Engine Error
P0142
O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
Severity
Low
Symptoms
Check engine light, failed emissions test
Common Causes
- Faulty O2 sensor (Bank 1, Sensor 3)
- Damaged exhaust wiring harness
- Exhaust leak near sensor
- Corroded connector
How to Fix
- 1 Replace Bank 1 Sensor 3 O2 sensor
- 2 Repair damaged wiring
- 3 Weld or patch exhaust leak
- 4 Clean electrical connector
Estimated Repair Cost
USD
$100
–
$300
O2 sensor replacement: $150 - $300