P0134

Tests 1 - 3:

Tests 4 - 8:

SYMPTOM
P0134 - 1/1 O2 SENSOR STAYS AT CENTER

WHEN MONITORED
With the engine running for more than 2 minutes and engine coolant temperature greater than 170 degrees.

SET CONDITION
The upstream oxygen sensor signal voltage is between 0.35 volt and 0.55 volt for 1.5 minutes.

POSSIBLE CAUSES
- 1/1 O2 sensor ground circuit open
- 1/1 O2 sensor signal circuit open
- 1/1 O2 sensor wiring harness intermittent defect
- 1/1 O2 sensor wiring harness observable defect
- 1/1 O2 sensor connector observable defect
- 1/1 O2 sensor defective
- PCM defective