Chrysler 2005 Crossfire SRT6 Service Manual page 2182

9 - 258 ENGINE - ELECTRICAL DIAGNOSTICS
(P0173) FUEL SYSTEM 2/1 RICH CONTROL OVER LIMIT (AT LOAD) (CONTINUED)
8.
ENGINE MECHANICAL PROBLEM
Turn the ignition off.
Check for any of the following conditions/mechanical problems.
AIR INDUCTION SYSTEM - must be free from leaks.
ENGINE VACUUM - must be at least 440 mbar (13 in. Hg) in neutral
ENGINE VALVE TIMING - must be within specifications
ENGINE COMPRESSION - must be within specifications
ENGINE EXHAUST SYSTEM - must be free of any restrictions or leaks.
ENGINE PCV SYSTEM - must flow freely
TORQUE CONVERTER STALL SPEED - must be within specifications
POWER BRAKE BOOSTER - must not have any internal vacuum leaks
FUEL - must be free of contamination
FUEL INJECTOR - must not have a plugged or restricted injector; or control wire not connected to correct injector
Are there any engine mechanical problems?
Yes >> Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST - VER 2.
No >> Go To 13
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.
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
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