Engine Error
P0154
O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)
Severity
Medium
Symptoms
Engine stays in open loop, sluggish performance
Common Causes
- Dead Bank 2 O2 sensor
- Broken O2 sensor wiring
- Blown heater fuse
- Bad PCM ground
How to Fix
- 1 Replace Bank 2 Sensor 1
- 2 Fix broken signal wires
- 3 Replace related fuse
- 4 Clean ground terminals
Estimated Repair Cost
USD
$10
–
$350
Fuse: $10; O2 Sensor: $150 - $350