Fault code P2293 – fuel pressure regulator 2 performance problem

Fault code P2293 is called “Fuel Pressure Regulator 2 Performance Problem” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P2293

This Diagnostic Trouble Code (DTC) is a general powertrain code. Error P2293 is considered a general code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly from model to model.

Fault code P2293 – fuel pressure regulator 2 performance problem

In some non-return systems, the fuel pressure is controlled by a variable speed low pressure feed pump. It is controlled directly by the engine module (ECM).

Other non-return systems regulate fuel pressure with a fuel pressure regulator (FPR). The FPR can be mounted on the high pressure fuel pump or on the fuel ramp.

To regulate fuel ramp pressure, the ECM sends a command to the FPR depending on demand. The controller uses the fuel ramp pressure sensor to continuously monitor fuel pressure.

If the controller detects a problem, such as an unexpected increase or decrease in fuel pressure. It sets the diagnostic trouble code DTC P2293 – performance problem.

Symptoms of vehicle malfunctions

The main signal that an error P2293 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. The “Check engine” control lamp on the control panel will light up (the code will be written to the ECM memory as a fault).
  2. The engine does not accelerate well.
  3. Decrease of the engine power.
  4. The engine is stalling or does not start well.
  5. Floating revolutions, as well as attempts to stall at idle.
  6. Increased fuel consumption.
  7. If fuel pressure is too high, detonation in the engine may occur.
  8. Black smoke coming out of the exhaust pipe.

The error P2293 is quite serious, as its occurrence may cause problems with the engine and vehicle handling. If this code is detected, it is recommended to contact a qualified technician as soon as possible to diagnose and correct the error.

Factors that can cause this error code

The error code P2293 can mean that one or more of the following problems have occurred:

  • Fuel pressure regulator malfunction.
  • Problem with wiring or connectors.
  • Clogged fuel filter or fuel lines.
  • Faulty fuel pressure sensor.
  • Loss of power at fuel pump due to malfunction.
  • System malfunctions due to air leaks in fuel.
  • Pressure fluctuations may be caused by too low fuel level.

How to fix or reset OBD-2 code P2293

Some suggested steps for troubleshooting and fix the error code P2293:

  1. Check the fuel pressure.
  2. Test the fuel pump.
  3. Inspect the fuel lines.
  4. Make sure the regulator on the fuel rail is working properly.
  5. Pay attention to the fuel pressure sensor.

Diagnose and repair of problems

When the cause of the error, in this case P2293, lies on the surface and can be easily fixed, it is one thing. But sometimes it happens that the cause is very difficult to find, so let’s go through the most important places.

Fuel pressure as well as the fuel pump

Fuel pressure can be checked with a mechanical pressure gauge attached to the fuel rail. If the pressure is within factory specifications, there may be a faulty fuel pressure gauge giving false readings to the PCM/ECM.

If you can’t get to the test point with a pressure gauge, you can connect some fittings between the fuel lines and the fuel ramp. You can also use a diagnostic tool to check, which will show the results in real time.

Check the fuel pump for sufficient power by finding the wiring harness. Measure the battery voltage at the positive terminal of the fuel pump with a digital voltmeter.

If not enough power, test the wiring to the fuel pump. See if there is excessive resistance, loose wires, or faulty connections.

Fuel lines and regulator

Look for physical damage or kinks in the fuel lines that could cause difficulties in the supply or return line. It may be necessary to remove the fuel filter to determine if it is clogged and needs to be replaced.

Fuel should flow freely in the direction of flow indicated by the arrow on the fuel filter. On some vehicles the filter is located at the inlet of the fuel pump itself, you will need to remove the module. To determine if there is a lot in the tank, which can also restrict the flow of fuel to the pump.

On vehicles equipped with a reverse fuel system, the regulator is usually located on the fuel rail itself. The fuel pressure regulator has a vacuum line that mechanically limits the fuel supply based on the amount of vacuum created by the engine.

Check for damaged or loose vacuum hoses to the regulator. If there is fuel in the vacuum hose, there may be an internal leak in the regulator, resulting in a loss of pressure.

On non-return systems, the fuel pressure regulator may be located inside the gas tank on the fuel pump module, and the fuel pump module assembly may need to be replaced.

Fuel pressure sensor

Check the fuel pressure sensor by removing the connector and checking the resistance at the terminals using a voltmeter. Resistance should be within factory specifications. Check the reference voltage to the fuel pressure sensor, it should be about 5 volts, depending on the vehicle.

If the voltage is not within specifications, inspect the wiring to determine if there is excessive resistance in the wire. It should be very low, close to 0 ohms. If resistance is present, a ground fault may have occurred and the wiring will need to be traced to locate the fault.

By checking these points, you should be able to determine the problem of error P2293. Once determined, it shouldn’t be too difficult to solve.

On which vehicles does this problem occur most frequently

Fault code P2293 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • Audi (A4, Q5)
  • Chevrolet (Captiva)
  • Daewoo (Winstorm)
  • Ford
  • Hyundai (HD65, HD78)
  • Infiniti
  • Nissan (X-Trail)
  • Opel (Vivaro)
  • Porsche (Cayenne)
  • Renault (Trafic)
  • Skoda (Octavia, Superb, Yeti)
  • Volkswagen (Golf, Jetta, Passat, Tiguan, Touareg)

Fault code P2293 can sometimes be found with other errors. The most common are the following: P0016, P0087, P0089, P0341, P2187, P2294, P2995, P2296.

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