P219A - and extremely high fuel rail pressure

[GigaShad]

P219A code appeared (“Bank 1 air fuel ratio imbalance”), with no noticeable symptoms. I used scan tool to pull diagnostics and noticed my fuel rail pressure was around 2000 psi. Quick search shows fuel rail pressures should be closer to 100 psi.

I cleaned the MAF sensor and cleared the code, drove for about 40 miles and the code has not reappeared, but the fuel rail pressure has not changed.

Any advice to resolve this issue? Is my fuel pressure really that high, or do I have a bad sensor? I’m not sure where to start in my troubleshooting approach.

Thanks in advance for any help.

 

[ShakenCoffee]

From my understanding when I looked into this with the same code (among others), high side fuel pressure should be around that PSI (which I assume is what your monitors are referencing). Low side fuel pressure should be ~80 on idle and ~100 on throttle, from what I read.

For me, I replaced my purge valve first. It seemed to fix the issues, but then the same issues came up (sputtering and stalling, along with a P008B code). I then replaced the low side fuel pressure sensor, which cured everything.

 

[TyphoonFiST]

These cars do not have MAF sensor* for The love of god. It's just for Temperature sensing. They are MAP based systems. The fuel pressure on the Lowside fuel pump in the tank should be 80-100psi then it comes through the High Pressure Fuel Pump and ramps the pressure for the DI system .2k doesnt seem to far off of spec though.