Chrysler 2005 Crossfire SRT6 Service Manual page 2171

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(P0172) FUEL SYSTEM 1/1 LEAN CONTROL BELOW LIMIT (AT LOAD) (CONTINUED)
9.
O2 SENSOR
Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Note: Check connectors — Clean/repair as necessary.
Turn the ignition on.
With the DRB III , monitor the O2 Sensor voltage.
Note: The O2 Sensor voltage should read 0.47 volt on the DRB
III with the harness connector disconnected.
Connect a jumper wire between the O2 Sensor Signal circuit and the
Sensor Ground circuit at the O2 Sensor harness connector.
Note: The voltage should drop from 0.47 volt down to 0.0 volt
with the jumper wire connected.
Did the O2 Sensor voltage drop from 0.47 volt to 0.0 volt?
Yes >> Replace the Oxygen Sensor. (Refer to 14 - FUEL SYS-
TEM/FUEL INJECTION/O2 SENSOR - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Go To 10
10.
O2 SENSOR SIGNAL CIRCUIT
With the ignition on.
With the DRB III , monitor the O2 Sensor voltage.
Is the voltage below 0.45 volt?
Yes >> Go To 11
No >> Check the O2 Sensor Signal circuit for a short to ground,
open, or short to voltage. Inspect the O2 Sensor harness
connector and the PCM harness connector. If OK, replace
and program the Powertrain Control Module in accordance
with the Service Information. (Refer to 8 - ELECTRICAL/
ELECTRONIC
CONTROL MODULE - REMOVAL).
Perform POWERTRAIN VERIFICATION TEST - VER 2.
CONTROL MODULES/POWERTRAIN
ENGINE - ELECTRICAL DIAGNOSTICS 9 - 247