P0130,P0132, P0133
Symptom: The CHECK ENGINE lamp (MIL) is on. Any other diagnostic trouble codes
(such as misfiring, closed loop, adaptation).
Front heated oxygen sensor (oxygen sensor 1)
Symptom of fault
The CHECK ENGINE lamp (MIL) is on. Any other diagnostic trouble codes
(such as misfiring, closed loop, adaptation).
Conditions
P0130: All-embracing DTC
P0132: Ignition switch in ON position. sensor voltage >1500 mV for more than 5
sec.
P0133: Diagnosis not yet performed this trip. • Speed=0 Idling. • Closed loop
active. • Coolant temperature >60C (>140°F). • Oxygen sensor preheater
current <1500 mA. • Oxygen sensor voltage oscillates at too low a
frequency.
Diagnostic help
Operation of the oxygen sensor can be ascertained using an ISAT scan
tool.
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Select
"READ FUNCTIONS".
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Select
"OXY SENSOR FRONT".
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When closed loop is active the ISAT scan tool reading should oscillate between
0.1 and 0.9 V.
If the reference ground or sensor voltage of any of the oxygen sensors is short-circuited
to battery positive (B+) in the wiring harness or in any of the oxygen sensors, DTCs P0132
and P0138 will probably both be generated.
The control module inputs of the oxygen sensors are high-ohmic. If moisture gets into
the connectors of some of the oxygen sensors, a diagnostic trouble code will be
generated.
Checking the wiring. Intermittent faults may occur as a result of occasional short circuits
and breaks in the wiring. Jiggle the leads and in-line connectors at several places and in
different directions to reveal faults in the wiring harness. Observe the multimeter, ISAT scan
tool or test lamp while carrying out this check.
Diagnostic procedure
1. Check additional diagnostic trouble codes in the Trionic
system
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Obtain readouts of all diagnostic
trouble codes using the ISAT scan tool.
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Are P0132 and P0138 present?
Continue with point 2.
Continue with point 3.
2. One of the oxygen sensor leads connected to electronic control
module pin 23, 70 or 47 is short-circuited to battery positive (B+) in the wiring harness or in
one of the oxygen sensors.
Check the insulation of the oxygen sensors.
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Unplug the 4-pin connectors of
both oxygen sensors.
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Check the resistance of both
sensors:
•pins 1-3
__________ar;_______
_______ O L (Over Load = infinite
resistance)
•pins 1-4
__________ar;_______
_______ O L (Over Load = infinite
resistance)
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Are all readings OK?
Rectify the lead between the connectors of both sensors and pin 23, 70 or 47
of the electronic control module and then proceed to point 4.
Change the relevant oxygen sensor and proceed to point 4.
3. Check the oxygen sensor's electrical
interfaces
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Unplug the oxygen sensor's
4-pin connector.
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Replace the sensor with a
conventional 1.5 V battery in good condition.
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Connect the battery's
positive (+) pole to pin 4 of the connector.
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Connect the battery's
negative (-) pole to pin 3 of the connector.
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Ignition switch in ON
position.
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Connect an ISAT scan
tool.
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Select
"READ FUNCTIONS".
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Select
"OXY SENSOR FRONT".
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The ISAT scan tool must show approx. 1.4 V.
Does the ISAT scan tool show about "1.4 V"?
Change the oxygen sensor and continue with point 4.
Check the leads between
pin 4 of the connector and pin 23 of the electronic control module and between
pin 3 of the connector and pin 47 of the electronic control module for continuity or shorting and
rectify them as necessary. Then continue with point 4.
4. Final check
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Clear the diagnostic trouble
code.
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Implementation of driving
cycle:
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Ignition switch in ON position, A/C
switched off and temperature sensor unplugged from the ICE so that the radiator fan runs
continuously
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Start the engine and run it at idling speed until the temperature of the coolant
rises above 60°C (140°F), or for at least 1 minute.
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Depress the accelerator for a second or so and then let the engine run at idling
speed for 30 seconds. Do this twice again.
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Evaluation of driving
cycle:
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Connect an ISAT scan
tool.
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Select
"DIAGNOSTIC STATUS".
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Select
"OXY SENSOR FRONT".
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Does the ISAT scan tool show "NOT READY"?
Repeat the driving cycle.
Check whether the diagnostic trouble code has recurred.
Has the diagnostic trouble code recurred?
Proceed to
.
The remedial measure taken was correct.
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Connect the temperature sensor to
the ICE.
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Clear the diagnostic trouble code
for the temperature sensor in the ICE.
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