Chrysler Sebring 2004 Service Manual page 2016

P0172-1/1 FUEL SYSTEM RICH —
TEST
1 NOTE: Check for contaminates that may have damaged the O2 Sensor:
contaminated fuel, unapproved silicone, oil and coolant.
Turn the ignition on.
With the DRBIII , read DTC's.
Is the Good Trip displayed and equal to zero?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2 Warning: The fuel system is under a constant pressure (even with the engine
off). Before testing or servicing any fuel system hose, fitting or line, the fuel
system pressure must be released.
Install a fuel pressure gauge.
Turn the ignition on.
With the DRBIII , actuate the ASD Fuel System test and observe the fuel pressure
gauge.
NOTE: Fuel pressure specification is 400 KPa +/- 34 KPa (58 psi +/- 5 psi).
Turn the ignition off.
Choose a conclusion that best matches your fuel pressure reading.
Within Specification
Above Specification
Caution: Stop All Actuations.
3 Turn the ignition on
With the DRBIII , read the O2 Sensor voltage.
Is the voltage between 0.4 to 0.6 volts?
Yes → Go To 4
→ Go To 11
No
4 Turn the ignition off.
NOTE: Wait a minimum of 10 minutes to allow the O2 Sensor to cool down
before continuing the test. Allow the O2 Sensor voltage to stabilize between
0.4 to 0.6 volts.
Turn the ignition on.
With the DRBIII , actuate the O2 Heater Test.
With the DRBIII , monitor O2 Sensor voltage for at least 2 minutes.
Does the voltage stay between 0.4 and 0.6
Yes → Replace the O2 Sensor.
→ Go To 5
No
Continued
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Go To 3
Replace the fuel filter/pressure regulator.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
87
APPLICABILITY
All
All
All
All