Range Rover P38
LAND ROVER V8
55
DESCRIPTION AND OPERATION
Diagnosis of electrical faults is continually monitored
by the ECM in both the upstream sensors and
downstream sensors (NAS only). The sensor signal is
checked against stored minimum and maximum
threshold values equating to short and open circuit
conditions.
If an HO
2
S sensor should fail, the following fault codes
will be generated by the ECM diagnostics, which can
be retrieved by Testbook:
•
P1129 - Front heated oxygen sensors
transposed
Upstream sensor LH bank - electrical (NAS only)
•
P0130 - Stoichiometric ratio outside operating
band
•
P0132 - Short circuit to battery supply
•
P0134 - Open circuit
Downstream sensor LH bank - electrical
•
P0136 - Stoichiometric ratio outside operating
band
•
P0137 - Short circuit to battery supply
•
P0138 - Short circuit to ground or chemical shift
down
•
P0140 - Open circuit
Upstream sensor RH bank - electrical (NAS only)
•
P0150 - Stoichiometric ratio outside operating
band
•
P0152 - Short circuit to battery supply
•
P0154 - Open circuit
Downstream sensor RH bank - electrical
•
P0156 - Stoichiometric ratio outside operating
band
•
P0157 - Short circuit to ground
•
P0158 - Short circuit to battery voltage
•
P0160 - Open circuit
Upstream sensors aged (NAS only)
•
P0133 - Upstream sensor aged - Period time too
short LH bank
•
P0133 - Upstream sensor aged - Period time too
long LH bank
•
P0153 - Upstream sensor aged - Period time too
short RH bank
•
P0153 - Upstream sensor aged - Period time too
long RH bank
•
P1170 - Upstream sensor aged - ATV adaption
too lean LH bank
•
P1170 - Upstream sensor aged - ATV adaption
too rich LH bank
•
P1173 - Upstream sensor aged - ATV adaption
too lean RH bank
•
P1173 - Upstream sensor aged - ATV adaption
too rich RH bank
Sensor Heater faults
•
P0135 - Upstream heater LH bank - Short circuit
(NAS only)
•
P0135 - Upstream heater LH bank - Open circuit
(NAS only)
•
P0141 - Downstream heater LH bank - Short
circuit
•
P0141 - Downstream heater LH bank - Open
circuit
•
P0155 - Upstream heater RH bank - Short circuit
(NAS only)
•
P0155 - Upstream heater RH bank - Open circuit
(NAS only)
•
P0161 - Downstream heater LH bank - Short
circuit
•
P0161 - Downstream heater LH bank - Open
circuit
