Symptom List:
P0135-O2 SENSOR 1/1 HEATER PERFORMANCE
P0141-O2 SENSOR 1/2 HEATER PERFORMANCE
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P0135-O2 SENSOR 1/1 HEATER
PERFORMANCE.
When Monitored and Set Condition:
P0135-O2 SENSOR 1/1 HEATER PERFORMANCE
When Monitored: Engine Running and Heater duty cycle greater than 0%
Set Condition: O2 Heater Temperature does not reach 350°C (662°F) within 90 second
during monitoring conditions. Two Trip Fault.
P0141-O2 SENSOR 1/2 HEATER PERFORMANCE
When Monitored: Engine Running and Heater duty cycle greater than 0%.
Set Condition: O2 Heater Temperature does not reach 350°C (662°FL) within 90 second
during monitoring conditions. Two Trip Fault.
POSSIBLE CAUSES
O2 SENSOR HEATER OPERATION
O2 HEATER ELEMENT
O2 HEATER GROUND CIRCUIT OPEN
O2 HEATER CONTROL CIRCUIT OPEN
PCM
TEST ACTION APPLICABILITY
1 Ignition on, engine not running.
With the DRBIIIt, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter display and equal to zero?
All
Yes → Go To 3
No → Go To 2
100
DRIVEABILITY - NGC
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