Engine-Codes - Mercedes-benz - P0451 Mercedes-Benz

P0451 Mercedes-Benz Code - Evaporative Emission Control System Pressure Sensor Range/Performance

- Code Popularity: 26,973 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the Code P0451 Mercedes-Benz?

  • Faulty Evaporative Emission System (EVAP) Pressure Sensor
  • Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
  • Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

|How to Fix the P0451 Mercedes-Benz Code?

Start by checking 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.

|What is the Cost to Diagnose the Code P0451 Mercedes-Benz?

Labor: 1.0

The cost to diagnose the P0451 Mercedes-Benz 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.

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|When is the P0451 Mercedes-Benz Code Detected?

An improper voltage signal from EVAP control system pressure sensor is sent to Engine Control Module (ECM).

|What are Code P0451 Mercedes-Benz Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the P0451 Mercedes-Benz Code Mean?

The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.

Evaporative Emission Control System Pressure Sensor Range/Performance

|Need more Information on the P0451 Mercedes-Benz Code?

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|Need Help with the P0451 Mercedes-Benz Code?

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