P0258 medium Severity

P0258: Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector)

May cause rough idle, loss of power, hard starting, and increased fuel consumption; check engine light illuminated

Overview

P0258 indicates a low voltage or signal condition in the fuel injection pump’s ‘B’ metering control circuit, often due to electrical faults, wiring issues, sensor/output malfunctions, or component failures

Common Symptoms

  • Check Engine Light illuminated
  • Rough idle or engine hesitation
  • Reduced engine power/performance
  • Hard starting or longer crank time
  • Decreased fuel economy

Most Common Causes

Faulty fuel injection pump metering control ‘B’ circuit component (e.g., solenoid or actuator) high

Low voltage signal to PCM from injection pump fuel metering control B triggers the code

Damaged or corroded wiring/connectors in the fuel metering control circuit high

Electrical resistance or breaks can reduce signal voltage below threshold

Faulty injector, camshaft/rotor sensor or other related sensor medium

Incorrect sensor input can mimic low signal condition

ECM/PCM fault low

Rare, but possible if all wiring and component tests pass

Diagnostic Steps

  1. Use a professional OBD‑II scanner to confirm P0258 and record freeze frame data
    Expected: P0258 stored with associated data such as engine load and voltage values
    Interpretation: Confirms persistent fault and data context
  2. Perform visual inspection of wiring and connectors to injection pump fuel metering control B circuit
    Expected: No corrosion, breaks, or loose pin connections
    Interpretation: If damaged, repair wiring/connectors
  3. Test circuit voltage and continuity with a multimeter
    Expected: Voltage within specified OEM range; continuity without high resistance
    Interpretation: Low voltage or open circuit indicates wiring/component issue
  4. Test fuel injection pump metering control solenoid/actuator and related sensors
    Expected: Proper resistance and signal waveform per manufacturer spec
    Interpretation: Out‑of‑spec values suggest component replacement
  5. Check ECM/PCM for faults and perform software update if TSB applicable
    Expected: No internal ECM errors; latest software calibration
    Interpretation: ECM issue possible if wiring and components are verified good

Repair Solutions

Repair or replace wiring and connectors in fuel metering control B circuit medium
Estimated Cost: $50 - $300

Cost depends on extent of wiring harness damage and labor

Replace injection pump fuel metering control solenoid/actuator or entire pump as needed hard
Estimated Cost: $500 - $2000

Expensive component; confirm failure before replacement

Reprogram or replace ECM/PCM if internal fault diagnosed hard
Estimated Cost: $500 - $1500

Requires professional programming and verification

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Mistaking P0258 for simple injector flow fault or generic engine misfire without confirming injection pump signal circuit

Frequently Asked Questions

Can you explain the meaning of P0258?

When your OBD-II scanner reads P0258, it means: Injection Pump Fuel Metering Control B Low (Cam/Rotor/Injector). This code is related to the vehicle's Fuel System.

Should I stop driving if I have P0258?

The P0258 code is considered medium severity. May cause rough idle, loss of power, hard starting, and increased fuel consumption; check engine light illuminated

How do I know if I have code P0258?

Drivers often report: Check Engine Light illuminated, Rough idle or engine hesitation, Reduced engine power/performance when this code is present.

What parts fail when P0258 is set?

The most common causes are: Faulty fuel injection pump metering control ‘B’ circuit component (e.g., solenoid or actuator), Damaged or corroded wiring/connectors in the fuel metering control circuit, Faulty injector, camshaft/rotor sensor or other related sensor.

What is the price difference for fixing P0258?

Expect to pay around $300 if the issue is a Repair or replace wiring and connectors in fuel metering control B circuit, but up to $2000 if the Replace injection pump fuel metering control solenoid/actuator or entire pump as needed needs replacement.

Does code P0258 apply to Honda vehicles?

The P0258 code is a generic powertrain code, meaning it applies to almost all makes and models, such as Honda, Toyota, VW, Ford, and Chevy.

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