1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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17,255 Posts
It can be contaminated fuel (water?) or it can be a very small exhaust leak or engine mechanical or O2 sensors/circuits.
P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F, altitude below 8500 ft and fuel level greater than 15%.
Set Condition: If the PCM adds downstream short term compensation to long term
adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the
MIL illuminates and a trouble code is stored.
P2098-DOWN STREAM FUEL SYSTEM 2/2 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F, altitude below 8500 ft and fuel level greater than 15%.
Set Condition: If the PCM adds downstream short term compensation to long term
adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the
MIL illuminates and a trouble code is stored
POSSIBLE CAUSES:
EXHAUST LEAK
ENGINE MECHANICAL PROBLEM
O2 SENSOR
O2 SIGNAL CIRCUIT
O2 RETURN CIRCUIT
FUEL CONTAMINATION
P2096-DOWN STREAM FUEL SYSTEM 1/2 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F, altitude below 8500 ft and fuel level greater than 15%.
Set Condition: If the PCM adds downstream short term compensation to long term
adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the
MIL illuminates and a trouble code is stored.
P2098-DOWN STREAM FUEL SYSTEM 2/2 LEAN
When Monitored: With the engine running in closed loop mode, the ambient/battery
temperature above (-7°C)20°F, altitude below 8500 ft and fuel level greater than 15%.
Set Condition: If the PCM adds downstream short term compensation to long term
adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the
MIL illuminates and a trouble code is stored
POSSIBLE CAUSES:
EXHAUST LEAK
ENGINE MECHANICAL PROBLEM
O2 SENSOR
O2 SIGNAL CIRCUIT
O2 RETURN CIRCUIT
FUEL CONTAMINATION