Pulled P0452 Code today!???

typicalsituations · May 30, 2004

Ever since I've had my Tahoe, the check engine light has been missing. physically gone... It used to be a Texas truck, so I figured they pulled it to pass emissions. Anyway, I pulled a P0452 code today with my code reader that I just bought. Nothing is wrong, but I would like to know whsat would cause it. I've erased it, but it comes back after a while. I know it says Evaporative Emission control system pressure sensor Low Input... Any thoughts?

asepgrad98 · May 30, 2004

do you always turn your gas cap untill it clicks 3 times?

bartlanz · May 30, 2004

His truck doesn't have that anoying problem. As in NO GAS CAP or GAS CAP LOOSE DETECTION. They didn't add that until the NBS. So strike that from the list.

typicalsituations · May 30, 2004

I just put a locking has cap on it. Its the right cap since i looked my truck up in the book they had and chose the right one. I don't know if that is the problem since I didn't have a code reader before I switched. I'll stick the old one one for a day or so and see what happens. Someone has been stealing my gas, thats why I put a locking one on there. I hope they don't start stealing again!

OUMike · May 31, 2004

Someone has been stealing my gas, thats why I put a locking one on there. I hope they don't start stealing again!

You should be aloud to shoot someone for that. I hope I catch someone tryin' to steal my gas...

typicalsituations · May 31, 2004

Yeah, I set up a camera in the back of the Tahoe with Time lapse and night vision (thanks Sony), I caught the guy next to someone elses car about 5 cars over at my apartment. You couldnt see him very well or see where he went. Funny thing is, a guy that lives a few doors down was outside one day and he went in a for a second, and I was checking my mail, I walked by his door and there was a small gas can and a makeshift siphon.... I was PISSED, but I can't prove it. I tried to get him on video up close, but He never tried it again, and to tell you the truth, I haven't seen him, OR his motorcycle in a few weeks. I wish you could shoot people for that, I would shot at him.

frdfandc · May 31, 2004

Anyway, I pulled a P0452 code today with my code reader that I just bought. I know it says Evaporative Emission control system pressure sensor Low Input... Any thoughts?

You need a sensor replaced. Basically the PCM is not getting the proper input from the sensor. I had the same code on my 2003 silverado. The dealer had to replace one of the evap system sensors.

typicalsituations · June 1, 2004

Hey, thats for the reply. Was this expensive? Actually, for you it was probably under warranty. Also, do you know if there is a negative effect to having this sensor go bad? Gas milage or something?

frdfandc · June 1, 2004

Gas mileage can be affected, possible drivability concerns can develop, but not guaranteed. I do know that most states that have emission inspections will fail a car for having the check engine light on.

typicalsituations · June 1, 2004

I looked under the truck and there is a wire hanging down from the body near the gas tank. It looks like it has four wires in it and its one of those CLIP type connectors. Its NOT a trailer light connector. It has the green rubber boot and all. I cannot find where this wire goes and I'm wondering if it has anything to do with that code.