My MAF is 1.35 - 1.41V .... MAF replaced last week ... still get the occassional Hot MAF Film .... car is BONE stock except for RPI Exhaust ..

 

Have you got the name of the person who sorted it

 

if you had already ceck your maf take a look at the o2 sensnors
i was have the same problem last year and th problem was the first
o2 sensors .

 

in some cases it is the stoplight switch is out of order, and force a abs/psm failure ABS / PSM Warning Light On
ABS / PSM gauge light appears for no apparent reason.

Possible Causes:
•A wheel came off the ground, wheel hop from accelerating quickly at a low speed, or you hit a pothole (Solution: Turn off the car completely, then turn it back on. The ABS/PSM light will clear itself if this was the case.)
•Failed Brake Sensor (Solution: replace brake sensor approx $20.00)
•Failed or damaged wheel speed sensor (Solution: check datalog codes for left or right sensor failure, swap left and right sensors and see if the failure moves to the opposite side. Replace if code states failure moved to opposite side. Leave sensors alone if code doesn't change.)
•ABS Ring on Axle (Solution: clean the ring)
•Bad Wiring Harness (Testing: Run double 16ga wire from wheel speed sensor directly to ABS box and check for code to clear itself. Solution: Order repair kit and fix harness.)
•Bad ABS Module (This is expensive and should be your last resort. Solution: Repair ABS Module

 

Would these apply to Hot Film MAF codes?

 

i understand your question, but after a new maf and checked connections i would look at a new diagnoseroute....direct at abs/psm system...

 

So a malfunction of the ABS/PSM system would fire off a Hot Film MAF as well?

 

Boost hoses are all nice and tight.
Checked my brake lights are working. Does this mean by brake switch is ok ?

 

check the O2 sensor ...............................??????????????:roll eyes:

 

no that is tricky thing....brake lights work....

 

with durametric no problem....and quick to do....compare left and right side....

 

k I have durametric ... could anyone give me a hand to figure out whats what?

 

what values in the Durametric software we have to tic to check for faulty O2 sensors, and when checking does the car need to be drivin or just idling?

and how do i know if its faulty, does the reading from both sides has to match?

 

RPM Mass air flow Oxygen sensing, bank 1 Oxygen sensing, bank 2 Boost pressure of sensor






log it at idle....lambda on both sides schould be near equal....lambda 1

check it under load and especially in the case when failure comes...under load lambda is under 1... but both sides near equal

 

Thank YOU for posting this...
Will need to use this.
My 996 C4 was damaged in Driver Side front wheel (torn off)
Had it ALL replaced, and PSM/ABS lights are on.

Will follow your steps trying to see if I can find the problem.
Thanks a million bud!!!!!!!!