When Monitored

This Diagnostic Runs Continuously When The Following Conditions Are Met:

Single Tank System:

With The Engine Running For More Than Two Minutes.
After The Pcm Decides That A Calibrated Amount Of Fuel Should Have Been Consumed (Between Approximately One And Five Gallons Depending On Initial Fuel Level).
- This Is Determined By The Accumulated Amount Of Fuel Injected Into The Engine Through The Fuel Injectors.

Saddle Tank System:

The Primary Level Rationality Diagnostic Runs When The Fuel Level Sensor 2 (Secondary) Is Reading Empty.
The Secondary Level Rationality Diagnostic Runs When The Fuel Level Sensor 1 (Primary) Is Reading Full.

Dual Tank System:

The Primary Level Rationality Diagnostic Functions The Same As The Single Tank System.
The Secondary Level Rationality Diagnostic Runs When A Fuel Transfer Event Is Occurring.

Set Conditions For Single Tank Vehicles:

If The Pcm Does Not See A Change In Fuel Level Of Greater Than 0.06 Volts After The Calibrated Amount Of Fuel Should Have Been Consumed The Diagnostic Will Fail.

Set Conditions For Saddle Tank Vehicles:

Primary Fault (P0461) - If The Pcm Does Not See A Change In Fuel Level Sensor 1 Of Greater Than 0.06 Volts After The Calibrated Amount Of Fuel Should Have Been Consumed The Diagnostic Will Fail.
Secondary Fault (P2066) - If The Pcm Does Not See A Change In Fuel Level Sensor 2 Of Greater Than 0.06 Volts After The Calibrated Amount Of Fuel Should Have Been Consumed The Diagnostic Will Fail.

Set Conditions For Dual Tank Vehicles:

Primary Fault (P0461) - If The Pcm Does Not See A Change In Fuel Level Of Greater Than 0.06 Volts After The Calibrated Amount Of Fuel Should Have Been Consumed The Diagnostic Will Fail.
Secondary Fault (P2066) - No Change In Fuel Level Sensor 2 Circuit Voltage After A Significant Amount Of Fuel Should Have Been Transferred From The Auxiliary Fuel Tank To The Primary Fuel Tank.

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