P0255 Fault Code

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

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0255 fault code indicates a problem in the fuel metering control circuit of the injection pump. Specifically, the fault is related to an intermittent issue with the cam, rotor, or injector.

The injection pump plays a vital role in delivering fuel to the engine, and any issues with fuel delivery can cause engine performance problems such as reduced power, poor fuel economy, and increased emissions.

One possible cause of the P0255 code is a failing or faulty injection pump. Other potential causes include wiring issues, a malfunctioning fuel injector, or a faulty cam or rotor.

To diagnose and solve this problem, a mechanic will use a diagnostic scanner to read the fault codes and perform a visual inspection of the components involved. They may also perform additional tests such as a fuel pressure test to determine the root cause.

Once the underlying issue has been identified, the mechanic can then proceed with appropriate repairs. This may involve replacing faulty components, repairing wiring, or recalibrating the injection pump.

It's important to address the P0255 fault code promptly to avoid further engine damage and ensure optimal vehicle performance.

What are the symptoms of the P0255 code?

The symptoms of a P0255 fault code on cars may include:

• Check Engine Light is ON
• Engine misfires or runs poorly
• The vehicle may struggle to start
• Reduced engine power
• Poor acceleration
• Increased fuel consumption
• The engine may stall or stop running altogether

It is important to address this code promptly to avoid further damage to the vehicle's engine or fuel system. A professional mechanic can diagnose and repair the issue.

What causes the P0255 code?

Possible causes of P0255 fault code on cars include:

• Malfunctioning fuel injector
• Faulty fuel pressure regulator
• Damaged fuel supply lines
• Clogged fuel filters
• Corroded wiring or connectors in the fuel injection system
• Problems with the fuel pump or fuel pump relay
• Issues with the camshaft position sensor or crankshaft position sensor
• Malfunctioning fuel injection pump.

Proper diagnosis of the underlying cause is necessary to determine the appropriate repair or replacement needed to resolve the fault.

How to fix P0255?

To fix the P0255 fault code on a car, you can try the following solutions:

1. Check and replace the fuel filter: A clogged fuel filter can cause the fuel pump to work harder, which can lead to P0255. Replace the fuel filter if it is dirty or clogged.

2. Inspect the wiring and connectors: Check the wiring and connectors from the injection pump fuel metering control module to the Powertrain Control Module (PCM) for any corrosion, damage, or loose connections.

3. Replace the injection pump: If the wiring and connectors are in good condition, the problem may be with the injection pump. Replace the injection pump to fix the issue.

4. Clean the fuel injectors: Dirty or clogged fuel injectors can disrupt the fuel flow and cause P0255. Clean or replace the fuel injectors if needed.

5. Check the fuel pressure: Low fuel pressure can cause P0255. Check the fuel pressure and replace the fuel pump if necessary.

6. Update the engine control module software: In some cases, updating the engine control module software can fix the P0255 code.

It's recommended to take your car to a certified mechanic for proper diagnosis and repair of the issue.