Codes › GENERIC › DTC-OBD2 › P0400
GENERIC • DTC-OBD2 • P0400 Category: EmissionsExhaust Gas Recirculation Flow Malfunction
Problem detected in EGR system flow.
This fault code indicates incorrect exhaust gas recirculation flow. The EGR system may be clogged, stuck, or malfunctioning. Improper EGR operation can lead to rough running and increased emissions.
Related DTC-OBD2 codes
- DTC-OBD2 P2463 — Diesel Particulate Filter Soot Accumulation
- DTC-OBD2 P242F — Diesel Particulate Filter Restriction – Ash Accumulation
- DTC-OBD2 P2097 — Post Catalyst Fuel Trim System Too Rich (Bank 1)
- DTC-OBD2 P2096 — Post Catalyst Fuel Trim System Too Lean (Bank 1)
- DTC-OBD2 P207F — Reductant Quality Performance – Inducement
- DTC-OBD2 P206A — Reductant Quality Performance
Frequently Asked Questions
What does DTC-OBD2 code P0400 mean?
DTC-OBD2 code P0400 is a factory equipment code used by GENERIC to describe a specific vehicle configuration or component.
Where can I find DTC-OBD2 code P0400 on my car?
This code is typically found in the vehicle’s factory build data, service documentation, or can be confirmed by decoding the VIN.
Does DTC-OBD2 code P0400 affect maintenance or parts?
Yes. Factory codes determine correct parts selection, software compatibility, and service procedures for your exact vehicle configuration.
How can I verify DTC-OBD2 code P0400 for my vehicle?
The most reliable way is to order a complete Vehicle Data Sheet decoded directly from your vehicle’s VIN.