Year of Manufacture *: 2005
Engine Size and Code *: 1400 16v
Polo came in for annual service, we advised that the cambelt was due for replacement, customer gave us the ok.
Shortly after the car was returned to the customer he complained of a low idle speed and lumpy idle.
A DTC scan revealed 17961 - manifold pressure signal P1553 - implausible correlation.
Cleaned the MAP sensor, checked the o ring seal, checked all the pipe work near where the tech had been doing the cambelt= all appeared to be ok.
Carried out a road test and it cut out at low speed, the EPC warning came on and struggled to re start. Another DTC check = same code returned (VCDS used)
Got back to the workshop and further checks showed that the brake servo hose has several split in it. This is on of the rigid plastic hoses, but at all the connection points on it the pipe has split and was leaking vacuum.
Obviously moving the engine around when replacing the cambelt has caused a weakened part to fail.
These rigid brake servo hoses are fitted to umpteen cars now but I have never seen one like this!! I will be taking more notice of them in future - especially on VAGs.
Nick
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