Mercedes S500 1998 – Diagnostic

Came in with the “check engine” light illuminated.

I Check for fault codes, 1 stored, P0105 intake manifold pressure sensor fault.

I then checked the vehicle live data and the map sensor was reading atmospheric pressure key on engine off as it’s suppose to.
I then started the engine and the reading was still atmospheric pressure (1 Bar), the actual reading should be around 400mbar, as there is a vacuum now in the intake.

Time for a visual inspection! Upon opening the bonnet and removing the engine cover and air boxes it was clear to see we had a intruder, in the form of a rat.

After clearing out the mess left behind by the intruder it was very clear what the problem was! He had chewed right through the pipe from the intake manifold to the sensor. A new piece of pipe installed and all is good again.

A quick and easy diagnosis..

No unnecessary parts fitted!!
#firsttimefix