TEST ACTION APPLICABILITY
1 NOTE: If one of the O2 Sensors Signal or Return circuits are shorted to
ground or voltage, all the other O2 Sensor voltage readings will be affected.
NOTE: It is important to perform the diagnostics on the O2 Sensor that set
the DTC.
NOTE:After the repairs have been made, verify proper O2 Sensor operation.
If all the O2 Sensor voltage readings have not returned to normal, follow the
diagnostic procedure for the remaining O2 Sensors.
NOTE: Check for contaminants that may have damaged the O2 Sensor:
contaminated fuel, unapproved silicone, oil and coolant.
Ignition on, engine not running.
With the DRBIIIt, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
All
Yes → Go To 2
No → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
2 Start the engine.
Inspect the exhaust system for leaks between the engine and the O2 Sensors.
Are there any exhaust leaks?
All
Yes → Repair or replace the leaking exhaust parts as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 3
3 Turn the ignition off
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the O2 Signal circuit in the O2 Sensor harness connector.
Is the voltage between 4.5 and 5.2 volts?
All
Yes → Go To 4
No → Check the O2 Signal circuit for damage, short to ground, open, or
short to voltage. If OK, replace and program the Powertrain
Control Module in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
4 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the O2 Return circuit in the O2 Sensor harness connector.
Is the voltage at 2.5 volts?
All
Yes → Check the O2 Return circuit for damage, short to ground, open, or
short to voltage. If OK, replace and program the Powertrain
Control Module in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 5
5 If there are no possible causes remaining, view repair. All
Repair
Replace the O2 Sensor
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
99
DRIVEABILITY - NGC
P0133-O2 SENSOR 1/1 SLOW RESPONSE — Continued
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