Jaguar XJ (X350). Manual — part 636

MAF sensor

Purge valve

Fuel pump

Ignition system

ECT sensor

EGR valve stuck open

Evaporative Emissions - VIN Range:

G00442->G45703 Check fuel

pressure.

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For

ignition system,

Engine Ignition - VIN Range: G00442-

>G45703 For ECT sensor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 For EGR

information,

Engine Emission Control - VIN Range:

G00442->G45703

Engine stalls soon after

start

Breather system

disconnected/restricted

ECM relay

Harness

MAF sensor

ECT sensor

Ignition system

Air filter restricted

Fuel lines

Fuel Rail Pressure (FRP)

sensor

Air leakage

For breather system,

Engine Emission Control - VIN Range:

G00442->G45703 For ECM relay,

MAF sensor and ECT sensor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 For ignition

system,

Engine Ignition - VIN Range: G00442-

>G45703 For air filter information,

Intake Air Distribution and Filtering -

VIN Range: G00442->G45703 For fuel

line information,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For FRP

sensor tests, GO to Pinpoint Test

G290117p2.

For intake system information,

Intake Air Distribution and Filtering -

VIN Range: G00442->G45703

Engine hesitates/poor

acceleration

Fuel pump

Injector leak

Fuel pressure

Fuel lines

Air leakage

Throttle sensors

Check fuel pressure.

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For FRP

sensor tests, GO to Pinpoint Test

G290117p2.

For fuel line information,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For

intake system,

Intake Air Distribution and Filtering -

VIN Range: G00442->G45703 For

Throttle motor

Ignition system

EGR system

HO2 sensors

Transmission malfunction

Restricted pedal travel

(carpet, etc)

APP sensor

throttle position sensor and throttle

motor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 For ignition

system,

Engine Ignition - VIN Range: G00442-

>G45703 For EGR system,

Engine Emission Control - VIN Range:

G00442->G45703 Check for DTCs

relating to HO2 sensors. Refer to the

DTC index for pinpoint tests. For

transmission information,

Check accelerator pedal travel. For

APP sensor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703

Engine backfires

Fuel pump

Fuel lines

Air leakage

MAF sensor

HO2 sensors

Ignition system

Sticking VCT hub

APP sensor

Check fuel pressure.

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For fuel

line information,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For

intake system,

Intake Air Distribution and Filtering -

VIN Range: G00442->G45703 For

MAF sensor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 Check for

DTCs relating to HO2 sensors. Refer

to the DTC index for pinpoint tests.

For ignition system,

Engine Ignition - VIN Range: G00442-

>G45703 For VCT information,

Engine For APP sensor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703

Engine surges

Fuel pump

Fuel lines

MAF sensor

Check fuel pressure.

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For fuel

line information,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For

MAF sensor, throttle sensor, and

www.

Harness

Throttle sensors

Throttle motor

Ignition system

throttle motor relay tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 For ignition

system,

Engine Ignition - VIN Range: G00442-

>G45703

Engine detonates/knocks

KS/circuit malfunction

Fuel pump

Fuel lines

FRP sensor

MAF sensor

HO2 sensors

Air leakage

Sticking VCT hub

BARO sensor malfunction

For KS circuit tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 Check fuel

pressure. For fuel line information,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G00442->G45703 For FRP

sensor tests, GO to Pinpoint Test

G290117p2.

. For MAF and HO2 sensor tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 For intake

system,

Intake Air Distribution and Filtering -

VIN Range: G00442->G45703 Check

DTCs for VCT range/performance

fault. For VCT information,

Engine For BARO sensor, contact

dealer technical support for advice on

possible ECM failure.

No throttle response

APP sensor malfunction

Throttle sensors

Throttle motor

For APP sensor, throttle position

sensor and throttle motor relay tests,

Electronic Engine Controls - VIN

Range: G00442->G45703

Poor throttle response

APP sensor malfunction

Throttle sensors

ECT sensor

MAF sensor

Transmission malfunction

Traction control event

Air leakage

For APP sensor, throttle position

sensor, ECT sensor and MAF sensor

tests,

Electronic Engine Controls - VIN

Range: G00442->G45703 For

transmission information,

For intake system,

Intake Air Distribution and Filtering -

VIN Range: G00442->G45703 For

breather system information,

Engine Emission Control - VIN Range:

G00442->G45703

Breather system

disconnected/restricted

Diagnostic Trouble Code (DTC) index

DTC

Condition

Possible Causes

Action

P0171

Right-hand cylinders

combustion too lean

Air intake leak between mass

air flow (MAF) sensor and
cylinder head

Fuel filter/system restriction

Fuel injector restriction

FRP sensor fault (low fuel

pressure)

Low fuel pump output

HO2S/Catalyst monitor sensor

harness wiring condition
fault

EFT sensor fault (low fuel

temperature)

Mass air flow (MAF) sensor

fault (low intake air flow)

Exhaust leak (before catalyst)

ECM receiving incorrect signal

from one or more of the
following sensors: ECT,
MAF*, IAT, FRP, fuel rail
temperature, TP

For intake system,

Intake Air Distribution

and Filtering - VIN Range:

G00442->G45703 For

fuel injector information,

Fuel Injectors (18.10.02)

For fuel filter and pump,

Fuel Tank and Lines -

3.0L/3.5L/4.2L, VIN

Range: G00442-

>G45703 For FRP sensor

tests, GO to Pinpoint

Test G290117p2.

For HO2S/catalyst

monitor sensor tests,

Electronic Engine

Controls - VIN Range:

G00442->G45703 For

exhaust system,

For sensor tests,

Electronic Engine

Controls - VIN Range:

G00442->G45703 * If

this DTC is flagged, pay

particular attention to

the MAF sensor.

P0172

Right-hand cylinders

combustion too rich

Engine misfire

Restricted air filter

Leaking fuel injector(s)

FRP sensor failure (high fuel

pressure)

Engine fuel temperature (EFT)

sensor fault (high fuel

Check for "misfire

detected" DTCs in this

section. For intake

system,

Intake Air Distribution

and Filtering - VIN Range:

G00442->G45703 For

fuel injector information,

Fuel Injectors (18.10.02)

For FRP sensor tests, GO

to Pinpoint Test

www.