Fuel,pressure sensor
I have a code for a fuel pressure sensor..I have one ordered.. only $26 .. figured I put a new one….where on my 2013 express 5.3 is it.. it’s not a TANK pressure sensor…some say on the fuel rail…some say under the drivers seat on fuel line….where should I look…thanks
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post the code please
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The code is p0191.
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Originally Posted by loopedr1
(Post 497567)
The code is p0191.
DTC is set when a pressure change of at least 4psi is not detected when the pump is turned on. Before throwing parts at this, you'll want to try some basic troubleshooting. The sensor could be working perfectly fine. I would put a gauge on the fuel rail to verify the pressure. I would suspect the pump before this sensor. Use a DMM to test if you get a good 5V reference signal between pin 3 (Brown) and ground. (ignition on) This is an underbody harness so it exposed to the weather, debris etc. Check for moisture/corrosion in the connector. Try unplugging/replugging it a few time to wipe the terminals, and apply some dielectric grease.
Originally Posted by loopedr1
(Post 497536)
I have one ordered.. only $26
Originally Posted by loopedr1
(Post 497536)
where should I look
http://chevygmcvans.com/viewtopic.php?t=11113 Or more up-to-date ones on gmupfitter.com |
Seams like a lot of info for a simple question… it has fuel pressure at the rail… I ordered a GM oem part number from Amazon.. thanks for the diagram for the location .. that’s all I really needed….
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Originally Posted by loopedr1
(Post 497572)
Seams like a lot of info for a simple question
I'm trying to provide ALL the information that you (or anyone who might be looking in the future) might need to solve the problem. I've NEVER had anybody complain about getting too much information, so that's a first.
Originally Posted by loopedr1
(Post 497572)
it has fuel pressure at the rail
Also , squirting a bit of fuel out the valve doesn't constitute measuring properly with a gauge and monitoring for pressure changes.
Originally Posted by loopedr1
(Post 497572)
I ordered a GM oem part number from Amazon
Originally Posted by loopedr1
(Post 497572)
thanks for the diagram for the location
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