XJ (X350) V8-4.2L (2005)
Engine Control Module: All Technical Service Bulletins
Engine Controls - MIL ON/DTC P1254 Set
No.: JTB00188
Issue: 1
SECTION: 303
Engine MIL Illuminated with DTC P1254 Stored
AFFECTED VEHICLE RANGE:
CONDITION SUMMARY:
Situation:
The engine Malfunction Indicator Lamp (MIL) may be illuminated with Diagnostic Trouble Code (DTC) P1254 stored in the Engine control module
(ECM). This may be caused by the throttle limp home spring diagnostic incorrectly diagnosing a fault when there is none present.
CAUTION:
If DTC P1254 is present after performing the Repair Procedure outlined below, the ECM diagnosis of this fault is correct and must be investigated
further.
Action:
In the event of a customer concern of the above, refer to the Repair Procedure outlined below to update the ECM software.
PARTS:
No parts necessary
TOOLS:
IDS with latest DVD and Calibration Files; first available on IDS-DVD120_V6.04 Calibration File 27 Jaguar-approved Midtronics Vehicle Power
Supply
WARRANTY:
NOTE:
Repair procedures are under constant review, and therefore times are subject to change; those quoted here must be taken as guidance only. Always
refer to DDW to obtain the latest repair time.
DDW requires the use of causal part numbers. Labor only claims must show the causal part number with a quantity of zero.
Normal warranty policy and procedures apply.
REPAIR PROCEDURE