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Thread: Codes P0452 and P0453
10-29-2009, 08:58 PM #1
Codes P0452 and P0453
I have got the 453 before but this is the first time for the 452, do I really need to change a sensor? Will this low input on the sensor really hurt anything?99 K1500 Suburban LT "THE BEAST"
Hypertech III, K&N, true dual
05 17" Silverado rims
99 LS 1500 5.3 "THE MULE"
Reg Cab Long Box
285/75/16E Dunlop Rover M/T
Hypertech III, K&N, Flowmaster Super 10, no cats
10-30-2009, 08:17 AM #2
It will keep your check engine light active and will keep your OBD checks incomplete. The 452 is low input and the 453 is high input. So something is screwy with the sensor. Have you ever changed it?Jim
2004 SILVERADO 2500HD LS
Pro Comp Leveling Kit
285-75-16 Cooper ST All Terrains
Pro Comp Programmer
Linux Bed Liner
1967 Landcruiser <350 Chevy>
1990 Geo Metro Convertible
2007 FJ Cruiser
10-30-2009, 08:34 AM #3
Have never changed it, I reset them last night and they havent come back on yet. Wouldnt even know whee to start with them.
Jim, is this the correct one?
Last edited by vncj96; 10-30-2009 at 09:07 AM.
10-30-2009, 02:34 PM #4
11-02-2009, 04:27 PM #5
Ok so the light came on again and then went out by itself, and I have noticed my MPG has dropped for this tank, does this sensor take the place of the fuel pressure regulator or what does it actually do?
11-02-2009, 05:24 PM #6
The EVAP system is completely separate from the fuel system, so it has nothing to do with the regulator.
If you follow your fuel lines, you will find three lines off of the tank: 1 is the fuel supply line (from the pump to the engine), 2 is the fuel return line (from the regulator to the tank), and 3 is an EVAP line. As the tank breathes (so you don't a vacuum or pressure built up in the tank), the EVAP systems job is to make sure the gasoline vapors from the tank end up going to the intake so they can be burned. The pressure sensors are there so the computer knows if the EVAP system is doing its job correctly.
I haven't had to do anything with my EVAP system, yet, so I'm not real familiar with it either. Go down to your library and find entries 2 and 3 in the following list http://ipac.selco.info/ipac20/ipac.j...ll&Search=Find
Look through the Mitchell manuals and see if they have the "light truck engine performance, diagnosis, and troubleshooting" manual for your year (or near your year). In there, you should find complete diagnostic and repair information for your codes.'98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
'92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
"My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World
11-03-2009, 10:40 AM #7
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