What is P0090 : Engine Error code Causes Explained
This Guide covers the P0090 engine trouble code, which signals a fuel pressure regulator control circuit malfunction. This DTC may affect performance, fuel economy, and drivability.
How to Identify a DTCs Number
The Diagnostic Trouble Code (DTC) P0090 refers to “Fuel Pressure Regulator 1 Control Circuit/Open. This error occurs when the Engine Control Module (ECM) detects an issue in the electrical circuit controlling the fuel pressure regulator.
Understand, this trouble codes (DTCs) are 5 characters: 1 letter, 4 numbers. P-Powertrain indicates the fault code’s location. Generic or manufacturer-specific codes are indicated by the first digit. The second digit denotes the subsystem (7=transmission). The last two numbers describe the issue.
To identify a P0090 error, use an OBD-II scanner and check for stored or pending codes. If the scanner displays P0090, it means there is a problem with the wiring, connector, or fuel pressure regulator itself.
Causes of P0090 Code:
- Fuel pressure regulator :
The regulator may be defective or have a control circuit issue - Fuel rail pressure sensor:
The sensor may be faulty or have a wiring issue - Fuel pump:
The pump may be faulty or damaged - Electrical wiring:
The wiring or connectors may be faulty or open - Fuel pump driver or relay:
The driver or relay may be faulty - PCM or ECM:
The powertrain control module or electronic control module may be faulty - Valve:
There may be a minor issue with the valve
Risk Level of P0090 Error Code:
The P0090 engine error code indicates a High-Risk Level
Immediate inspection and repairs are strongly recommended to prevent further damage and ensure vehicle safety.
Common Car Brands Affected by P0090 Code:
The P0090 engine error code is commonly found in the following list.
- Opel
- Vauxhall
- Kia
Video: P0090 Engine Error code
FAQ’s
What is the P0090 error code?
The P0090 code indicates a Fuel Pressure Regulator Control Circuit Malfunction, meaning the Powertrain Control Module (PCM) detects an issue with the fuel pressure regulator.
What causes the P0090 error?
Common causes include a faulty fuel pressure regulator, damaged wiring, a failed fuel pump, or issues with the PCM.
What is the risk level of the P0090 code?
The risk level is high as it can lead to fuel pressure instability, poor engine performance, stalling, or starting issues.
Which vehicles are affected by the P0090 code?
This code is common in turbocharged and direct-injection vehicles, including Opel, Vauxhall and Kia models.