P0260 — Injection Pump Fuel Metering Control "B" Intermittent (Cam/Rotor/Injector)

powertrain (engine/transmission)

Is it safe to drive?

Caution: intermittent fuel-metering fault P0260 may be driven briefly if the engine runs smoothly, but hesitation, stalling, or power loss can occur without warning. Avoid heavy load and schedule diagnosis promptly. Stop driving if the engine stalls, loses substantial power, or the warning condition returns.

Typical symptoms

  • The check-engine light may illuminate with P0260 stored as a current, pending, or history code
  • Rough idle, hesitation, or uneven acceleration may occur when the intermittent fault appears
  • A sudden loss of power or engine surge can happen under load
  • Hard starting, difficult restarting, or stalling may occur if fuel metering is briefly interrupted
  • Unusual exhaust smoke may accompany inconsistent injector operation
  • The symptom may appear only when the engine is cold, hot, under load, or during vibration

Common causes

  • Intermittent cam or rotor position feedback used by the injection pump for fuel-metering control
  • Failing or sticking fuel-metering control solenoid, valve, or actuator in the injection pump
  • Intermittent injector coil, injector driver, or internal pump injector connection
  • Corroded, loose, or water-contaminated connector in the injection-pump or injector wiring
  • Chafed wiring, an open circuit, or a short affecting the control B metering circuit
  • Injection-pump control module driver, power supply, or poor ground connection
  • Fuel contamination or carbon deposits causing an injector or metering control element to operate erratically

How to diagnose with an OBD scanner

  1. Capture the P0260 failure data Connect an OBD2 scanner through an ELM327 adapter or AIScanAuto, then read stored, pending, and permanent codes. Save the P0260 freeze-frame data, including engine speed, load, coolant temperature, and battery voltage. If available, compare injector command or fuel-metering data with actual engine response.
  2. Inspect the fuel-metering wiring Examine the injection-pump and injector connectors for corrosion, loose terminals, trapped water, heat damage, and chafed wires. Verify battery power and ground integrity, check the control B circuit against the model-specific wiring diagram, and repair damaged wiring or terminals before replacing components.
  3. Reproduce the intermittent fault While watching live scanner data and engine operation, gently move the wiring near the pump and injectors, vary engine load, and repeat the conditions that originally set P0260. A momentary loss of metering command, injector pulse, cam or rotor data, or engine RPM can identify an intermittent connection.
  4. Test fuel delivery and injector operation Verify injection pressure, delivery volume, and injector balance against service specifications. Check injector electrical resistance and commanded response, and inspect spray pattern for uneven delivery. Contaminated fuel or deposits should be addressed if testing shows inconsistent injection.
  5. Check cam, rotor, and pump timing If wiring and injector tests are normal, inspect the cam or rotor position sensor, pump timing, and internal control elements using the manufacturer procedure. Confirm sensor air gap, rotational alignment, and excessive wear before concluding that the injection pump requires internal service.
  6. Repair the verified fault and retest Replace or repair only the component confirmed by testing. Clear P0260 with the scanner, repeat the road conditions that triggered the code, and confirm smooth idle, stable power, and correct injector or metering data. If the code returns without an external wiring fault, continue testing the pump driver and pump internals.

Approximate repair cost

Independent-shop estimates for P0260 are approximately $150–$350 USD for diagnosis, $200–$900 for wiring, connector, sensor, or metering-solenoid repair, and $600–$2,000 for injector or injection-pump internal work. These figures are estimates and vary by region and parts availability.

Common questions

What does P0260 specifically identify?

P0260 identifies an intermittent fault in the injection-pump fuel-metering control B path, involving the cam or rotor reference, a metering element, or the injector circuit. Exact pin assignments and test values are model-specific.

Does P0260 prove that the entire injection pump has failed?

No. P0260 can be caused by an intermittent sensor, metering solenoid, injector connection, damaged wiring, or control driver. Testing during the failure condition is needed before condemning the pump.

Can I drive with P0260 stored?

A short gentle trip may be possible if the engine runs smoothly, but the intermittent code can lead to hesitation or stalling. Avoid sustained load, diagnose promptly, and stop driving if the engine stalls or loses power.

Will an ELM327 or AIScanAuto scanner diagnose P0260?

An ELM327 or AIScanAuto scanner can retrieve P0260 and capture freeze-frame or live data when supported, but model-specific pump, injector, and wiring procedures may still be required to locate the intermittent fault.

The engine control module logs code P0260 when it catches a fault in how the engine meters and delivers fuel. In plain language: the system responsible for controlling fuel delivery on bank B — whether through a mechanical cam, rotor, or electronic injector arrangement — is acting up intermittently. This is a powertrain-category OBD2 code, meaning it touches both the engine and the transmission control systems.

To keep the engine running correctly, the ECU constantly watches fuel pressure and how the injectors respond. It compares actual readings against learned values. When something strays outside the acceptable window for long enough, P0260 gets stored and the check engine light illuminates. The ECU also saves freeze frame data alongside the code — a snapshot of RPM, engine load, coolant temperature, and vehicle speed at the exact moment the problem occurred. That snapshot is your best lead when you start troubleshooting.

P0260 means the fuel metering circuit on one bank of cylinders is delivering an inconsistent fuel charge. The issue might stem from weak pressure, a faulty sensor giving false readings, or mechanical wear in the injection pump itself. Because the problem is flagged as intermittent, it may come and go — which actually makes diagnosis trickier, since the engine might behave normally during your test drive.

Common Symptoms of P0260

  • Check engine light stays on or flickers intermittently
  • Rough idle, especially when warm
  • Hesitation or stumble during acceleration
  • Noticeably higher fuel consumption than usual
  • Extended cranking time when starting the engine
  • General loss of power under load or when climbing hills
  • In extreme cases, a strong fuel odor inside or around the vehicle

What Causes P0260?

  • Faulty fuel rail pressure sensor or damaged wiring leading to it
  • Vacuum leaks or intake system gaps that throw off the air-fuel mixture
  • Wrong or contaminated fuel in the tank
  • Malfunctioning fuel pressure regulator
  • Weak or failing fuel pump unable to maintain consistent rail pressure
  • Corroded or loose electrical connectors in the fuel delivery circuit

How to Diagnose P0260

  1. Hook up an OBD2 scanner and confirm P0260 is present in the fault memory. Save the freeze frame data right away — it shows what the engine was doing when the module first noticed the problem.
  2. Pull any related trouble codes too. Codes pointing to fuel trims, oxygen sensors, or other fuel-related circuits often share a root cause with P0260. Check manufacturer TSB databases for known fixes tied to this code on your specific vehicle.
  3. Get hands-on with the fuel delivery wiring. Inspect the harness and connectors tied to the fuel rail sensor and pressure regulator. Look for frayed wires, corrosion, broken insulation, or connectors that aren't seated firmly.
  4. Measure fuel rail pressure with a gauge and compare it to factory specifications — check both at idle and under moderate load. Out-of-spec pressure in either direction points toward the pump, regulator, or clogged filter.
  5. Watch the short-term and long-term fuel trim values in your scanner's live data. Positive or negative trends tell you whether the ECU is adding or subtracting fuel, which narrows down whether you have a pressure issue or a sensor reading problem.
  6. Clear the code and drive the vehicle through a complete drive cycle — ideally replicating the conditions captured in the freeze frame. If P0260 returns, you've confirmed an active fault and can move forward with targeted repairs.

Repair Options for P0260

Addressing the most likely culprits first keeps costs reasonable:

  • Clean or replace fuel injectors: $200–$800
  • Replace fuel rail pressure sensor or pressure regulator: $150–$450
  • Replace fuel filter: $80–$200
  • Replace fuel pump: $400–$900

How Much Does It Cost to Fix P0260?

The total depends entirely on which part is actually at fault. Based on typical parts-and-labor rates at independent shops:

Cleaning or replacing injectors runs $200 to $800 depending on whether you can clean them or need new units. A failed pressure sensor or regulator typically costs $150 to $450 installed. The fuel filter is the cheapest fix at $80 to $200. At the high end, a failing fuel pump with labor can reach $400 to $900.

Overall, fixing P0260 typically falls between $80 and $900. The wide range is exactly why a proper diagnosis before buying parts pays off — the most expensive component is rarely the first one to suspect.

Can You Drive with P0260?

Drive with caution. This code indicates a fuel metering problem that can lead to stalling, hesitation, or poor throttle response — all risky scenarios in traffic. In severe cases, an overly rich or lean mixture can damage the catalytic converter. Avoid long trips until the issue is diagnosed and resolved.

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