Chrysler PT Cruiser 2001 Service Manual Supplement page 2545

P0141-1/2 O2 SENSOR HEATER FAILURE —
TEST
4 Turn the ignition off.
Disconnect the O2 Sensor harness connector.
Measurement is taken at the component side of connector.
Measure the resistance between the O2 Sensor Heater Feed circuit and the O2
Sensor Heater Control/Ground circuit.
Is the resistance between 3.0 and 7.0 ohms?
Yes → Go To 5
→ Replace the O2 Sensor.
No
5 If there are no possible causes remaining, replace the PCM.
If there are no possible causes remaining, view repair.
Repair
6 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.
Replace the PCM.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
DRIVEABILITY - GAS
Continued
85
APPLICABILITY
All
All
All