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P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN —
TEST
5
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Ignition on, engine not running.
With the DRBIII , monitor the O2 Sensor voltage.
Is the voltage above 4.8 volts?
Yes → Go To 6
→ Check the O2 Signal circuit for a short to ground, open, or short
No
6
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?
Yes → Check the fuel system for contaminants.
→ Check the O2 Return circuit for a short to ground, open, or short
No
ACTION
to voltage. Inspect the O2 Sensor connector and the PCM harness
connector. If OK, replace and program the Powertrain Control
Module in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
to voltage. Inspect the O2 Sensor connector and the PCM harness
connector. If OK, replace and program the Powertrain Control
Module in accordance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
DRIVEABILITY - NGC
279
Continued
APPLICABILITY
All
All
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