P0402
P0402 means "EGR Flow Excessive Detected". Severity: 🟡 Moderate. You can often drive short distances, but address it promptly to avoid further damage.
What the P0402 code means
| Code | P0402 |
| Definition | EGR Flow Excessive Detected |
| System | Powertrain (engine & transmission) |
| Type | Generic (SAE standard) |
| Subsystem | Auxiliary Emission Controls |
| Severity | 🟡 Moderate |
Common causes of P0402
- Stuck-open EGR valve
- Faulty DPFE sensor
- Carbon buildup
How to fix P0402
- Clean or replace the EGR valve
- Test the DPFE sensor
Always confirm the diagnosis with a scan tool and live data before replacing parts.
Is it safe to drive with P0402?
You can often drive short distances, but address it promptly to avoid further damage.
P0402, answered.
What does P0402 mean?
P0402 stands for "EGR Flow Excessive Detected". It is a generic (sae standard) OBD-II powertrain trouble code.
Is it safe to drive with a P0402 code?
You can often drive short distances, but address it promptly to avoid further damage.
What causes P0402?
Common causes include: Stuck-open EGR valve; Faulty DPFE sensor; Carbon buildup.
How do you fix P0402?
Typical fixes: Clean or replace the EGR valve; Test the DPFE sensor. Always confirm the diagnosis before replacing parts.