Engine Error
P0134
O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
Severity
Medium
Symptoms
Engine stays in open loop, poor fuel efficiency, rough idle
Common Causes
- Dead oxygen sensor
- Blown O2 sensor heater fuse
- Broken signal wire
- Corrosion in sensor plug
How to Fix
- 1 Replace upstream O2 sensor
- 2 Check and replace related fuses
- 3 Perform continuity test on wiring
- 4 Clean electrical connector
Estimated Repair Cost
USD
$10
–
$350
Fuse: $10; O2 Sensor: $150 - $350