98 taurus: P1000 & P1408 code

[la-z-boy]

My 1998 Taurus has 160k miles, CHECK ENGINE light came on, i check codes and computer showed two of them: P1000 and P1408. Can somebody help me?

[way2old]

The P1000 means the vehicle has not completed all monitors on a drive cycle. The P1408 is for EGR out of test range. The EGR is a monitor the computer checks on each drive cycle. Cure the P1408 and the P1000 will clear itself.

[la-z-boy]

How I should fix that EGR (P1408) problem?

[way2old]

Here are some things to check per Ford Manual for the P1408: Start at the first thing and work your way to the bottom. The test itself is about 10 pages long and I cannot post the entire test procedure.

HE71 DTC P1408: RETRIEVE CONTINUOUS MEMORY DTCS
Diagnostic Trouble Code (DTC) P1408 indicates that Key On Engine Running (KOER) Self-Test has detected EGR flow out of range.

Possible causes:

Fault in vacuum supply to EGR vacuum regulator solenoid.
EGR valve stuck closed or iced.
EGR valve diaphragm leaks.
EGR valve or flow path restricted.
EGR vacuum hose off, plugged or leaks.
VPWR circuit open to EGR vacuum regulator solenoid.
EGRVR circuit to PCM open.
EGRVR circuit to PCM shorted to PWR.
Differential Pressure Feedback EGR (D.P.F. EGR) sensor pressure hoses both improperly connected.
D.P.F. EGR sensor pressure hoses reversed.
D.P.F. EGR sensor VREF circuit open.
Improper downstream pressure hose connection.
Downstream pressure hose plugged.
Damaged orifice tube assembly.
Damaged EGR vacuum regulator solenoid.
Damaged D.P.F. EGR sensor.
Damaged PCM.