UA7TypeS

Hello Acura family, I just recently replaced my purge valve on my 08 tl type s (about 70k on the odo) myself after getting the "tighten fuel cap" message repeatedly. I thought replacing the purge valve would get rid of the message but after driving it around a couple miles the message popped back up but this time with the check engine light my screen showed a "p145c" code which is a code for low purge valve flow. I double checked the hoses and the valve to see if everything was on correctly and i didn't see a problem so i unhooked the negative charge on my battery to clear the CEL in hopes of it not coming back but it popped back up after driving to school this morning. Any idea what the issue may be or how to get rid of the CEL? I'd really appreciate the feedback.

Mjftls

I have same issue on my 07 TL-S. Started with tighten fuel cap then to CEL with two codes P145C, P0497. Started with replacement with non OEM canister valve with no luck. Dealer thinks I may have over filled gas and filled up outer sleeve of filler pipe. Don't know if I agree with them and am hoping to tackle this myself. Any ideas?

thoiboi

Go OEM

truonghthe

I bought my new from Delray Acura, since then I put 30k miles on it and didn't see the tighten gas cap message again.

WDPanda

mine did the same thing. A Used purge valve solved the issue. Your replacement may be faulty. My replacement was made in Japan.

nanxun

Just experiencing the "tighten fuel cap" warning myself and looking into the issue. Wondering if your CEL might indicate a problem that goes beyond the EVAP purge valve itself--like the sensor?

Here's a more in depth YouTube vid on diagnosis starting with a CEL. Hope it helps and that your problem is resolved soon!

youraway

Would like to have sen the results after the valve was replaced. Which direction should the air flow when the valve is working correctly?

youraway

A defective purge valve will cause the TFC message. I found that the electrical connector for the valve if left disconnected will trigger a CEL. When reconnected the CEL goes away, but if the valve is defective the TFC message will reappear. I replaced the valve and disconnected and reconnected the battery, it cleared the TFC message and it has not reappeared.