Ford Lrg425 Ecm Fault Code Chart - Genie GS-3384 Service Manual

Section 5 • Fault Codes

Ford LRG425 ECM Fault Code Chart

Code Problem
Closed Loop Multiplier
111
High (LPG)
HO2S Open/Inactive
112
(Bank 1)
HO2S Open/Inactive
113
(Bank 2)
Post-cat oxygen
114
sensor open
Closed Loop Multiplier
121
High (Gasoline)
Closed Loop Multiplier
122
Low (Gasoline)
Closed Loop Multiplier
124
Low (LPG)
133
Gasoline cat monitor
134
LPG cat monitor
135
NG cat monitor
Adaptive Lean Fault -
141
High Limit (Gasoline)
Adaptive Rich Fault -
142
Low Limit (Gasoline)
Adaptive Learn High
143
(LPG)
Adaptive Learn Low
144
(LPG)
5 - 6
Cause
Heated Oxygen Sensor wiring and/or
connections open or shorted OR sensor is faulty
OR there are vacuum leaks or exhaust leaks.
Heated Oxygen Sensor wiring and/or connections
open or shorted OR sensor is faulty.
Heated Oxygen Sensor wiring and/or connections
open or shorted OR sensor is faulty.
The post cat Heated Oxygen Sensor wiring
and/or connections are open or shorted OR
sensor is cold, non-responsive or inactive for
60 seconds or longer.
Heated Oxygen Sensor wiring and/or
connections open or shorted OR sensor is
faulty OR there are vacuum leaks or exhaust
leaks OR fuel pressure is low OR the fuel
injectors need cleaning or replacing.
MAP, IAT or ECT sensors not in correct position
OR wiring and/or connections for sensors open
or shorted OR sensor is faulty OR one or more
fuel injectors are stuck open OR there is
electro-magnetic interference from a faulty
crankshaft and/or camshaft position sensor.
Heated Oxygen Sensor wiring and/or
connections open or shorted OR sensor is
faulty OR fuel quality is poor OR fuel system
components may be faulty.
There are exhaust leaks OR the catalyst system
efficiency is below the acceptable level.
Heated Oxygen Sensor wiring and/or
connections open or shorted OR sensor is
faulty OR there are vacuum or exhaust leaks
OR one or more fuel injectors faulty or stuck
closed OR fuel quality is poor OR fuel
pressure is too low.
MAP, IAT or ECT sensors not in correct position
OR wiring and/or connections for sensors open
or shorted OR sensor is faulty OR one or more
fuel injectors are stuck closed OR there is
electro-magnetic interference from a faulty
crankshaft and/or camshaft position sensor.
Heated Oxygen Sensor wiring and/or
connections open or shorted OR sensor is
faulty OR there are vacuum leaks or exhaust
leaks OR fuel quality is poor OR fuel system
components may be faulty.
Engine wire harness may have an intermittent
short to 5V DC or 12V DC OR fuel system
components may be faulty.
GS-84 • GS-90
January 2013
Solution
Repair wiring and/or connections OR replace
sensor OR repair vacuum and exhaust leaks.
Repair wiring and/or connections OR
replace sensor.
Repair wiring and/or connections OR replace
the post cat oxygen sensor.
Repair wiring and/or connections OR replace
sensor OR repair any vacuum and exhaust leaks
OR test the fuel pressure OR clean or replace the
fuel injectors.
Adjust or replace sensors OR clean or repair
fuel injectors.
Repair wiring and/or connections OR replace
sensor OR replace fuel OR test and repair the
fuel system components.
Repair exhaust leaks OR there is an emissions
compliance issue. Contact Ford Power Products
for assistance.
Repair heated oxygen sensor wiring and/or
connections OR replace sensor OR repair
vacuum and exhaust leaks OR test the fuel
pressure OR clean or replace the fuel injectors.
Adjust or replace sensors OR clean or repair
fuel injectors.
Repair wiring and/or connections OR replace
sensor OR repair any vacuum and exhaust
leaks OR replace fuel OR test and repair the
fuel system components.
Repair short in engine wire harness
OR test and repair the fuel system
components.
Part No. 84793