P0255 Code - Injection Pump Fuel Metering Control 'A' Intermittent
|P0255 code possible causes
- Faulty Fuel Pump
- Fuel Pump harness is open or shorted
- Fuel Pump circuit poor electrical connection
- Faulty Engine Control Module (ECM)
|How do I fix the P0255 code?Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|Cost of diagnosing the P0255 code
Labor: 1.0The cost of diagnosing the P0255 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|What are P0255 code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
|P0255 code descriptionThis fault code is stored in the Engine Control Module (ECM) when the system cannot correctly control the fuel pressure. The engine control module uses feedback from the fuel pressure sensor to monitor fuel pressure. The fuel inlet metering valve circuit integrity is also monitored to ensure the circuit and component are functioning correctly.
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.
|Need more information with the P0255 code?Need more information on how to fix the P0255 code? Get Access to Factory Service Manuals
|P0255 code information for specific makes
- P0255 MERCEDES-BENZ Injection Pump Fuel Metering Control 'A' Intermittent
|Need help with a P0255 code?Get the P0255 code diagnosed by a professional: Find a repair shop in your area
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