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P0090 is a diagnostic trouble code (DTC) for "Fuel Pressure Regulator 1 Control Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
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A P0090 diagnostic trouble code is referencing an issue with the fuel pressure regulator circuit.
This code is similar to P0089, P0091, and P0092.
P0090 is an OBD-II code telling us there is a fault found within the fuel pressure regulator control circuit. This DTC is triggered when the ECM finds out-of-range performance from the control circuit. Out of range performance causes a Check Engine Light and a failsafe mode. Failsafe mode will remain in effect until normal sensor operation is detected or the issue is fixed.
The fuel pressure regulator code may have some common causes:
Common symptoms are:
The mechanic will begin by checking for any diagnostic trouble codes (DTC’s). DTC’s will have freeze frame data associated with each code that this tells us important information for the test drive.
Next, the code will be cleared and a road test is performed. The road test should be under similar conditions to the freeze frame data.
A visual inspection will be performed to look for any damaged or broken wiring, sources of poor connection, and proper operation of the fuel pressure sensor.
A scan tool will be used to monitor fuel pressure control system operation. If the fuel pressure regulator control solenoid operates properly, then a manufacturer specific ECM test must be performed.
Mistakes are commonly made when steps are not followed in order or are skipped altogether. Though the fuel pressure regulator is the typical cause, it must be tested before it is condemned and replaced. This will prevent repairs from being performed that do not address the actual fault.
Most people may only notice the Check Engine Light and no other adverse symptoms. In cases where drivability concerns are present, the vehicle should be checked immediately by a qualified mechanic.
Typical repairs for P0090 are:
Professional scan tools are standard equipment for qualified mechanics. These scan tools will be required to view live sensor data, changes over time, readings from the ECU, and fuel pressure. In contrast, standard scan tools will only show what codes are present and will not be able to provide as extensive data.
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