P0260 Code - Injection Pump Fuel Metering Control 'B' Intermittent
Quick Answer
This fault code is stored in the Engine Control Module (ECM) when the system cannot correctly control the fuel pressure. Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0260 indicates Injection Pump Fuel Metering Control 'B' Intermittent.
- Common causes
- Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0260 Description
Normally manufacturers will support data parameters for actual and desired fuel pressure.
A number of issues may cause this fault code to be set such as a faulty fuel rail pressure sensor, a mechanical fault with a fuel inlet metering valve could cause the valve to become stuck. An electrical fault such as an open circuit in the fuel inlet metering valve on a system with a normally closed valve will also cause this situation. A short circuit on the control wire of a normally open fuel pressure regulator will also cause this fault.
A fault in the fuel injector return system will cause the fuel pressure to be lower than expected. This causes fuel from the high-pressure circuit to be leaked back to the low-pressure circuit. A faulty maximum pressure relief valve will also cause this situation.
The high-pressure pump should also be tested to ensure it is capable of delivering the required volume of fuel.
What are the Possible Causes of the DTC P0260?
- Faulty Fuel Pump
- Fuel Pump harness is open or shorted
- Fuel Pump circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0260?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0260 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- P0260 Mercedes-Benz — Injection Pump Fuel Metering Control 'B' Intermittent
Frequently Asked Questions about P0260 Code
What does OBDII code P0260 mean?
Code P0260 indicates an intermittent issue with the injection pump fuel metering control 'B' circuit, which manages fuel delivery to the engine.
What are the common symptoms of code P0260?
Symptoms may include engine misfires, poor fuel efficiency, rough idling, difficulty starting, and the illumination of the check engine light.
What causes the P0260 code to appear?
Common causes include a faulty fuel injection pump, damaged or corroded wiring/connectors in the fuel metering control circuit, or a malfunctioning fuel control module.
Can a clogged fuel filter trigger code P0260?
While not a direct cause, a clogged fuel filter can restrict fuel flow, potentially leading to issues that affect the performance of the injection pump.
How can I diagnose the P0260 code?
Start by checking the wiring and connectors in the fuel metering control circuit for damage or corrosion. Use a scan tool to monitor fuel pressure and injection pump performance.
Is it safe to drive with a P0260 code?
Driving with this code is not recommended, as it can lead to poor engine performance, reduced fuel efficiency, and potential long-term damage to fuel system components.
How do I fix the P0260 code?
Repairs may involve replacing the fuel injection pump, repairing or replacing damaged wiring/connectors, or updating the vehicle's engine control module (ECM) software.
Can low fuel pressure cause the P0260 code?
Yes, insufficient fuel pressure due to a failing pump or restricted fuel line can contribute to the issue.
Will clearing the code fix the problem?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be addressed to prevent the code from returning.
What tools are needed to troubleshoot the P0260 code?
Essential tools include an OBDII scanner, a multimeter for checking electrical connections, and potentially a fuel pressure gauge to test the system.
Discuss the causes and fixes for P0260 OBDII Code
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