Engine Error
P0155
O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
Severity
Low
Symptoms
Check engine light, longer engine warm-up time
Common Causes
- Blown O2 sensor heater fuse
- Failed internal O2 sensor heater element
- Corroded O2 sensor connector
- Open circuit in wiring harness
How to Fix
- 1 Check and replace blown fuses
- 2 Replace Bank 2 Sensor 1 O2 sensor
- 3 Clean and apply dielectric grease to connector
- 4 Repair broken wiring
Estimated Repair Cost
USD
$10
–
$300
Fuse: $10; O2 Sensor replacement: $150 - $300