Daewoo MATIZ Service Manual page 188

1F – 90 ENGINE CONTROLS
DIAGNOSTIC TROUBLE CODE (DTC) – P0133 OXYGEN SENSOR NO ACTIVITY
Circuit Description
The engine control module (ECM) supplies a voltage of
about 450mm volts between the ECM terminals 44 and
13. The oxygen (O ) sensor varies the voltage within a
2
range of about 1volt if the exhaust is rich, down to about
100mm volts if the exhaust is lean. The O
an open circuit and produces no voltage when it is below
360°C(600°F). An open O
sensor causes "open loop" operation.
Conditions for Setting the DTC
D The engine controls system is in closed loop.
D Engine Coolant Temperature is higher than 60°C
(140°F).
D The mass air flow(MAF) is between 75mg/tdc and
100mg/tdc.
D The engine speed is between 3,008rpm and
3,500rpm.
D The vehicle speed is between 45km/h(27.96mph)
and 55km/h(34.2mph).
D The manifold air pressure is higher than 90kPa.
D The ignition is at 10 volts.
D The upstream O
sensor periods higher than 1.6 sec-
2
onds.
D A number of glitches higher than 5 during the test.
sensor is like
2
sensor circuit or a cold O
2
D DTCs P0107, P0108, P0112, P0113, P0117, P0118,
P0122, P0123, P0131, P0132, P0131, P0132,
P0137, P0138, P1671, P0300, P0335, P0336,
P0341, P0400, P0404, P0405, P0444, P0445 are
NOT SET.
Action Taken when the DTC Sets
D Emission related.
2
D "Armed" after two trip with a fail.
D "Disarmed" after one trip with a pass.
D MIL on if failure is detected in three consecutive trips.
D Stores a History DTC on the third consecutive with a
fail (The DTC will be armed after the second fail).
D Stores a Freeze Frame on the third consecutive trip
with a fail (if empty).
Conditions for Clearing the MIL/DTC
D The MIL will turn off after four consecutive ignition
cycles in which the diagnostic runs without a fault.
D A history DTC will clear after 40 consecutive warm up
cycles without a fault.
D DTC(s) can be cleared by using the scan tool.
Diagnostic Aids
Normal scan tool voltage varies between 0.15 to 8.5mV
while in Closed Loop. If DTC P0133 is intermittent, refer
to "Intermittent" in this Section.
MAA1F130
DAEWOO M-150 BL2