SES LIGHT HELP!

[macifre]

I need help! I'm trying to reset the SES light in my 2000 Silverado Z71 5.3. I get code PO 452 FUEL PRESSURE SENSOR any idea what this may be? I looked up Autozone and did not find any fuel pressure sensor... where is it located? what is its function?

 

I also get ABS/BRAKE light on and off with code EBCM RELAY CIRCUIT. It seems that the relay is malfunctioning... any ideas?

 

Last one... PO332 Knock sensor... I'll replace it, but if I need anything more to know, your help will be greatly appreciated!

 

Thanks

[Shawn T]

It may be your fuel pressure regulator. I'm not sure but I think its located on top of the intake manifold just upstream of the injectors.

[macifre]

that's what I thought of doing, I could not find any pressure sensor. I'll give it a try and post the results. Thanks

[redvett]

I need help! I'm trying to reset the SES light in my 2000 Silverado Z71 5.3. I get code PO 452 FUEL PRESSURE SENSOR any idea what this may be? I looked up Autozone and did not find any fuel pressure sensor... where is it located? what is its function?

 

I also get ABS/BRAKE light on and off with code EBCM RELAY CIRCUIT. It seems that the relay is malfunctioning... any ideas?

 

Last one... PO332 Knock sensor... I'll replace it, but if I need anything more to know, your help will be greatly appreciated!

 

Thanks

 

<{POST_SNAPBACK}>

 

 

 

With that many codes you should clean both the pos. & neg. battery cables at the battery and put grease or electrical silicone grease on them. Try this first.

The knock sensor is under the intake plentum.

[mcreyaufmiller]

Anyone ever think that maybe there are just a few to many sensors on these new trucks? And the fact that most of them are nearly impossible to get to?

 

Mike

[redvett]

Anyone ever think that maybe there are just a few to many sensors on these new trucks?  And the fact that most of them are nearly impossible to get to?

 

Mike

 

<{POST_SNAPBACK}>

 

 

 

Well if you can get the goverment to cut back on emissions & mileage then we can do without the extras but dont forget we may be forced to go back to low torque/horsepower/mileage. I myself prefer the good torque/horsepower & mileage.

[macifre]

Man I sure do miss my 96 Z71.... as I've seen in other threads I think we'd all like to buy a NBS with the old 5.7 and much less electronics and gimiks

 

[mcreyaufmiller]

I like my classic body (1970) Chevrolet truck. No rules, Blown 454, lots of torque and hp, no sensors!!!!!!!!! Oh yeah, and no milage either.

 

Mike

[redvett]

Man I sure do miss my 96 Z71.... as I've seen in other threads I think we'd all like to buy a NBS with the old 5.7 and much less electronics and gimiks

 

But the 5.7L isnt even close in emmissions/fuel economy & performance. Tecnology moves forward if it didnt you wouldnt be talking on the internet.