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.

EGR valve stuck

closed, blocked

EGR valve failure

MAF sensor fault

and GO to Pinpoint Test

G552800p4.

For MAF sensor circuit tests,

Electronic Engine Controls

P040200

Exhaust gas recirculation (EGR)

excessive flow detected

EGR valve

incorrectly
fitted or loose

EGR pipe blocked

EGR valve stuck

closed, blocked

EGR valve failure

MAF sensor fault

Check pipework for restriction.

Check the mechanical function

of the throttle valve. For EGR

actuator and circuit tests, GO to

Pinpoint Test G552800p2.

and GO to Pinpoint Test

G552800p4.

For MAF sensor circuit tests,

Electronic Engine Controls

P040300

Exhaust gas recirculation (EGR)

valve H-bridges (right hand

bank)

EGR valve circuit(s):

high resistance

EGR valve circuit(s):

short circuit to
ground

EGR valve circuit(s):

short circuit to
power

EGR valve failure

ECM failure

For EGR actuator and circuit

tests, GO to Pinpoint Test

G552800p2.

Refer to the warranty policy and

procedure manual if an ECM is

suspect.

P040400

Exhaust gas recirculation (EGR)

control circuit

range/performance (right hand

bank)

IAT sensor fault

MAP sensor fault

MAF sensor fault

EGR valve stuck

closed, blocked

EGR valve circuit(s):

high resistance

EGR valve circuit(s):

short circuit to
ground

EGR valve circuit(s):

short circuit to

For IAT, MAP and MAF sensor

circuit tests,

Electronic Engine Controls For

right hand bank EGR valve and

circuit tests, GO to Pinpoint

Test G552800p2.

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power

EGR valve failure

P040500

Exhaust gas recirculation (EGR)

valve circuit low (right hand

bank)

EGR valve circuit(s):

high resistance

EGR valve circuit(s):

short circuit to
ground

EGR valve failure

For EGR sensor and circuit tests,

GO to Pinpoint Test

G552800p2.

P040600

Exhaust gas recirculation (EGR)

valve circuit high (right hand

bank)

EGR valve circuit(s):

short circuit to
power

EGR valve failure

For EGR sensor and circuit tests,

GO to Pinpoint Test

G552800p2.

P040700

Exhaust gas recirculation (EGR) -

intake air shutoff throttle circuit

low

Intake air shutoff

throttle
circuit(s): high
resistance

Intake air shutoff

throttle
circuit(s): short
circuit to
ground

Intake air shutoff

throttle failure

For intake air shutoff throttle

and circuit tests, GO to Pinpoint

Test G552800p1.

P040800

Exhaust gas recirculation (EGR) -

intake air shutoff throttle circuit

high

Intake air shutoff

throttle
circuit(s): short
circuit to power

Intake air shutoff

throttle failure

For intake air shutoff throttle

and circuit tests, GO to Pinpoint

Test G552800p1.

P048700

Exhaust gas recirculation (EGR)

valve H-bridges (left hand bank)

EGR valve circuit(s):

high resistance

EGR valve circuit(s):

short circuit to
ground

EGR valve circuit(s):

short circuit to
power

EGR valve failure

For EGR sensor and circuit tests,

GO to Pinpoint Test

G552800p4.

Refer to the warranty policy and

procedure manual if an ECM is

suspect.

ECM failure

P133400

Exhaust gas recirculation (EGR) -

intake air shutoff throttle

minimum/maximum stop

performance

EGR valve

stuck/sticking

EGR valve circuit(s):

high resistance

EGR valve circuit(s):

short circuit to
ground

EGR valve circuit(s):

short circuit to
power

Intake air shut off

throttle
stuck/sticking

Intake air shut off

throttle
circuit(s): high
resistance

Intake air shut off

throttle
circuit(s): short
circuit to
ground

Intake air shut off

throttle
circuit(s): short
circuit to power

Intake air shut off

throttle failure

ECM failure

For intake air shutoff throttle

and circuit tests, GO to Pinpoint

Test G552800p1.

For EGR actuator and circuit

tests, GO to Pinpoint Test

G552800p2.

and GO to Pinpoint Test

G552800p4.

Refer to the warranty policy and

procedure manual if an ECM is

suspect.

P140A00

Exhaust gas recirculation (EGR)

valve circuit low (left hand bank)

EGR valve circuit(s):

high resistance

EGR valve circuit(s):

short circuit to
ground

EGR valve failure

For EGR actuator and circuit

tests, GO to Pinpoint Test

G552800p4.

P140B00 Exhaust gas recirculation (EGR)

valve circuit high (left hand

EGR valve circuit(s):

short circuit to

For EGR actuator and circuit

tests, GO to Pinpoint Test

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