P0091
Fuel Pressure Regulator 1 Control Circuit Low
DTC P0091, sometimes indicated as P009100 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing fuel pressure regulator 1 control circuit low.
The fuel pressure regulator 1 control circuit low (DTC P0091) is a generic OBD-II trouble code that applies to most vehicles.
This code typically means that there is a problem with the fuel pressure regulator 1 circuit, most likely a wiring issue or a bad component.
There are a few things that you can do to troubleshoot this code:
-Check the wiring and connectors for damage or corrosion
-Check the fuel pressure regulator for damage or leaks
-Check the fuel pressure in the system
-Check the engine sensors for proper operation
- P0091: Fuel Pressure Regulator 1 Control Circuit Low
- P0091: Fuel pressure regulator 1 – short to earth
- P0091 02: Fuel Pressure Regulator 1 Control Circuit Low Voltage
- P0091 00: Fuel pressure regulator 1 - short to earth
Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.
- PI-0067 - ENGINE AND ENGINE COOLING:ENGINE
CADILLAC: Cadillac: intermittent malfunction indicator lamp (mil)/check engine light on, reduced engine power message, dtcs P0116, P0117, P0118, P0119, P00C9, P0091 set. This condition may be caused by chafing of the engine wiring as the harness ro - 1801306 - ENGINE AND ENGINE COOLING:ENGINE
CHRYSLER: Dtc's P2152, P0152, P0154, P0151, P0089, P0091 and P0092 are being incorrectly reported for P2149, P0132, P0131, P0087, and P0088. *tt
2016 GMC YUKON XL with 42000.0 miles
We have had our 2016 Yukon Xl for almost 2 years. Last year we started experiencing episodes where the vehicle will shift down into reduced power mode with P0090 and P0091 as the fault codes. We have been working with the dealer, but once the vehicle has been turned off for about 20 minutes or so it clears and leaves no trace of an issue. This is extremely dangerous and recently shifted into reduced power leaving us only able to drive 35 miles per hour. We were on the highway in maryland with cars flying around us at ~80 miles per hour. We had all of our children in the car and were in the far left lane. The reduced power made it nearly impossible to get to the right shoulder safely. I have a friend with a new Gmc sierra that has the same issue. He dropped it off at his dealer for 3 weeks and returned it finding any issues. This is very dangerous and needs to be addressed. All it will take is someone dying to turn it into a class action lawsuit.
VEHICLE SPEED CONTROL, VEHICLE SPEED CONTROL
2013 KIA OPTIMA with 170000. miles
Check engine light came on, took car to local o'reilly auto parts for them to see what the problem was. Gave code P0091 which yeilded part pr536 - fuel pressure regulator. Called rick case Kia, duluth, ga (absolute terrible service/customer service, numerous times)...Car isn't under warranty, will not cover...Immediately said o'reilly's was wrong - it's the entire fuel pump - quoted $800 to change. Called a second time, spoke with someone different, said $600 to change fuel pressure regulator. Car isn't running any different. Check engine light came on about $170k mile mark.
FUEL/PROPULSION SYSTEM, FUEL/PROPULSION SYSTEM