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Engine Code Reader
Car and Truck Code Reader Information This
category contains featured questions as
examples. They relate to most vehicles.
Question: 2000 Ford
Mustang, mileage: 87,000. My check engine
light come on the other day, the car seemed
to run fine. Should I worry about this?
Answer: The Main
Engine/Transmission management system (PCM -
Powertrain Control Module) is what controls
your car engine, transmission and emissions
systems. The PCM is a small dedicated
computer loaded with a operating program.
The "Service Engine Soon" is
illuminated when the PCM has detected a
malfunction in the monitoring system. A
computer scanner can read trouble codes to
inform you on the particular sensor that has
failed. The 02 sensor (oxygen sensor) is a
maintenance item and should be replaced
every 60,000 to 90,000 miles and will cause
the "service engine soon" light.
Engine Scanner: All 1995 or
newer cars and light trucks are equipped
with a computer controlled engine management
system. Is your "check Engine" light on. You
can scan your computer for fault or error
codes with a hand held scanner for less than
$70 at eautoelectronics.com. The information
will pinpoint the malfunctioning components
and the sensors that need to be replaced.
Simply clear codes when complete.
After scanning your vehicle you will
receive a trouble code that will indicate
the sensor or system that is out of
operation range. But additional tests that
can effect the sensor or system that need to
be considered.
Example:1
If scanning indicates a MAS (Mass Air
Flow) problem. Inspect the intake boot or
PCV Valve for cracks or tears. Losing vacuum
between the throttle body and the mass air
flow causing a false reading.
Example:2 If
scanning indicates a EVAP (Evaporative
Emissions) system failure. Inspect gas cap
to be fastened properly. When your PCM
pressure tests the fuel vapor system it can
tell you there is a leak just not where, so
check the obvious, check the remainder of
the EVAP system from there.

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