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.
Narrow by vehicle
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 communications
9Original wording in English
FORD, LINCOLN, MERCURY
MALFUNCTION INDICATOR LAMP (MIL) LIGHT ON AND DIAGNOSTIC TROUBLE CODES (DTCS) P1405 OR P1406 WITH NO OTHER DTCS. *TT
FORD, MERCURY
SOME VEHICLES MAY EXHIBIT A MALFUNCTION INDICATOR LAMP (MIL) ON WITH EGR SYSTEM RELATED DIAGNOSTIC TROUBLE CODES P0400, P0401, P0402, P1400, P1401, P1405, P1406, P1408, P1409. *TT
FORD
INFORMATION ON VEHICLES EQUIPPED WITH 5.4L EXHIBITING A MALFUNCTION INDICATOR LIGHT (MIL) 'ON' AND DIAGNOSTIC TROUBLE CODE (DTC) P1406 WHICH MAY BE CUASED BY THE POWERTRAIN CONTROL MODULE (PCM) CALIBRATION. *TT
FORD
THE MALFUNCTION INDICATOR LAMP (MIL) MAY ILLUMINATE WITH DIAGNOSTIC TROUBLE CODE (DTC) P1406 STORED IN MEMORY. *TT
Check vehicle applicability
15A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chevrolet | S SERIES ↗ | 1995 |
| Chevrolet | T SERIES ↗ | 1995 |
| Ford | CROWN VICTORIA ↗ | 2003 |
| Ford | E SERIES ↗ | 1999 |
| Ford | E-150 ↗ | 1999 |
| Ford | E-250 ↗ | 1999 |
| Ford | ECONOLINE ↗ | 1999 |
| Ford | EXPLORER ↗ | 2002 |
Code meaning and manufacturer information
Original wording in English · Historical directory labels; manufacturer applicability has not been established for every entry.
Exhaust Gas Recirculation (EGR) Position Sensor Performance
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.