Range Rover (LP) V8-4.0L (1999)
Engine Control Module: Customer Interest
Engine Controls - MIL ON/MAF Multiple DTC's Set
No:
19/03/01/NAS
Ref:
Issue:
1
Date:
07/13/01
MIL Event from Mass Air Flow Sensor
AFFECTED VEHICLE RANGE:
Range Rover (LP)
From XA410504 - All Bosch EMS
Discovery Series II (LT)
All
SITUATION:
MIL ILLUMINATION: FAULT CODES INDICATE MASS AIR FLOW SENSOR PROBLEMS
Unfastened clips, improper sealing or incorrect filter installation can allow unfiltered air and dirt into the intake. This uncontrolled air flow can result in
MIL illumination and Mass Air Flow (MAF) adaption faults and eventually to sensor contamination.
RESOLUTION:
PROPER INSTALLATION OF FILTERS AND SEALS
Correct maintenance of the air intake system includes the replacement of the air filter in compliance with the maintenance schedule. More frequent
replacement may be required in extreme use conditions, such as deep water wading or desert driving.
Whenever the filter is replaced, careful execution of the replacement installation is required. It is particularly important that the air filter box cover and
locking clips are fitted correctly after the air filter element has been changed. It is also possible for the "O" ring seal between the air filter box and the
MAF sensor housing to be damaged during the filter change.
PARTS INFORMATION:
Range Rover
PHB102260
Air Filter Housing Assy.
Qty 1
^
ESR4238
Air Filter
Qty 1
^
PHN100220
Seal Ring
Qty 1
MHK100800
MAF Sensor Assy.
Qty 1
Discovery Series II
ESR4237
Air Filter Housing
Qty 1
^
ESR4238
Air Filter
Qty 1
^
PHN100200
Seal Ring
Qty 1
ERR7171
MAF Sensor Assy.
Qty 1
Contaminated MAF components will require replacement.
WARRANTY CLAIMS:
Claim operation times for Air Filter replacement, MAF sensor replacement and Drive Cycle "C" as appropriate.
Normal warranty policy and procedures apply.
Material allowance is included in labor operation.
REPAIR PROCEDURE
MIL INVESTIGATION AND AIR LEAK CORRECTION
1.
Investigation of a MIL event may reveal a range of faults possibly related to uncontrolled air intake:
^
Fuelling adaptions codes (P0171, P0172, P0174, P0175)