Jaguar XJ (X350). Service manual — part 1122

(FVCV)
blocked/contaminated

Fuel pressure control valve

(FPCV)
blocked/contaminated

Fuel injection pump failure

Air leakage

Crankshaft position (CKP)

sensor

ECM fault

Fuel Charging and Controls Check the fuel

injection pump,

Fuel Injection Pump For air intake system,

Intake Air Distribution and Filtering Check

the CKP sensor,

Electronic Engine Controls Refer to the

warranty policy and procedures manual if

an ECM is suspect.

Difficult to start

Glow plug system fault (very

cold conditions)

Low/contaminated fuel

Fuel pump module fault

Low pressure fuel system fault

Blocked fuel filter

Fuel volume control valve

(FVCV)
blocked/contaminated

Fuel pressure control valve

(FPCV)
blocked/contaminated

Air leakage

Exhaust gas recirculation (EGR)

valve(s) fault

Check the glow plug circuits,

Glow Plug System Check the fuel

level/condition,

Fuel Charging and Controls Check the fuel

pump module operation, GO to Pinpoint

Test G552807p8.

Check the low pressure fuel system for

leaks/damage, GO to Pinpoint Test

G552807p9.

Check the fuel filter, check the FVCV and

FPCV,

Fuel Charging and Controls For air intake

system,

Intake Air Distribution and Filtering For EGR

tests,

Engine Emission Control

Rough idle

Low/contaminated fuel

Air ingress

Low pressure fuel system fault

Blocked fuel filter

Fuel volume control valve

(FVCV)
blocked/contaminated

Check the fuel level/condition,

Fuel Charging and Controls Check the low

pressure fuel system for leaks/damage, GO

to Pinpoint Test G552807p9.

Check the fuel filter, check the FVCV and

FPCV,

Fuel Charging and Controls For EGR tests,

Engine Emission Control

Fuel pressure control valve

(FPCV)
blocked/contaminated

Exhaust gas recirculation (EGR)

valve(s) fault

Lack of power

when accelerating

Air intake system fault

Catalytic converter blocked

Diesel particulate filter (DPF)

blocked

Low fuel pressure

Exhaust gas recirculation (EGR)

valve(s) fault

Turbocharger(s) fault

Check the air intake system,

Intake Air Distribution and Filtering Check

for a blocked catalytic converter or DPF,

Exhaust System Check the fuel pump

module operation, GO to Pinpoint Test

G552807p8.

For EGR tests,

Engine Emission Control For turbocharger

tests,

Turbocharger

Engine

stops/stalls

Low/contaminated fuel

Anti air suction initiated

Fuel pump module fault

Air ingress

Low pressure fuel system fault

Fuel volume control valve

(FVCV)
blocked/contaminated

Fuel pressure control valve

(FPCV)
blocked/contaminated

High pressure fuel leak

Exhaust gas recirculation (EGR)

valve(s) fault

Check the fuel level/condition,

Fuel Charging and Controls If there is

sufficient fuel check the critical fuel level

switch, GO to Pinpoint Test G552807p2.

Check the fuel pump module operation, GO

to Pinpoint Test G552807p8.

Check the low pressure fuel system for

leaks/damage, GO to Pinpoint Test

G552807p9.

Check for fuel system leaks, check the FVCV

and FPCV,

Fuel Charging and Controls For EGR tests,

Engine Emission Control

Engine judders

Low/contaminated fuel

Air ingress

Low pressure fuel system fault

Fuel volume control valve

(FVCV)

Check the fuel level/condition,

Fuel Charging and Controls Check the low

pressure fuel system for leaks/damage, GO

to Pinpoint Test G552807p9.

Check for fuel system leaks, check the FVCV

and FPCV,

Fuel Charging and Controls Check the fuel

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blocked/contaminated

Fuel pressure control valve

(FPCV)
blocked/contaminated

High pressure fuel leak

Fuel injection pump fault

injection pump,

Fuel Injection Pump

Excessive fuel

consumption

Low pressure fuel system fault

Fuel volume control valve

(FVCV)
blocked/contaminated

Fuel pressure control valve

(FPCV)
blocked/contaminated

Fuel temperature sensor leak

High pressure fuel leak

Injector(s) failure

Exhaust gas recirculation (EGR)

valve(s) fault

Check the low pressure fuel system for

leaks/damage, GO to Pinpoint Test

G552807p9.

Check the FVCV and FPCV,

Fuel Charging and Controls Check the fuel

temperature sensor, fuel injection pump,

etc for leaks,

Fuel Charging and Controls Check for

injector DTCs. For EGR tests,

Engine Emission Control

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

Description

Possible source

Action

B120200

Fuel pump module, level

sender above threshold

Fuel level float

stuck/sticking

For fuel pump module level

sender tests, GO to Pinpoint

Fuel level sender circuit:

high resistance

Fuel level sender failure

Test G552807p3.

B120400

Fuel pump module, level

sender below threshold

Fuel level float

stuck/sticking

Fuel level sender circuit:

short circuit to ground

Fuel level sender failure

For fuel pump module level

sender tests, GO to Pinpoint

Test G552807p3.

B262700

Fuel transfer pump, level

sender above threshold

Fuel level float

stuck/sticking

Fuel level sender circuit:

high resistance

Fuel level sender failure

For fuel transfer pump level

sender tests, GO to Pinpoint

Test G552807p11.

B262800

Fuel transfer pump, level

sender below threshold

Fuel level float

stuck/sticking

Fuel level sender circuit:

short circuit to ground

Fuel level sender failure

For fuel transfer pump level

sender tests, GO to Pinpoint

Test G552807p11.

B287900 Fuel transfer pump fault

Low pressure fuel bleed tap

open

Low pressure fuel system

leak

Fuel transfer pump failure

Check the status of the low

pressure fuel bleed tap, GO to

Pinpoint Test G552807p8.

Check the low pressure fuel

system for leaks, GO to

Pinpoint Test G552807p9.

Check the function of the fuel

transfer pump, GO to Pinpoint

Test G552807p5.

P008700

Fuel rail/system pressure

too low

Fuel rail pressure (FRP)

sensor disconnected

FRP sensor to ECM sensing

circuit: short circuit to
ground

FRP sensor supply circuit:

high resistance

FRP sensor failure

For FRP sensor circuit tests,

Fuel Charging and Controls

Check the fuel lines, GO to

Pinpoint Test G552807p9.

Check the fuel pressure, GO to

Pinpoint Test G552807p8.

For fuel pump module circuit

tests, GO to Pinpoint Test

G552807p4.

and GO to Pinpoint Test

G552807p6.

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