Combined ABS & PSM OFF Fault lights - any ideas?

[cjp79]

On first brake application after each engine start both the ABS and the PSM Off fault lights on the dash come on. Just wondering if anybody knows what could be the cause of this before I take the car to a dealers? Many thanks in advance for your help.

It's a 2001 996 C4 coupe 6 spd.

[Loren]

If you live in the US take the car to an Autozone or other parts supply business and get your fault codes read for free.

Check for a P0102 fault. P0102 is the same error you will get if the MAF is unplugged. This can also cause ABS and PSM lights to come on as the DME is not sensing the PSM data and combining it with the throttle position and mass air flow readings.

[ianwallwork]

On first brake application after each engine start both the ABS and the PSM Off fault lights on the dash come on. Just wondering if anybody knows what could be the cause of this before I take the car to a dealers? Many thanks in advance for your help.

It's a 2001 996 C4 coupe 6 spd.

This will be caused by the brake light activation switch being faulty. This sits behind the bottom of the dash over the brake pedal. They're notorious for failing on pre-facelift cars - I even used to keep a spare in the car!! No problem with the current car so maybe they were changed for 2002.

The part is cheap, fitting time is approx 1 minute.

Hope this helps

Ian W

Edited October 4, 2006 by ianwallwork

[cjp79]

Great advice - I will try that out.

Many thanks for your help.