Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P0258 OBD-II Trouble Code: Injection Pump Fuel Metering Control “B” Low (Cam/Rotor/Injector)

P0258 OBD-II Trouble Code: Injection Pump Fuel Metering Control “B” Low (Cam/Rotor/Injector)

Check Engine Light

P0258 code definition

Injection Pump Fuel Metering Control “B” Low (Cam/Rotor/Injector)

What the P0258 code means

P0258 is an OBD-II generic code for the injection pump fuel metering control valve circuit having low or no current flow when the engine control module (ECM) does not receive a signal from the fuel enrichment valve.

What causes the P0258 code?

  • The engine control module (ECM) monitors the fuel injection pump metering valve position current feedback when commands to control the valve are sent to the valve from the ECM.

  • The ECM attempts to move the valve, and if the current is low or out of specifications, then it sets the code P0258 and turns on the Check Engine Light.

  • The problem can be due to an open circuit in the wiring or connector to the injection pump.

  • The battery is below 8 volts or the injector power relay has an open circuit.

What are the symptoms of the P0258 code?

  • The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.
  • The engine may run too lean or too rich depending on the fuel valve failed position.
  • The engine may have reduced engine power and rough running conditions.

How does a mechanic diagnose the P0258 code?

  • Scans codes and documents the code in the ECM

  • Diagnose code as per the manufacturer's pinpoint test to verify the pump voltage supply and circuits are good to prevent replacing a good injection pump

  • Tests the battery to make sure it does not fall below 8 volts during cranking or vehicle operation

  • Verifies voltage is above 8 volts getting to the fuel injection pump fuel control circuit

Common mistakes when diagnosing the P0258 code?

  • Clearing ECM memory codes before checking the freeze frame data of the failure

  • Failing to clear ECM codes after the P0258 codes are fixed and then retesting the system

  • Failing to make sure the batteries are fully charged and above 8 volts during the starting of the engine

How serious is the P0258 code?

Code P0258 is an indication that the fuel injection pump cannot control fuel into the engine and the power supply to the injection pump must be repaired or the pump must be replaced to fix the code and drive symptoms.

What repairs can fix the P0258 code?

  • Replace the fuel injection pump
  • Clear codes and road tests the vehicle to verify the code does not return
  • Replaces the fuel filter and contaminated fuel before the injection pump is replaced
  • Repairs or replaces the battery power supply to the injection pump circuit

Additional comments for consideration regarding the P0258 code

Code P0258 is generated by a diesel engine vehicle that has an injection pump that cannot control the amount of fuel injected into the cylinders and will cause the code to set. Some vehicles may have a fuel valve that can be replaced without replacing the entire fuel injection pump. Follow the manufacturer pinpoint tests for diagnosis and repair for your vehicle. The vehicle batteries cannot fall below 8 volts to supply enough voltage to the fuel injection pump fuel control valve, and if it falls below the 8 volts, it can generate the failure code. Check the batteries first.

Need help with a P0258 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...


Related questions

Q: Code p0010 camshaft actuator comes up, and mis fires. Just replaced intake manifold and these weren't issues before that.

Hi there. There are a few possibilities here. It is possible that you had a valve timing issue prior to working on the manifold. These engines have a ton of issues with the balance shaft and the valve timing as...

Q: Check Engine Light O2 sensor slow

Hello. The computer reset only puts the computer in a position that it will control the fuel as if you just bought the car. As the vehicle is driven and a defective O2 sensor gives a bad input to the...

Q: Engine light is on

Hello. Diagnostic Trouble Codes (DTC's) do not necessarily identify faulty parts. For example, the Code you are inquiring about, namely, P0126 could set the Check Engine Light (CEL) simply because the coolant level in your car is too low. If...