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Got a p0087 Fuel rail/system pressure too low message on my sonata. Where do we get started to fix this issue??
How much do you know about automotive systems ? Do you know how to hook up a mechanical fuel pressure gauge ? Do you have access to a wiring diagram ? Test fuel pump electrical circuit . You should look at factory service info to see what criteria the computer needs to set this code , if you want to diagnose this yourself . There is a sensor on the fuel rail that the PCM monitors to know what the pressure is . You could pay for a subscription at all data an go to DTC'S section an follow diagnostic flow chart or maybe there could be a video on you tube for that DTC . But first you need to know what all is involved in the fuel system .With a sensor on the fuel rail there is more then likely a FPDM - fuel pump driver module - that is commanded on an off (PWM) pulse-width modulation control .
If you don't know any of this your best bet would be to take your vehicle to a qualified repair shop . Sorry , but if you don't know any of this you shouldn't be messing with it .This video is on a ford but pretty much the same .
Ford Electronic Returnless Fuel System Diagnosis Part 1
on Oct 18, 2016
2011 Hyundai Sonata check engine light
It could be something else but this is a 2011, There pretty much right on with the codes now a days. The pressure sensor for the manifold shouldn't be that hard or expensive to replace. Unfortunately is an electrical part, that's the biggest problem. Good Luck
on Oct 12, 2016
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