Jaguar XJ (X350). Manual - part 790
open
DTCs.
Excessive fuel
consumption
EGR valve stuck
open
Inspect the system (see visual inspection). Check for
DTCs.
Excessive black smoke
EGR valve stuck
open
Inspect the system (see visual inspection). Check for
DTCs.
Excessive emissions
EGR system not
operating
Inspect the system (see visual inspection). Check for
DTCs.
Loud 'ticking' noise
with engine running
EGR pipes cracked
Closely inspect the pipes for cracks (particularly at the
corrugated sections).
Excessive blow-by
Crankcase
ventilation system
restricted
Inspect the hoses. Check each hose for
restriction/blockage by gently blowing through. Check
for blockage of the separator.
Engine oil leaks
Crankcase
ventilation system
restricted
Inspect the hoses. Check each hose for
restriction/blockage by gently blowing through. Check
for blockage of the separator.
DTC index
NOTE:
Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5
digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last
2 digits give extra information read by the manufacturer-approved diagnostic system).
NOTE:
For a full list of powertrain DTCs,
Electronic Engine Controls
DTC
Condition
Possible source
Action
P040100
Exhaust gas recirculation (EGR)
insufficient flow detected
EGR valve
incorrectly
fitted or loose
EGR pipe blocked
Check pipework for restriction.
Check the mechanical function
of the throttle valve. For EGR
actuator and circuit tests, GO to
Pinpoint Test G552800p2.