Engine Error
P0424
Heated Catalyst Temperature Below Threshold (Bank 1)
Severity
Medium
Symptoms
Check engine light, failed emissions test
Common Causes
- Defective heated catalyst element
- Faulty catalyst temperature sensor
- Wiring issue to the heated cat/sensor
- Exhaust leak
How to Fix
- 1 Replace heated catalytic converter assembly
- 2 Replace catalyst temperature sensor
- 3 Repair wiring harness
- 4 Fix exhaust leaks
Estimated Repair Cost
USD
$100
–
$2500
Temp sensor: $150; Catalytic converter: $1,000 - $2,500