Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
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A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1401LACK OF EGR FLOW
P1401LACK OF EGR FLOW
Manufacturer communications
10Original wording in English
MAZDA
MALFUNCTION INDICATOR LAMP (MIL) ON AND/OR DIAGNOSTIC TROUBLE CODES P0401, P0402, P1400 OR P1401 AND RUNS ROUGH, LACKS POWER, SURGE, POOR FUEL ECONOMY. *TT THIS BULLETIN REPLACES PREVIOUS BULLETIN DATED 4/26/04. *TT
FORD, LINCOLN, MERCURY
STREAMLINED DIAGNOSTIC PROCEDURE FOR VEHICLES WITH MALFUNCTION INDICATOR LAMP (MIL) ON AND DIAGNOSTIC TROUBLE CODES (DTCS) P0401, P0402, P1400 OR P1401. ADDITIONAL SYMPTOMS MAY INCLUDE RUNS ROUGH, LACKS POWER, SURGE, POOR FUEL ECONOMY. *TT
FORD, LINCOLN, MERCURY
STREAMLINED DIAGNOSTIC PROCEDURE FOR VEHICLES WITH MALFUNCTION INDICATOR LAMP ON AND DIAGNOSTIC TROUBLE CODES (DTCS) P0401, P0402, P1400 OR P1401. ADDITIONAL SYMPTOMS MAY INCLUDE RUNS ROUGH, LACKS POWER, SURGE, POOR FUEL ECONOMY. *TT
MAZDA
MALFUNCTION INDICATOR LAMP (MIL) ON WITH OR WITHOUT ROUGH RUNNING, LACK OF POWER, SURGE OR POOR FUEL ECONOMY, ALONG WITH DIAGNOSTIC TROUBLE CODES (DTCS) P0401, P0402, P1400 OR P1401. *TT
Check vehicle applicability
56A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Ford | CONTOUR ↗ | 1997 |
| Ford | CONTOUR ↗ | 1996 |
| Ford | CONTOUR ↗ | 1995 |
| Ford | CROWN VICTORIA ↗ | 2002 |
| Ford | CROWN VICTORIA ↗ | 2001 |
| Ford | E SERIES ↗ | 2002 |
| Ford | E SERIES ↗ | 2001 |
| Ford | ESCAPE ↗ | 2002 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
DPFE Circuit High Input
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.