U019D

Symptoms

• Check Engine Light Illuminates
• Possible reduction in catalyst efficiency
• Incorrect catalyst temperature data
• Other CAN bus related error codes

Causes

• Malfunction of the catalyst temperature sensor
• Open or shorted sensor wiring
• Problems with the CAN bus
• Engine control module (ECU) malfunction

How to Fix

1. Check the wiring and connectors of the catalyst temperature sensor for damage
2. Check catalyst temperature sensor to manufacturer specifications
3. Check the CAN bus for breaks or short circuits
4. Check ECU for errors and update software if necessary

Related codes

Error U019D by Vehicle Brand