Range Rover P38
ZF AUTO
23
DESCRIPTION AND OPERATION
Fault effects and warning indications - Petrol vehicles from 99MY
Fault code
OBDll
(TestBook)
Fault description
Effect
MIL
Warning
lamp
’GEARBOX
FAULT’
message
P0705
(14, 23)
* Gear position switch,
incorrect outputs
Maintains current gear in low range,
limp home mode in high range. Shift
pressure to maximum, harsh gear
shifts/engagement.
On
Yes
P7021
(21)
* Downshift safety
monitor prevented
downshift which would
have caused engine
overspeed
Maintains current gear in low range,
limp home mode in high range. Shift
pressure to maximum, harsh gear
shifts/engagement.
On
Yes
P0722
(22)
* Torque converter
slipping
Maintains current gear in low range,
limp home mode in high range. Shift
pressure to maximum, harsh gear
shifts/engagement.
On
Yes
P0731
(29)
* Ratio monitoring,
implausible 1st gear
ratio
No apparent effect.
On
No
P0732
(30)
* Ratio monitoring,
implausible 2nd gear
ratio
No apparent effect.
On
No
P0733
(31)
* Ratio monitoring,
implausible 3rd gear
ratio
No apparent effect.
On
No
P0734
(32)
* Ratio monitoring,
implausible 4th gear
ratio
No apparent effect.
On
No
P0741
(5)
* Torque converter
lock-up clutch fault
May affect driveability.
On
No
P0743
(7, 25)
* Torque converter
lock-up solenoid
(MV 3), open or short
circuit
Limp home mode in low and high
ranges. Shift pressure to maximum,
harsh gear shifts/engagement.
On
Yes
P0748
(10, 28)
* Pressure regulating
solenoid (MV 4), open
or short circuit
Limp home mode in low and high
ranges. Shift pressure to maximum,
harsh gear shifts/engagement.
On
Yes
P0753
(8, 26)
* Shift solenoid
(MV 1), open or short
circuit
Limp home mode in low and high
ranges. Shift pressure to maximum,
harsh gear shifts/engagement.
On
Yes
*= Emissions (OBDll) relevant
†= MIL illuminates immediately (in all other faults, MIL on illuminates in the 2nd consecutive drive cycle if the fault
is still present)
