This is 3 of 3 videos regarding the above listed trouble codes for a 99 s10 2.2l 5spd. Video 2: • P0440 p0452 p0453 trou... Video 1: • P0452 p0453 p0440 trou...
p0452 I have this code replaced 2 fuel tank pressure sensors...one was used but knew was working then put new one in.. I cant find a leak. I can drive the car let it idle doesnt come back. Drive the car 25 mles and randomly comes back.. Checked the plug to the sensor. The voltage seems fine. P0452 Evaporative Emission Control System Pressure Sensor Low Input. The little cheap scanners all say its just a Fuel pressure sensor. I do notice there seems to be no pressure when I release the gas cap and have tried and extra one I had and that didnt make a difference either. My cheapo Obd2 code reader does have live datea and freeze frame but no rhyme or reason to that...Some times it throws the code at idle after drive for 10 miles other times going 30 mph and higher rpm...I was wondering if the evap purge valve solenoid gets stuck open sometimes...I did test it and heard it clicking and getting the vacuum. I dont want to throw parts at it but inspection is this month and my State you cant have that dumb code.. Makes no sense...I dont smell gas..cant find a leak. Gas mileage seems totally fine...The car runs really well for the age.
Sorry for the late response, just now seeing it. p0452 code references low input, meaning pressure being measured is below threshold. You would need to get a scan tool that can accurately measure the voltage output with the sensor plugged in during driving cycles. Something is open not allowing the fuel tank to seal enough for the pressure minimum to be met in the computer.
Hey I have a 2001 2.2l Chevy s10 that is giving me the P0452 code, I replaced the fuel pump and when I start it, it’s rough and it eventually shuts off after shaking really bad I’ve changed out so many parts already and swap engines I don’t know what to do at this point and I could really use some help
If you've changed the engine out because of the p0452 code, I highly recommend you take your vehicle to a local mechanic or someone knowledgeable in engine troubleshooting/repair.
Donnie, thanks for the video. I have a 2000 S10 that keeps showing a po440 code. I have replaced purge solenoid, vent valve and cannister. Also new gas cap and fuel filter. and air pump. My scanner shows evap working but now it has the c for catalyst blinking. It has shown the code po440 again but I know the evap system is good. I bought this truck new and it has had no mods at all done to it. Just wondering if this could be my problem. Thanks, Don.
corr1chevy my issue lied in the fuel pump assembly. when I bought it brand new, the device that lets fuel vapor out of the fuel tank was locked and would trap vapor. I also replaced the same components you did, but the device on the fuel pump is what allows vapor to those components. I would check the fuel pump, and look at the device I described as "anti rollover valve" in the video series.
