Error Codes - 2007 4Runner Sport V6

[jayhawkbrandon]

All,

Yesterday when I started my car in cold weather the check engine, VSC, and a few others lights popped on. My 2007 4Runner Sport is still driving fine with no noticeable issues. I went to the local car parts store to have the codes read and did some initial research online. I'm posting here because the combination of three codes that I'm seeing doesn't seem to be a common issue. Here is what I've got:

1) C1201 - Engine Control System Malfunction
2) P0441 - Evaporate Emissions
OBD-II Trouble Code: P0441 Evaporative Emission Control System Incorrect Purge Flow
3) P0455 - Emissions again
OBD-II Trouble Code: P0455 Evaporative Emission Control System Leak Detected (no purge flow or large leak)

I tried tightening the gas cap as recommended on a few posts about the "p" codes, but the lights are still on. I don't have a code checker to reset the codes to test it. Would leaving the battery unhooked for a while be a good option here?

Has anyone seen these three in combination? The C1201 seems to be the code that is out of place. Unfortunately, I can't take it to the dealer this week because of work hours, so I need to make sure that I am good to drive until at least next week.

Thanks.

 

[CXS]

You might want to try a new gas cap, evaporative errors are frequently caused by a bad one failing to maintain pressure. Getting rid of the 2 evaporative codes may clear the other. Disconnecting the battery will usually reset the ECU.

 

[jayhawkbrandon]

You might want to try a new gas cap, evaporative errors are frequently caused by a bad one failing to maintain pressure. Getting rid of the 2 evaporative codes may clear the other. Disconnecting the battery will usually reset the ECU.

Thanks for your help. I'll give this a shot.

 

[BlackWorksInc]

Those codes can indicate a gas cap, particularly the P0455, the purge flow code can also be triggered as a result. I'm more curious about the C1201 as that's not a common code to pop for gas cap related issues and makes me more inclined to check other things, but you said you don't have a lot of diagnostic equipment to test the vehicle with so for now I'd replace the cap and see what comes back and go from there.

 

[jayhawkbrandon]

For anyone who finds this thread while trying to solver their problem, the new gas cap fixed my problem. I bought a generic $14 gas cap from O'Reilly, replaced it, and then left the negative terminal off of my battery for a few hours. No issues upon restart.

Thanks for the tips guys.

 

[BlackWorksInc]

For anyone who finds this thread while trying to solver their problem, the new gas cap fixed my problem. I bought a generic $14 gas cap from O'Reilly, replaced it, and then left the negative terminal off of my battery for a few hours. No issues upon restart.

Thanks for the tips guys.

Give it a couple days before you call it fixed. EVAP monitors can take up to a week to complete. We have to warn customers who bring cars in for EVAP problems all the time about that.