Jaguar XJ (X350). Manual — part 897

Exhaust leak

Catalyst efficiency decrease

Low exhaust temperature

Injector flow partially

blocked

P0137

Right-hand catalyst

monitor sensor sensing

circuit low voltage

Catalyst monitor sensor

disconnected

Catalyst monitor sensor to

ECM wiring open circuit

Catalyst monitor sensor

short circuit to ground

Catalyst monitor sensor

failure

For catalyst monitor sensor

tests, GO to Pinpoint Test

G258127p8.

P0138

Right-hand catalyst

monitor sensor sensing

circuit high voltage

Catalyst monitor sensor

sensing circuit short
circuit to high voltage

Catalyst monitor sensor

ground braided shield
open circuit

Catalyst monitor sensor

failure

For catalyst monitor sensor

tests, GO to Pinpoint Test

G258127p8.

P0140

Right-hand catalyst

monitor sensor sensing

circuit no activity

Catalyst monitor sensor

disconnected

Catalyst monitor sensor

mechanical damage

Catalyst monitor sensor to

ECM wiring open circuit

Catalyst monitor sensor

sensing circuit short
circuit to high voltage

Catalyst monitor sensor RH

short circuit to ground

Catalyst monitor sensor

ground braided shield
open circuit

Inspect the HO2S for

connection/damage. For HO2S

sensor diagnosis, GO to Pinpoint

Test G258127p8.

Check for exhaust leak, for

further information,

Exhaust temperature will be low

if misfire/poor fuel supply

condition exists. Catalytic

converter efficiency will be poor

until it reaches "light-off".

Exhaust leak

Low exhaust temperature

Catalyst monitor sensor

failure

P0151

Left-hand H02S sensing

circuit low current

(universal oxygen sensor;

lean condition at ECM -

high current at sensor)

H02S disconnected

H02S to ECM variable

current circuit fault
(HO2S pin 3)

ECM to HO2S constant

current circuit fault
(HO2S pin 4)

H02S failure

For HO2S tests, GO to Pinpoint

Test G258127p10.

P0152

Left-hand H02S sensing

circuit high current

(universal oxygen sensor;

rich condition at ECM -

low current at sensor)

H02S disconnected

H02S to ECM variable

current circuit fault
(HO2S pin 3)

ECM to HO2S constant

current circuit fault
(HO2S pin 4)

H02S failure

For HO2S tests, GO to Pinpoint

Test G258127p10.

P0153

Left-hand H02S sensing

circuit slow response

Engine misfire

H02S disconnected

H02S mechanical damage

H02S to ECM wiring fault

H02S short circuit to ground

H02S to ECM wiring shield

open circuit

HO2S heater circuit fault

H02S failure

Exhaust leak

Catalyst efficiency decrease

Check for associated codes

related to misfire, (P0300 to

P0308) inspect the HO2S for

connection/damage. For HO2S

sensor tests, GO to Pinpoint

Test G258127p10.

Check for exhaust leak, for

further information,

Exhaust temperature will be low

if misfire/poor fuel supply

condition exists. Catalytic

converter efficiency will be poor

until it reaches "light-off".

www.

Low exhaust temperature

Injector flow partially

blocked

P0157

Left-hand catalyst

monitor sensor sensing

circuit low voltage

Catalyst monitor sensor

disconnected

Catalyst monitor sensor to

ECM wiring open circuit

Catalyst monitor sensor

short circuit to ground

Catalyst monitor sensor

failure

For catalyst monitor sensor

tests, GO to Pinpoint Test

G258127p14.

P0158

Left-hand catalyst

monitor sensor sensing

circuit high voltage

Catalyst monitor sensor

sensing circuit; short
circuit to high voltage

Catalyst monitor sensor

ground braided shield
open circuit

Catalyst monitor sensor

failure

For catalyst monitor sensor

tests, GO to Pinpoint Test

G258127p14.

P0160

Left-hand catalyst

monitor sensor sensing

circuit no activity

Catalyst monitor sensor

disconnected

Catalyst monitor sensor

mechanical damage

Catalyst monitor sensor to

ECM wiring open circuit

Catalyst monitor sensor

sensing circuit short
circuit to high voltage

Catalyst monitor sensor LH

short circuit to ground

Catalyst monitor sensor

ground braided shield
open circuit

Exhaust leak

Low exhaust temperature

Catalyst monitor sensor

Inspect the HO2S for

connection/damage. For HO2S

sensor diagnosis, GO to Pinpoint

Test G258127p14.

Check for exhaust leak, for

further information,

Exhaust temperature will be low

if misfire/poor fuel supply

condition exists. Catalytic

converter efficiency will be poor

until it reaches "light-off".

failure

P0171

Right-hand cylinders

combustion too lean

Air intake leak between

mass air flow (MAF)
sensor and cylinder
head

Fuel injector restriction

Fuel filter/system restriction

Low fuel pump output

Fuel pressure (IP) sensor

failure (low fuel
pressure)

HO2S/Catalyst monitor

sensor harness wiring
condition fault

Fuel temperature (EFT)

sensor fault (low fuel
temperature)

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, IP, EFT,
TP

For intake system,

Intake Air Distribution and

Filtering - VIN Range: G00442-

>G45703 For fuel injector,

Fuel Charging and Controls - VIN

Range: G00442->G45703

Fuel Charging and Controls - VIN

Range: G00442->G45703 For

fuel filter and pump,

Fuel Tank and Lines - 4.2L NA V8

- AJV8/4.2L SC V8 - AJV8/3.0L NA

V6 - AJ27/3.5L NA V8 - AJV8, VIN

Range: G00442->G45703 For

fuel pressure sensor,

Fuel Charging and Controls - VIN

Range: G00442->G45703

Fuel Charging and Controls - VIN

Range: G00442->G45703 For

HO2S/Catalyst monitor sensor

tests, GO to Pinpoint Test

G258127p6.

GO to Pinpoint Test G258127p9.

GO to Pinpoint Test G258127p8.

For exhaust system,

Refer to individual pinpoint tests

for sensors listed. * 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)

Fuel pressure (IP) sensor

failure (high fuel
pressure)

Fuel temperature (EFT)

sensor fault (high fuel
temperature)

MAF sensor fault (high

Check for "misfire detected"

DTCs (P0300 to P0308) in this

section. For intake system,

Intake Air Distribution and

Filtering - VIN Range: G00442-

>G45703 For fuel injectors, fuel

pressure sensor,

Fuel Charging and Controls - VIN

Range: G00442->G45703

Fuel Charging and Controls - VIN

Range: G00442->G45703 Refer

to individual pinpoint tests for

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