25. May 2010 · Write a comment · Categories: Cars · Tags: , ,

I’ve started getting this problem which at first happened intermittently during a long journey (1 hour plus), and is now happening almost every journey. A beep, followed by both ABS and the DSC light being illuminated orange.

Using carsoft to interrogate the ABS/DSC unit returns the following:

5E21 – Pressure sensor 2 accident recognition.

There are 2 sensors in the master brake cylinder. The prressure sensor from BMW is nearly £150 inc VAT, but I found one on Ebay German for €14 and €12 shipping to the UK. Will fit and report back….

The ECU also reported:

4252 and 4262 which are glow plugs cylinder 5 and 6, so I will check the wiring, again.

UPDATE: I fitted the cheap sensor I found on German Ebay – lost a bit of fluid so re-bled the brakes and the light has gone out 🙂

Smoking on startup, poor mpg.  Read the fault codes with Carsoft:

4BC2 – Air mass meter

4BC7- Air mass meter

4BA0- Air mass meter

4222 Cylinder 2 : Activation interrupted

4242 Cylinder 4: Activation interrupted

4252 – Glow spark cylinder 5

I am currently trying with the MAF disconnected to see if it improves MPG.  3 failed glow plugs might explain the smokey start up!  Apparently they are also used when the engine is running.

A quick scour of the web and I was able to fill them all, bar the Activation Interrupted ones.

This post has a bit more information – calentadores – in Spanish means heaters.  So glow plugs again.

So I replaced the glow blugs.  Using a PDF on Beru’s website (they make the originals) they give the breakage torque, so using a torque wrench set below this I was able to get them all out successfuly, using plenty of plus gas.  No smoking / rough running at start up now 🙂