XJ-S Convertible (XJ27) L6-4.0L (1996)
/l6-4.0l/Page-709001.png)
EGR Valve: All Technical Service Bulletins
EGR Valve - DTCs P0400, P1400, and P1401 EGR
05.1-26
Sedan Range
DATE
6/97 Amended 3/99
MODEL
1995-97 MY Sedan (4.0L) Range
VIN
NA 720001-792000
SC 774096-792000
EGR Valve Sticking/Fails to Close - Revised EGR Valve
ISSUE:
A revised EGR valve (part no. LHE 1550AB) was introduced as a running change from VIN 792000 approximately. The revised valve, Illustration 1,
can be identified by the date code 24862A or later (2486 indicates the 248th day of 1996.) The valve has a revised pintle design that helps prevent
sticking to solve concerns with rough idling.The following Diagnostic Trouble Codes may be present:
^
DTC P0400 - EGR temperature sensor circuit malfunction
^
DTC P1400 - EGR valve position malfunction
^
DTC P1401 - EGR valve position circuit out of range (high or low voltage)
ACTION:
When diagnosing a customer complaint on a 1995-97 MY Sedan Range (NA) or 1996-97 MY XJR (SC) vehicle within the above VIN range that
exhibits the above concerns and/or DTCs, proceed as described:
1.
Verify the presence of the EGR DTCs on the previous page and clear them.
2.
Remove the EGR valve and gasket.
3.
Check the EGR pipes for loose carbon and blow out, if necessary.
NOTE:
Do not attempt to remove carbon by scraping. Scraping can cause the carbon deposit to come loose in the future, causing the replacement valve to
stick or remain open.
NOTE:
