Join Date: Mar 2018
Drives: Sorento LX AWD 2.4L 2012
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P0091 Fuel Pressure Regulator 1 Control Circuit Low
2012 Sorento LX AWD 2.4L GDI 182 000 km
-Bought used in December 2015 w/ 117 000km
-Burns oil, about 1L per 1000km
-Replaced battery mid Dec 2017
P0091 Fuel Pressure Regulator 1 Control Circuit Low:
-Reduced engine power, stutter from stop to accelerating up to speed
-Lack of acceleration, can't pass or merge, gears down 1 or 2 gears, RPM hits 5-6k but no acceleration
No start or hard to start:
-It will crank an extra couple of seconds to start
-Crank to almost start then shut off, no more cranking or starter noise.
-The starter will turn but not crank, CEL light on and immobilizer light on, no code stored or detectable
-Will start in N or shifting from P to D to P (no longer working)
Misfires counted within Torque Pro App:
-From all cylinders, a few per cylinder per drive cycle
-Seem to be more misfires when trying to accelerate hard or driving aggressively
The P0091 code started to intermittently show up in the summer of 2017. Shortly after the CEL I received the engine recall notice. I brought my Sorento into the dealer to have the recall inspected and the P0091 code diagnosed.
I was told my engine did not show any signs of needing replacement but that the P0091 code required an entire fuel system to rectify the code. Tank pump, fuel lines, high pressure pump, delivery tube, and possibly the rail pressure sensor.
I had another local shop replace the rail pressure sensor. No change in symptoms, except the CEL P0091 comes on less frequently but is still detectable as pending with a code scan. The starting issues are getting worse.
I checked the wiring from the high pressure fuel pump to the ignition coils and across the top of the engine for damage. I couldn't find any sings of damage. I tested the resistance of the sensor on the high pressure fuel pump, it is 0.5 ohms, seems within spec.
I brought it back to the dealer for another diagnostic on the starting issues. No mention of the fuel system or the P0091 code that was on when I brought in. I was told that it was all with the starter, no more fuel system issues.
I'm asking for any insight on the P0091 code and a more specific fix than the entire fuel system. Dealer isn't willing to try to replace individual sensors or parts, just the entire fuel system.
Would the starter cause the hard starts or no starts? I'm confused because sometimes it starts fine for days and then no starts or hard starts for days.
Also what does the engine recall replace. Is it the entire engine with components, or is it just certain parts within the engine?
Thank you in advance for any and all advice.