I have been battling an intermittent "Tighten Fuel Cap" message since we bought our 07 about 5 months/7,000 miles ago. In the beginning it would eventually trigger a P0455/P0456 check engine light. I replaced the purge valve solenoid and the gas cap with Honda OEM parts and checked all of the lines (they were good), and with the exception of not threading in the gas cap properly and forgetting to hook up a hose after adjusting the valves, no messages or lights had come back to haunt me.
After filling up the tank this past Sunday, the "Tighten Fuel Cap" message came back up. When I got home I check to see if I screwed up the threading of the gas cap and I had not. After cycling the ignition a few times, the message went away. Drove it for about 10 miles and I was then bathed in the warm amber glow of the check engine light.
This time the codes were P145C and P0497. Thinking the purge valve solenoid may have checked out prematurely, I took a look at the live data and it showed the EVAP PCT(%) operating normally depending on the load of the engine. I cleared the codes and they stayed gone for about 30 miles then reappeared. I cleared them again, let the van sit overnight, then they reappeared this morning (before up to operating temp) within about 5 miles. I again cleared them, and they stayed gone.
Driving here a few minutes ago, the Tighten Fuel Cap message came on again, but no CEL. I read the pending codes and it is showing a P145C pending. I cleaned the mating surfaces of the gas cap/filler neck since they were looking a little black, cycled the ignition a few times, but the Tighten Fuel Cap message is still there with the P145C pending.
I am sure it is only a matter of time before the P145C comes back on. Based on my research, that code is pointing to the EVAP canister that is under the drivers side of the vehicle.
Before I plunk down $140 or so on a new one, does anyone have any thoughts or other things I should check first?
After filling up the tank this past Sunday, the "Tighten Fuel Cap" message came back up. When I got home I check to see if I screwed up the threading of the gas cap and I had not. After cycling the ignition a few times, the message went away. Drove it for about 10 miles and I was then bathed in the warm amber glow of the check engine light.
This time the codes were P145C and P0497. Thinking the purge valve solenoid may have checked out prematurely, I took a look at the live data and it showed the EVAP PCT(%) operating normally depending on the load of the engine. I cleared the codes and they stayed gone for about 30 miles then reappeared. I cleared them again, let the van sit overnight, then they reappeared this morning (before up to operating temp) within about 5 miles. I again cleared them, and they stayed gone.
Driving here a few minutes ago, the Tighten Fuel Cap message came on again, but no CEL. I read the pending codes and it is showing a P145C pending. I cleaned the mating surfaces of the gas cap/filler neck since they were looking a little black, cycled the ignition a few times, but the Tighten Fuel Cap message is still there with the P145C pending.
I am sure it is only a matter of time before the P145C comes back on. Based on my research, that code is pointing to the EVAP canister that is under the drivers side of the vehicle.
Before I plunk down $140 or so on a new one, does anyone have any thoughts or other things I should check first?
