Getting both lights, saying "PSM and ABS Failure".

However, no codes exist! disconnected battery, no luck - still gettting PSM/ABS failure. Tripled checked, no codes being thrown?

runs perfect, no issues.

what is the deal?

2002 996 TT

 

check your maf try to put any other maf and check if the problem still
thats mean
ABS Sensors And Streering angle Sensors
i Had the Same problem from 2 months ago
And Try
Thats What can i help you

Best Regards
Abdullah

 

if it was an accidental psm/abs and you disconnected the battery...when you get back in and start the car it may not clear the psm/abs until you start driving...if you just start the motor and don't drive the light will stay on...

 

thanks Abdullah - did you 'not' have any codes? that is what is throwing me off. I dont have 'any' codes, according to the autozone scan tool.

 

thanks - i did drive too, no luck! so weird.

 

Have you messed with the connector to you MAF at all? If the connection is bad, you'll get the PSM and ABS Failure.

 

Ur welcome ,, in the dealer when he checked it with Bosch Scan tool
they didn't get any trouble shoot codes
But i did tryed to change the maf and the same thing
and i tryed the car in the street to check the problem when you push the brake hards its Wont stop you will get tire spinning
and by my self i changed the abs and the steering angle sensors the car
Runs Normaly Like before
I wish that you have a small problem not a big one

Best Regards
Abdullah

 

I have now, after the fact. I took the MAF out and cleaned it (spray) with MAF / electronics cleaner. I also checked connection wires, connector, etc - as best i could. hot wires all look perfect, but without a real scan tool i dont have a good way to scan.

 

is there really no 'real' way to diagnose? Just start buying MAF and wheel sensors and swapping? There must be a better way?

 

loool no wait don't buy if u go to dealer and let them check and install a maf they must have maf there to check the cars
and let them see which kinds of codes they get
if the problem still as i think from the Steering angle sensor and abs sensor
im not sure whats is the problem on your car but im telling you what do i did when i get the same problem thats all

Best Regards
Abdullah

 

I'm not a Porsche mechanic, but I have had a similar problem and it was due to me not getting the connector back on the MAF securely. I've also had a CEL come up because I wasn't paying attention and did not get a boost hose back in place 'securely' and I was leaking air a bit.

Also had a random CEL come up right after installing a new exhaust. I knew everything was correct, so I disconnected the battery for a half hour or so, hooked it back up and have not thrown a code since.

Just sayin...