Warm Up Catalyst Temperature System Bank 1 Threshold

What This Means

The warm up catalyst temperature monitoring system for bank 1 has detected a performance issue. The catalytic converter is not meeting expected efficiency or temperature thresholds for proper emission control.

Common Symptoms

• Check engine light on
• Failed emissions test
• Reduced performance
• Possible exhaust smell

Common Causes

• Degraded catalytic converter
• Exhaust leak
• O2 sensor failure
• Engine running issue
• Converter contamination

Estimated Repair Cost