p2402
Moderate
Volvo · SUVs
Nitrogen Oxide (NOx) Sensor Circuit Malfunction
Quick Answer
Error code P2402 on your Volvo SUVs means: Nitrogen Oxide (NOx) Sensor Circuit Malfunction. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Inspect NOx sensor connector
2
Check sensor wiring for damage
3
Test sensor voltage output
4
Verify DEF fluid level
5
Replace NOx sensor if faulty
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
NOx sensor
sensor connector
DEF fluid
Related Error Codes