Specifications

Operation Section
-121-
752
GasPostO2FailedLean
Pre-catalyst O2 sensor
indicates extended lean
operation on LPG
(1) TurnOnMil
(2) DisableGasPost
O2Ctrl
(Certified Units Only)
Correct other faults that may contribute to 752
(e.g. faults pertaining to dither valves, Pre-Cat
O2, Post Cat O2 sensor)
Check for vacuum leaks
Check for leaks in exhaust, catalytic converter,
HEGO sensors; repair leaks.
Check all sensor connections (see fault 742
corrective actions
)
.
771
(77)
GasO2FailedRich
Pre-catalyst O2 sensor
indicates extended rich
operation on LPG
(1) TurnOnMil
(2) DisableGas
O2Ctrl
(3) DisableGasPost
O2Ctrl
(
Certified Units Onl
y)
Check dual dither valves, e.g. plugged valve or
hose.
Check for plugged orifice(s).
(*) Fault actions shown are default values specified by the OEM.