What is the OBD2 code for a Mercedes fuel pump?
OBD2 Code P0627 Mercedes definition: ECM detected an open or short in the fuel pump relay circuit
Where is the fuel pump control module located?
It is often found in the fuse box located in the engine bay and functions as the primary electronic switch that controls power to the fuel pump. The fuel pump relay is usually controlled by the ignition or Powertrain Control Module, and when switched on, will provide current to the fuel pump so that it may function.
How does the Mercedes Benz engine management system work?
OBD II software and hardware, integrated fully in the engine and engine management, monitors components that influence exhaust and evaporative emissions from the vehicle. Diagnostic trouble codes (DTCs) are generated and stored in the ECM whenever a problem with a component or system is detected.
Where is the ECM located in a Mercedes Benz?
The ME-SFI engine control module (ECM) is at the right rear of the engine compartment. ECM inputs include: The electrically operated fuel pump and the integrated fuel pressure regulator are located underneath the vehicle, to the right and forward of the fuel tank.
How to troubleshoot a Mercedes Benz fuel pump problem?
Troubleshooting a bad fuel pump problem on a Mercedes-Benz is easy. This is a job where you need to be extremely careful because you will work near fuel and there is always the risk of fire. It is recommended that you empty the tank or have the fuel tank near empty when you replace the fuel pump.
What should I do if my Mercedes fuel pressure is zero?
If your Mercedes doesn’t start, check the fuel pressure. If you are getting zero reading, you either have an electrical problem or a bad fuel pump. If the check engine light is on, consider yourself “lucky” as it can make your diagnosis easier. Note that not all faults will trigger the check engine light.
OBD II software and hardware, integrated fully in the engine and engine management, monitors components that influence exhaust and evaporative emissions from the vehicle. Diagnostic trouble codes (DTCs) are generated and stored in the ECM whenever a problem with a component or system is detected.
How much does it cost to replace a Mercedes fuel pump?
Don’t be surprised if your Mercedes goes into limp mode for fuel related problems. Use Star Diagnostic scanner to perform a complete system scan. To replace the fuel pump on a Mercedes-Benz, it costs between $450 and $800 depending on the MB model. You will pay about $300-$450 for parts (fuel pump) at the dealer.