P23C2

Symptoms

• Check Engine light comes on
• Possible problems with engine performance
• Increased fuel consumption
• Unstable engine idling
• Possible exhaust smell

Causes

• NOx sensor faulty (bank 1, sensor 3)
• Damaged NOx sensor wiring or connectors
• Leaks in the exhaust system
• NOx catalytic converter malfunction
• Problems with the ECU (electronic control unit)

How to Fix

1. Check the NOx sensor wiring and connectors for damage.
2. Check the NOx sensor to ensure it meets manufacturer specifications.
3. Check the exhaust system for leaks.
4. Check the NOx catalytic converter for problems.
5. Replace the NOx sensor (bank 1, sensor 3) if it is faulty.

Related codes

Error P23C2 by Vehicle Brand