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ANY PART
FOR
ANY CAR
OVER 200 BRANCHES NATIONWIDE
Air Mass/Flow Sensors/Meters
Mercedes C-Class, E-Class, S-Class
Diesel M611 M612 00>
Pierburg Air Mass Sensor
£43
.99
434 22 0200
Jaguar XJ, Land Rover
TDV6 03-10
VDO Air Flow Meter
£72
.99
434 63 0120
BMW 2.0, 2.5, 3.0 Diesel
All Series 05-EU4
Bosch Air Mass Meter
£124
.99
434 11 0637
Ford Transit Connect
1.8DI 2.2D 02>
ERA Air Mass Meter
£48
.99
434 59 0250
Renault Clio, Megane
Volvo S40, V40 1.9DCI DTI 98>
VDO Air Mass Sensor
£67
.99
434 74 5000
Y
our local Euro Car Parts branch stocks a market-leading
range of engine management, emission control and
fuel management products. Make us your first call.
Winter is the time of year when vehicle electrical
components are under real pressure to perform.
Many electrical parts work under extreme
conditions from freezing start up temperatures
to high operating temperatures, moisture, dust
and dirt. These extreme conditions often lead
to failure at the most inconvenient time.
But what’s the function of these components? What do
they do within a vehicle’s engine management system?
Air flow meter
A mass air flow sensor (MAF) is used to measure the
mass flowrate of air entering a fuel-injected engine. The
air mass information is necessary for the engine control
unit (ECU) to balance and deliver the correct fuel mass
to the engine, creating the optimum fuel and air mixture
to ensure the vehicle runs as efficiently as possible.
Crankshaft position sensor
A crank sensor is used to monitor the position or
rotational speed of the crankshaft. This information
is used by ECU to control the fuel injection or the
ignition system timing and other engine parameters.
The crank sensor can be used in combination with
a similar camshaft position sensor to monitor the
relationship between the pistons and valves in the engine,
which is particularly important in engines with variable
valve timing. This method is also used to “synchronise”
a four-stroke engine during start-up, allowing the
management system to know when to inject the fuel.
MAP sensor
The manifold absolute pressure sensor (MAP Sensor)
provides manifold pressure information to the engine’s
ECU. This is used to calculate the air density and
determine the engine’s air mass flow rate which
in turn determines the required fuel metering for
optimum combustion. Generally, a naturally aspirated
engine will use either a MAF sensor or a MAP sensor,
while a turbocharged engine typically uses both.
Exhaust gas temperature sensor (EGTS)
With emission standards becoming increasingly
stringent, vehicle manufacturers are developing newer
technologies to meet cleaner exhaust gas legislation.
An EGTS measures temperatures in the exhaust system,
typically up to 900°C. The resistance of the EGTS
alters with any change in exhaust temperature. The
change in resistance is registered by the ECU in order
to control engine conditions and effectively reduce
emissions. It also protects components located in the
flow of hot exhaust gas from critical overheating.
Timely diagnosis and replacement of a
defective EGTS prevents damage to the
DPF and subsequent engine damage.