P0440 = EVAP System Malfunction

[ToddM1]

I received this code on my 2000 Rodeo. I didn't put the gas cap on last time correctly.

The car runs fine. I put the gas cap on correctly and disconnected the battery, but the light is still on.

The freeze frame they gave me says "Mass Air flow 0.0 grams at 55 mph". Not sure what that means.

Should I have the code deleted and see if it comes back? Thanks

[txsoulfly]

Check for the following conditions:


1.Cracked or punctured EVAP canister.

2.Damaged or disconnected source vacuum line, EVAP purge line, vent hose or fuel tank vapor line.

3.Poor connection at PCM - Inspect harness connectors for backed-out terminals, improper mating, broken locks, improperly formed or damaged terminals, and poor terminal to wire connection.

4.Damaged harness-Inspect the wiring harness to the EVAP canister vent solenoid, EVAP canister purge solenoid and the fuel tank pressure sensor for an intermittent open or short circuit.

5.Kinked, pinched, or plugged vacuum source, EVAP purge, or fuel tank vapor line-Verify that the lines are not restricted. Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

[amigo-2k]

I posted a request for help finding a TSB on this (there is a TSB on this code) on another board.

This is the 3rd Isuzu owner in 3 weeks that has posted this same problem (but this is the first time I have read about them).