Renault clio not starting - Crankshaft position sensor problem
Sometimes a Renault Clio may not start because of problems with its
crankshaft position sensor. It will turn over but won't fire up.
The crankshaft position sensor is used by the cars ECU to determine where
the crankshaft is at any given time, then it can decide when and what spark
plug to use, and what injector needs to spray, if the sensor is faulty, it
has no way of knowing what to do and therefore will not start.
Its quite an easy component to get to, its found just below the air filter
housing, and is held in with 2 10mm bolts and an electrical connector, a
quick clean usually gets it fixed.
About 2 years ago the clio was having problems with this constantly and was
having no start problems quite often, i was regularly cleaning the sensor
as it was getting covered in oil, it turned out that the oil was leaking
through the air filter housing as the crankcase breather was blocked, when
cleaning the throttle body i also cleaned the crankcase breather.
In this video i replicated the problems i had by simply unplugging the
sensor, although it was a bit dirty, it was still working fine, when there
was an oil leak the sensor used to get covered in muck.
This is the throttle body cleaning video here:
Although i don't show cleaning out the crankshaft breather pipe or PCV
valve in the video, when you have the inlet manifold off its easy to clean
Anyhow its a simple fix that should help if you need to get your car