or written down wrong but i have seen this code before on the Audi S4 2.7TT(same Bosch motronics), car had been in an accident and had a pinched wire. Odds are its just a glitch though.Seth