Chrysler PT Cruiser 2001 Service Manual Supplement page 2612

DRIVEABILITY - GAS
P1195-1/1 O2 SENSOR SLOW DURING CATALYST MONITOR —
TEST
4 Turn the ignition off.
Ensure the voltmeter leads are connected for positive polarity.
Backprobe between the O2 Sensor Ground circuit at the O2 Sensor harness connector
and the PCM harness connector.
Start the engine and allow the engine to reach normal operating temperature.
Is the voltage below 0.10 volt?
Yes → Go To 5
→ Repair high resistance on O2 Sensor Ground circuit.
No
5 Turn the ignition off.
Ensure the voltmeter leads are connected for positive polarity.
Backprobe the O2 Sensor Signal circuit between the O2 Sensor connector and PCM
connector.
Start the engine and allow the engine to reach normal operating temperature.
Is the voltage below 0.10 volt?
Yes → Go To 6
→ Repair high resistance in O2 Sensor Signal circuit.
No
6 If there are no potential causes remaining, view repair.
Repair
7 Start engine. Allow the engine to reach normal operating temperature.
Check the exhaust for excessive smoke from internal oil or coolant leaks.
Is there an oil or coolant consumption condition present?
Yes → Repair engine for excessive blowby (oil or coolant) as necessary.
→ Go To 8
No
8 Start the engine and allow engine to idle.
Check for any exhaust leaks between the engine and the appropriate O2S.
Check for exhaust leaks between the engine and the appropriate downstream O2
Sensor.
Are there any exhaust leaks?
Yes → Repair or replace leaking exhaust parts as necessary.
→ Go To 9
No
9 Turn the ignition off.
Note: Visually inspect the related wiring harness. Look for any chafed,
pierced, pinched, or partially broken wires.
Note: Visually inspect the related wire harness connectors. Look for broken,
bent, pushed out, or corroded terminals.
Note: Refer to any Technical Service Bulletins (TSB) that may apply.
Perform a wiggle test on the related wiring harnesses with the engine running.
Watch for the Good Trip Counter to change to 0.
Were any problems found?
Yes → Repair wiring harness/connectors as necessary.
→ Test Complete.
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace the O2S.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
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Continued
APPLICABILITY
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